Best AI Tools for Academic Research in 2026

Generative Engine Optimization platform — get clients cited by AI search

💰 Credit-based — agencies consume credits per audit, content generation, and citation-tracking cycle. Starter Pack $49 one-time for 500 credits. Agency Pro $199/mo for 2,500 credits per month. Custom Forge - Custom pricing.

Google's AI research tool that synthesizes your sources

💰 Free for all users. NotebookLM Plus $20/mo for enterprise features

AI search engine with cited, real-time answers

💰 Free tier. Pro $20/mo with unlimited Pro searches

AI agent that finds the exact affiliate signup page for any SaaS product and flags closed or paused programs

💰 One free search is offered with no signup, and signing up grants 10 free searches with no credit card. The site publishes no price sheet — /pricing returns 404 and no tier table appears on the homepage — so no paid figures are listed here.

AI for predicting protein structures

💰 Free for academic research. AlphaFold Database publicly available

Generates Anki-compatible flashcards from PDFs, slides, Word, EPUB, images, handwritten notes or YouTube — with image occlusion for diagrams, 50+ languages, and one-click export to Anki desktop.

💰 Free to start with no credit card required, stated on the homepage. A pricing page is linked from the site navigation and footer but is client-side rendered — a direct server-side fetch of /pricing returns a 404 handler — so no tier figures are exposed and none are recorded here rather than guessing. An affiliate programme is advertised.

US legal research and drafting with per-jurisdiction and per-practice-area scoping, four-layer citation verification, and a separate mode for judges and arbitrators.

💰 Research + AI Case Agents is $879/month per firm admin and covers federal authority plus one selected state, with additional states as month-to-month add-ons. The Judges, Arbitrators & Mediators plan is also $879/month per neutral and includes all state and federal jurisdictions plus Case Adjudication mode. Both include 6,000,000 tokens/month, four-layer citation verification, DOCX export and 24/7 support. A separate Full Case-Law Database + Document AI tier is $39.99/month per user for unlimited reading of every state and federal opinion plus OCR/extraction tokens and 5 GB storage. A free trial gives three queries with no credit card.

Synthetic user research for audience insight, messaging tests and landing-page A/B tests, validated at 86% across 46 studies

💰 Starter is $47/mo at launch pricing (list $79, 40% off) for consultants and SaaS teams with focused use cases, including enterprise-grade research reports and report sharing, with a 7-day free trial and no credit card. Pro is $119/mo at launch pricing (list $199) for agencies managing multiple clients, adding white-label delivery and unlimited researches. A one-time Research Pack is $29 for 2 researches with no monthly commitment, in multiple pack sizes, with no expiry.

Simulates audience reaction with networks of AI personas modeled on real people, in 24 hours instead of months

💰 No published price sheet as of July 2026 — engagement runs through a sales conversation and a booked meeting, with no self-serve tier advertised.

Open-source active-learning screening for systematic reviews, with a simulation mode for validation

💰 Free and open source, installed locally. No paid tier is offered; the project is coordinated at Utrecht University and accepts donations. Documentation, a live demo and community events are provided free.

Transcription in 50+ languages that also produces summaries, chapter breakdowns, study notes and meeting recaps

💰 Subscription Pro is $18.00/month. The annual plan is $118.80/year, an effective $9.90/month, a 45% saving. Both include unlimited credits under a stated fair-use ceiling of 500 hours a month, YouTube and file input. Switching from monthly to annual prorates the existing period and starts the annual term immediately.

AI research assistant for papers, PDFs, and documents.

R&D platform for biotech with AI insights

💰 Custom enterprise pricing for research organizations

AI-first bookmark manager with semantic and vector search, auto-tagging, per-item summaries and conversational retrieval, from $3.99/mo

💰 Hobby is $3.99/month: up to 1,000 bookmarks per month, AI-powered smart tagging, summaries and semantic search, richer AI summaries, image analysis, advanced vector search and filtering, API access, priority processing and email support. Pro is $12/month: unlimited bookmarks plus everything in Hobby — priority processing, richer AI summaries, image analysis, API access, advanced search and email support. Both plans renew automatically every month until cancelled, with no hidden fees and cancellation at any time; Pro raises limits under a fair-usage policy.

AI funding intelligence over 13,500+ tracked AI startups, with weekly deal briefings, market-gap analysis and a 7-endpoint API from $0

💰 Plans are attached to a specific API key, which you create in the dashboard before checkout. Free is $0/month for evaluation and lightweight personal use: 100 requests per day, all 7 API endpoints and community support. Pro is $49/month and raises the ceiling to 5,000 requests per day across the same 7 endpoints with priority support. Team is $199/month for 25,000 requests per day, dedicated support and custom integrations. The AI Funding Memo newsletter — weekly pre-seed and seed AI deal intelligence — is free by email and separate from the API tiers.

Personal knowledge graph from your transcripts and docs, queryable by AI agents

💰 Free is $0 forever with no credit card and no expiry, and includes up to 40 documents, ingestion of voice notes, files, web pages and YouTube, multiple brains under one account (personal, marketing, per client), tool connections and the ability to see how the brain reasons. Pro is $49/month billed annually, listed against $58/month monthly, saving 20%, and adds 60 new documents every month, all integrations including Zapier, Make, n8n, Claude Cowork, OpenClaw and the API, a biweekly knowledge-graph health check report, AI-surfaced content ideas from real conversations, blind-spot alerts, upsell and referral opportunity spotting across clients, weekly office hours and a weekly mastermind. Max is $199 today against a $600 session price, saving $400, and includes a 4-hour one-to-one build session with the founder plus the first three months of Pro at a higher 100 documents/month cap, reverting to $49/month afterwards and cancellable at any time. The session carries a guarantee of a free 2-hour follow-up or a full refund.

Peer learning community with AI homework help

💰 Free tier with ads. Plus $24/yr, Max $48/yr

Interactive STEM learning through problem-solving

💰 Free tier. Premium $10.99/mo (annual), Family $24.99/mo

AI-powered education platform for essays, math, coding & studying

💰 Limited free access. Premium $14.99/mo or $99.99/year

Legal research with AI assistant CoCounsel

💰 CoCounsel starting at $500/user/mo

Competitor tracking across sites, emails, ads, news and SEO with an AI agent and a competitor-finder API, from $33/month annually

💰 Two self-serve plans, monthly or yearly with two months off. Focused is $39/month, or $33/month billed yearly: monitor up to 5 competitors daily, unlimited use of the Champ AI agent and a 30-day money-back guarantee. Competitive is $99/month, or $83/month billed yearly: everything in Focused, up to 15 competitors monitored daily and priority customer service. A custom option is available on contact for custom limits, dedicated support and tailored onboarding. Both plans start with a 14-day free trial, cancellable anytime with no questions asked, and carry a 30-day refund. The Competitor Finder API is priced separately and pay-as-you-go at $0.10 per competitor returned.

Chat with 10-K/10-Q filings and earnings calls across 3,000+ US companies, with cited answers, from $11.90/month

💰 Free is $0 and grants 20 credits on registration that do not reset, basic feature access, selected financial reports, earnings calls and news, financial data for the last 10 years and 6 quarters, and fundamental analysis rankings for up to 10 companies. Pro is $14.90/month, or $11.90/month on an annual subscription at $142.80/year (a stated $36 saving): 1,000 credits monthly, all financial reports, earnings-call transcripts for the last 10 quarters, all curated news, 15 years and 20 quarters of financial data, rankings for up to 500 companies, agent-driven fundamentals and sentiment analysis, and chat over report content. Max is $22.90/month, or $15.90/month annually at $190.80/year (a stated $84 saving): 2,000 credits monthly, all earnings-call transcripts, 30 years and 40 quarters of data and rankings for all covered companies.

Chat with any PDF — ask questions, get summaries, and extract key info in seconds

💰 Free (2 PDFs/day, 120 pages, 50 msgs/PDF). Plus $19.99/mo (unlimited PDFs, 2,000 pages, GPT-4o).

AI-powered homework help and study platform.

Generates personalised programming courses from the concepts you struggle with while coding alongside AI

💰 Free is £0 and includes 3 courses per month, suggested courses, comments and the AI Explain feature. Pro is £15/month for developers shipping daily and includes everything in Free plus 12 courses per month and priority support. Ultra is £40/month and includes everything in Pro plus unlimited courses. Pricing is quoted in pounds sterling on the vendor's own pricing page. Courses are created on demand — the vendor states that when your coding assistant notices you struggling with a programming concept, Chestnut proactively creates a course on that topic.

Deterministic legal citation verification with a published false-verify rate

💰 Free: 3 verifications per month, no card. Solo $29/mo for 30 docs, including a $100 fabrication warranty and a $10,000 sanctions guarantee. Professional $79/mo for 150 docs with a priority queue and a $200 fabrication warranty. An entry paid tier starts at $12/mo. Annual billing saves 20%.

Checks whether citations in a text actually exist and finds original sources across CrossRef, PubMed, arXiv and Scholar

💰 Four options published on the pricing panel. Trial is $9 once for 15 credits, Find Source up to 300 characters and Verify References up to 2,000 characters. Monthly is $19/month for 150 credits/month with verification up to 4,000 characters and advanced source verification. Yearly works out at $14/month billed annually for 1,500 credits per year. Believer is $347 once for 5,000 credits and three years of access. Exports cover APA, MLA and Chicago on paid tiers.

Agent-native notebook that finds data, writes cells, provisions GPUs and runs experiment branches from a prompt

💰 Usage-based with four published tiers plus Enterprise. Free is $0/mo: the Auto model for fast low-cost everyday work on a CPU sandbox with 8 vCPU and 8 GB RAM. Plus is $30/mo, adding open models (DeepSeek V4 Pro, Kimi K3, Qwen3.8 Max), entry GPUs (T4, L4, A10) up to 24 GB VRAM, up to 32 GB sandbox RAM, a monthly usage allowance and optional pay-as-you-go beyond it. Pro is $90/mo for every model including Claude Sonnet and Opus and GPT, mid-tier GPUs (L40S, A100) up to 80 GB VRAM, up to 64 GB sandbox RAM and at least 4× the Plus allowance. Max is $200/mo with all models and GPUs unthrottled, H100 and H200 up to 141 GB VRAM, up to 128 GB sandbox RAM, at least 12× the Plus allowance and priority capacity. Enterprise covers higher limits, dedicated capacity and SSO.

Socratic coding tutor that teaches your own codebase step by step and refuses to write the code for you

💰 Free tier: an open-source skill on GitHub where your code never leaves your machine, plus lessons built from any public repo URL. Pro from $24/month adds a managed tutor; in repo mode it runs against your own checkout on 127.0.0.1 with edits landing in your real branch. Team pricing via Talk to sales. Secrets and gitignored files are never read on either tier. Currently in beta.

Agentic compute platform giving each agent a persistent cloud computer, projects, memory, skills and subagents

💰 A subscription unlocks the platform and usage is metered separately in USD with included credits applied first; monthly and yearly billing are both offered. Sandbox is $0/month with a $1 one-time usage credit, a default agent and files, one constrained cloud computer, and run estimates and usage history. Builder is $24/month with a $5 monthly usage credit, custom agents and Projects, Imagine and Metronome workflows, evaluations, guardrails and fine-tuning, cloud computers and developer resources, plus tags, schedules and API access. Team is $79/month with a $15 pooled monthly credit, three builder seats, unlimited operators and viewers, shared agents/projects/computers, squads, roles and pooled billing, bring-your-own inference endpoint, and additional builder seats at $15/month. Business is $249/month with a $40 pooled credit, ten builder seats, audit logs and approval policies, SAML SSO and SCIM, service accounts and org analytics, priority support, and extra seats at $12/month. Enterprise is quoted separately.

Turns PDFs, notes or long chat transcripts into teachable concept maps with a node-by-node Present mode

💰 Free forever: up to 10 AI credits a month on fast chat models (Gemini Flash, DeepSeek), roughly 10 maps. Pro is $15.90/month for 500 credits a month, roughly 500 maps, on premium models including Claude, GPT-5, Gemini Pro and Grok. Max is $49.90/month for 5,000 credits a month. Five maps can be made with no signup.

Visual graph of connected research papers

💰 Free tier 5 graphs/mo. Premium $7/mo unlimited

AI search for scientific research papers

💰 Free tier. Premium $8.99/mo, Enterprise custom

Save, summarise and chat with web articles, PDFs and YouTube videos in one permanent library

💰 Free is $0/month with 3 AI summaries, 1 PDF, 1 web article, 1 YouTube video, 20 AI chat messages and 3 image generations per month. Plus is $9.99/month, or $7.99/month on annual billing which the site quotes as a 60% saving, with unlimited AI summaries, unlimited TLDRs, unlimited key takeaways, unlimited AI chat messages and 1,000 image generations per month. A Lifetime plan gives the same unlimited access for a one-time $199.99, discounted to $99.99. The product is operated by Basement Labs LLC.

The most-installed Obsidian AI plugin — cited vault search, projects, composer diffs, and any model you like

💰 Free tier is BYOK with no sign-up or license key, covering all free and open-source features, image support on vision models, a local data store for Vault QA, and Markdown-only context — but no AI agents or tool use, and community support only. Plus is $14.99/month, or $11.67/month billed annually at $139.99/year, adding a built-in copilot-plus-flash model, smarter multilingual vault search, a web-searching agent with long-term memory, YouTube and X ingestion, per-project context, 50+ file types including PDFs and EPUBs, and a private Discord. A Self-Host Supporter tier is $349.99 for lifetime self-host access plus two years of Plus.

Online courses from top universities and companies

💰 Audit free. Coursera Plus $59/mo, individual courses vary, degrees from $9,000

AI lesson generator with interactive student engagement

💰 Free for teachers. Premium plans for schools and districts

White-label AI market-research and validation reports for agencies, fully sourced with inline citations, exportable to PDF, Word or an API

💰 Four subscription tiers, priced per month billed annually, saving over 25% versus monthly. Starter is $14/mo: 2,500 credits per year, unlimited report templates, 100 sections per report and 60 source searches per report. Pro is $44/mo: 9,300 credits per year, 2 team members, API access and white-label client reports and landing pages. Agency is $112/mo: 30,800 credits per year, unlimited team members, white label, API access, one hour of expert consultation per month and priority support. Enterprise is $299/mo: 2 done-for-you report templates, 98,000 credits per year, unlimited team members, white label, a managed custom domain, API access, three hours of monthly consultation and priority support. On-demand credit bundles: 300 credits for $49 one-time, 850 credits for $99 one-time. An affiliate programme pays 50% commission.

AI-native browser from Browser Company with contextual intelligence

💰 Free to download and use

One-time, citation-backed startup validation reports with comp sets and unit economics, from $9

💰 All tiers are one-time purchases with no subscription and credits that do not expire. Free: a four-dimension idea score (market size, competition, timing, execution) in about two minutes, unlimited submissions, no credit card, personal use only. Starter $9: a seven-section validation read covering business overview, user pain points, revenue and market, monetization, kill-risks, timing and execution path, with three named comparable companies and three concrete execution recommendations, upgradable to the full report at any time. Entrepreneur from $129: the full 150+ page report with a complete comp set and source-linked retention benchmarks, unit-economics breakdown and cohort analysis, risk register with mitigation paths, investor-memo skeleton, idea fine-tuning, a custom-branded PDF and commercial use. 3-Pack $179: three full Entrepreneur reports, stated as saving $208 against buying three singles. Enterprise is custom-priced with bulk discounts, revenue share, white-label hosting, API access and priority processing. A 14-day satisfaction guarantee applies with no forms or support tickets required.

AI-scored expired .com domain database with a 0-100 brandability rating and Gold/Silver/Bronze tiers

💰 Two published subscription tiers with a monthly/annual toggle advertising up to 36% off on annual plans. Domainer is $19/month and provides access to 99% of DroppedHub's domains, availability status checking, watermarked domains, the radio test, historic data and daily updates. Investor is $79/month and provides access to 100% of the database plus everything in Domainer. Account creation is required to browse beyond the homepage samples.

AI-powered language learning with GPT-4 features

💰 $29.99/mo or $167.99/yr on top of Duolingo Super

Forward a WhatsApp voice message and get a transcription and summary back in the same chat, in 90+ languages

💰 Two plans, both with a trial and both discounted from list. Personal is $27/month (list $47) for unlimited voice messages and summaries, audio up to 3 minutes long and 200 monthly minutes. Pro is $97/month (list $120) for unlimited messages and summaries with audio up to 20 minutes long and higher monthly limits. Audio-file and video transcription are included on the newer tiers.

AI research assistant for literature reviews

💰 Free tier. Plus $10/mo, Pro $42/mo for researchers

100+ CEFR-mapped English grammar lessons with 550+ exercises and an AI coach that explains mistakes

💰 A free tier and two paid plans, currently on launch pricing that the vendor states drops Pro from a $19/mo list price, with a 7-day money-back guarantee and cancellation at any time. Free is $0 forever with no credit card required and includes all Pre-A1 and A1 sets, the first two sets in every category topic, one free sample topic per CEFR level, 5 AI Coach credits per day, and streaks, badges and the leaderboard. Pro is $2.00/month billed annually at $24/year (against a $48/yr list price), which the vendor equates to $0.07 a day, and unlocks all sets in every category topic from set 3 onward, all A2 to C1 sets by CEFR level, an ad-free experience, AI-powered weak-area detection, 1,000 AI Coach credits per month, 3 streak freezes per month and unlimited result emails. Max is $4.00/month billed annually at $48/year (against $84/yr), adding 3,000 AI Coach credits per month, permanently saved AI conversation history, 5 streak freezes plus streak repair, and early access to new features. All paid plans include direct founder support with a stated 24-hour reply.

Highlight a confusing passage in a paper and get a plain-language explanation, with math and figure support on Pro

💰 Free is $0 per month, free for everyone forever, with unlimited highlight explanations, follow-up questions, Zotero library import and basic AI models. Pro is $16/month with a 7-day free trial, adding advanced AI models, Math Explain for formulas and figures, whole-paper summaries, saved highlights and explanations, and questions about the paper. Yearly billing saves 25%. Teams is quoted on request and adds team management, priority support and volume discounts. All plans bill through Stripe.

Universal AI second brain — captures web clips, PDFs, and notes into one searchable, AI-powered workspace

💰 Free (limited storage). Plus $10/mo, Pro $20/mo

Fact-verification API returning confidence-scored verdicts with cited sources, for grounding LLM output

💰 Credit-metered, monthly or yearly with 2 months free on annual. Free is $0 with 100 one-time welcome credits, no credit card, up to 1 collection and 5 uploaded sources. Pay As You Go is $0.01 per credit with no commitment. The subscription ladder is Project at $30/month for 3,000 credits ($0.010/credit, up to 5 collections and 100 sources), Bootstrap at $100/month for 12,000 credits ($0.0083), Startup at $220/month for 30,000 credits ($0.0073) and Growth at $500/month for 75,000 credits ($0.0067), with Enterprise custom-quoted. Credit costs are published per action: Fact Search is 1 credit, Fact Checker 2, Evidence Finder 2, Deep Research 2, Timeseries 3, Causality Graph 3, Fingerprint Embed 2, Fingerprint Detect 1 and Fingerprint Report 1.

AI tax research assistant grounded in IRC Title 26, Treasury Regs and IRS rulings with a citation on every line

💰 Pro is $99 per user per month with a full 7-day free trial that requires no credit card, and three sample questions can be tried instantly without an account. Pro includes audit-ready citations on every answer across IRC, Treasury Regulations, Revenue Procedures and Private Letter Rulings; internal, client and executive memo drafting with linked citations; federal and state knowledge bases updated weekly; unlimited chats and message history; the Safe encrypted client document vault for 1099s, K-1s, W-2s and full filings; email and cloud-drive intake from Drive, Dropbox, OneDrive and Box; firm-wide sharing of chats, files and projects; and priority support. Enterprise is custom-priced for firms of 10 or more. Cancel anytime.

Agentic AI browser that automates complex web tasks and deep research

💰 Free tier available. Premium plans with expanded capabilities

AI scientific figure generator: graphical abstracts, PRISMA, CONSORT, Kaplan-Meier and volcano plots as journal-ready vectors

💰 Monthly, yearly and one-time options; yearly is shown by default with roughly 20-24% off. Starter is $15/month, discounted to $12/month, granting 20,400 credits per year — about 680 figures at $0.21 each. Pro is $29/month, discounted to $23/month, granting 50,400 credits per year — about 1,680 figures at $0.16 each. Max is $59/month, discounted to $45/month, granting 126,000 credits per year — about 4,200 figures. All paid plans include access to every model and style, a commercial use licence, a permanent figure library, auto-refund on failed generations and invoices with an institutional tax ID. Several individual generators are free with no signup.

AI grading for handwritten K-12 maths, with misconception tracking and class analytics

💰 Free is $0 forever with no credit card and no expiry: up to 50 worksheets/month, handwriting recognition with step-level feedback, capture from phone, document camera or scanner, a live class dashboard, and FERPA/COPPA/SOC 2 Type II compliance. Pro is $16.67/month billed at $200/year (saving 33%, with a 14-day trial and a fall back to Free on cancellation) and raises the limit to 1,000 worksheets/month, adding step-level explanations, custom feedback styles, class and student analytics, misconception tracking, custom rubrics and grading scales, and email support with a 24-hour response. Institution is custom-priced on an annual invoiced contract for schools, districts and charter networks, adding unlimited worksheets, everything in Pro for every teacher, school and district admin dashboards, standards alignment across CCSS, TEKS, NGSS and 30+ state frameworks, Google Classroom and Canvas integration, SSO/SAML and Clever/ClassLink rostering, equity and standards reporting, a dedicated success manager and a custom DPA. Typical institutional setup is stated as under 48 hours.

AI forecasting engine with a public Metaculus and real-money track record, priced per question

💰 Free tier starts with $20 in credit, no card, 10 concurrent researchers, all operations and API access. Analyst Starter is $20/month with 20 concurrent researchers and 15% off usage rates; Research is $99/month (half off the first month for new subscribers) with 40 researchers and 30% off usage; Expert is $500/month with 80 researchers and 30% off usage. Usage is charged per question on top: roughly $2–$5 for a high-effort forecast, $0.25–$3 for a low-effort one, $0.30–$4 per multi-agent row and $0.03–$0.30 per agent-map row. Top-up credit can be bought in any amount, is good for a year and does not reset monthly like the plan allowance. Enterprise and volume pricing on request.

Scan 11 app ecosystems for demand, weak competitors and missing integrations from inside Claude Code, $49/mo or $99 one-time

💰 Launch pricing. Unlimited Monthly Subscription is $49/month: all 11 ecosystems, Claude Code MCP integration, 13 AI-powered discovery tools, AI-extracted pain points from real reviews, 6-area deep research (market, competition, revenue, technical, keywords, GTM), build/skip/maybe verdicts, opportunity pipeline and saved queries, unlimited API access and weekly data refreshes — and it converts to lifetime access after 4 payments, with cancellation allowed at any time. Bundle Lifetime Access is $99 one-time for any 5 ecosystems with API access capped at 100 requests per hour, upgradeable later. Unlimited Lifetime Access is $199 one-time for all 11 ecosystems with unlimited API access. All lifetime purchases include weekly data refreshes.

Desktop AI research assistant covering idea discovery, manuscript drafting, systematic reviews, meta-analysis and patent disclosures

💰 One paid plan with two billing periods: Pro at $19.99/month, or the yearly Pro plan saving 33%. Both give unlimited hypothesis generation, paper generation, patent disclosure drafting and SLR/meta-analysis, three desktop device activations, web access and 2,000 plugin credits per month. Desktop-exclusive OpenAI, Anthropic and Google model options require your own API keys (Tier 2 or higher recommended); the Hybrid service has token costs covered by the vendor. Card subscription or non-recurring WeChat Pay (RMB only, plus 13% VAT). 1-day free trial, no payment method needed.

Bioinformatics software for genomics

💰 Prime $95/mo, Biologics $175/mo. Annual and academic discounts available

AI search and agent platform with autonomous research and content creation

💰 Free tier (200 credits/day). Plus $19.99/mo, Pro $24.99/mo

AI-moderated user interviews that run autonomously and return tagged, quantified insights

💰 Signup is free to start. There is no /pricing page on the site (it returns 404), so no tier pricing is published — larger use is routed through the team rather than a published rate card.

Web and PDF highlighter with a social discovery layer, AI chat over your library and auto-sync to Notion.

💰 Free $0 with unlimited public highlights and no credit card required. Pro $12.50/month, or $150/year billed annually against a $180 monthly-equivalent, adding private highlights, chat models and daily auto-sync/export to Notion. Unlimited $30/month, or $360/year billed annually against $432, for unlimited private highlights. Yearly billing gives two months free.

Open-source autonomous research agent — plans subtopics, gathers sources, writes a cited report

💰 Free and open source under the MIT licence. The vendor states plainly that there is no SaaS subscription, no API gateway and no rate limit imposed by the project — you self-host the agent and pay only your underlying LLM and search-API providers directly. Per-query cost therefore depends on your choices: the LLM provider (GPT-class, Claude Sonnet, Gemini, DeepSeek or a local model), the retriever (Tavily, Bing, Google CSE, or free options such as DuckDuckGo and SearXNG), and the configured number of subtopics and iterations, with defaults targeting 10 to 30 sources. The project's own indicative ballpark for a single deep-research run on default OpenAI plus Tavily settings is a few cents to a few dollars of provider spend. There is no first-party hosted SaaS; managed VPC deployments, private-corpus retrievers and SLAs are handled by direct arrangement with the maintainer.

Rubric-aligned AI grading for K-12 including handwritten, math and oral work, with state-standards coverage

💰 Billed monthly or annually with 26% saved on annual. Free is $0 with no credit card: 100 submissions per month, every assignment type available for trial, Google Classroom integration, handwritten assignment support, rubric upload plus AI-generated rubrics, six feedback styles and help centre access. Lite is $14/month billed annually: everything in Free plus 300 submissions per month, writing, presentation and art grading, a student image submission tool, a standards-aligned rubric library and email support, with optional add-ons of extra submissions from $4 one-time, all assignment types at +$6/month and performance analytics at +$8/month. Pro, marked most popular, is $26/month billed annually: everything in Lite plus unlimited submissions, quizzes, exams, problem sets and worksheets, video and audio grading, performance analytics included, a shared assignment and rubric library, training and onboarding, and priority 24-hour support — the page notes this is 28% cheaper than Lite with every add-on stacked. School and District pricing is custom with volume discounts, adding Canvas and Schoology integration and admin tooling.

AI writing assistant for students

💰 Education pricing for schools and universities

AI knowledge base — generate and explore wiki-style explanations on any topic

💰 Free tier available. Premium plans for unlimited generation and storage.

AI-powered course creation platform for creators and coaches

💰 Basic $19/mo, Pro $49/mo, Business $119/mo. No transaction fees.

Chat with PDFs and documents — get cited answers from your files

💰 Free (60 pages/mo), Student $1.99/mo (200 pages), Expert $9.99/mo (unlimited).

AI note taker for meetings, audio, PDFs and YouTube with templated summaries and study tools

💰 Free forever: audio recording and transcription up to 120 minutes per session, professional templates, uploads from any source, sync across web, mobile and tablet, calendar integration and private storage, with no credit card required. Pro is $6.66/month billed as $79.99/year and adds 1,200 transcription minutes per month, 300 one-time podcast, slides and infographic credits, high-accuracy note translation and transcript export, with a 7-day free trial. Plus is $10.83/month billed as $129.99/year and adds 1,200 minutes of real-time audio transcription per month on top of Pro. Annual billing is advertised at 45% off. Auto-renews annually; cancel any time.

Turns any text into a knowledge graph to reveal topical clusters and, more importantly, the structural gaps between them — with an MCP server for GraphRAG.

💰 A pricing page exists and plan detail renders client-side; no figures were reachable at the time of verification. Confirm current tiers on the vendor's pricing page.

Simulates role-specific job interviews from your CV and a job description, as an HR screener or hiring manager, sold per simulation

💰 Free is €0 and includes 1 interview simulation (1 credit, capped at 12 questions), with all interview types, all stages and both HR and hiring-manager personas. Growth is €10 for 5 interview simulations. Best Value is €19.20 for 12 interview simulations. Credits never expire and paid credits stack on top of the free credit. No credit card is needed to start.

Builds an interview dossier from a job link and runs real mock interviews with a human coach

💰 A free tier and three subscriptions, each currently advertised at 50% off the first month, with no auto-charges — the vendor states you renew when you choose. Free is $0 and covers your first 3 interview dossiers built from job links, tailored CVs with ATS analysis and an application kit, LinkedIn profile optimisation, interviewer research on the panel, daily job matches scored against your CV, and free out-loud practice via ChatGPT using your dossier; coach classes are sold separately at $9.99 each. Monthly is $9.99/month, $4.99 for the first month, and includes 1 real mock interview with a coach plus unlimited dossiers, tailored CVs and LinkedIn re-runs, with extra classes at $9.99 each. Pro is the most chosen tier at $19.99/month, $9.99 for the first month, and includes 3 real mock interviews with a coach with real pressure, follow-ups and a written report. Intensivo is $39.99/month, $19.99 for the first month, and includes 5 real mock interviews with same-week booking between 7:00 and 23:00 Spain time. A standalone 20-minute coach simulation is $9.99.

Enterprise AI knowledge foundation for regulated industries

💰 No published pricing. Demo-gated enterprise contracts scoped against data volume, integrations and governance requirements. No self-serve tier for individual researchers.

Premium ad-free search engine with AI features

💰 Starter $5/mo (300 searches), Professional $10/mo (unlimited), Family $14/mo

AI tutor from Khan Academy

💰 $9/mo for students, $4/mo for teachers (part of Khan Academy membership)

AI tutor by Khan Academy using the Socratic method.

A 20,000-question USMLE Step 1 bank with worked explanations at $19/month, built for international medical graduates

💰 Free trial is $0 with no card: 20 bank questions with a full worked explanation on each, access to the public practice library and 10 AI question generations per day. Exam Pro is $190/year (≈$15.83/month, billed yearly) or $19/month on monthly billing, with two months free on the yearly option: 1,000 bank questions every month drawn from the 20,000+ question library across 32 specialties, a worked explanation on every question, seen-question tracking so sets stay new, specialty filtering and priority email support. Students on a budget are invited to contact the vendor about a discount. Pricing is stated in USD.

A local-first, MIT-licensed desktop thinking tool for macOS and Windows that connects your reading, notes and conversations into finished work, running on your own API keys or local models.

💰 The desktop app is free and open source under MIT for macOS and Windows, using your own OpenAI or Anthropic key, a Claude Code or Codex subscription, or local models via Ollama. A Pro Cloud tier adds cross-device sync, built-in frontier models with no API keys and an included AI allowance with optional top-ups, and starts with a 7-day free trial requiring no credit card. The Pro Cloud plan table is rendered client-side and no monthly figure is exposed in the served HTML, so no price is recorded here.

A local-first desktop research workspace that plans the analysis, cites material claims and keeps a decision record — free tier, Pro $149/year

💰 Explorer is free: a local workspace with core analysis, 1 active project, 15 files or research papers, 20 notes and 1 table, indexing and grounded chat, plan generation, 1 saved output, and all AI providers via your own keys. No account is needed — the download starts right away. Pro is $149/year and adds unlimited projects, files, notes and tables; the two-model critique pass (beta); unlimited saved outputs; export to PDF and Markdown; full decision history with source links; and priority support. Korvo does not resell model tokens — cloud provider API usage is billed separately by whichever provider you choose. macOS is stable; Windows and Linux are alpha; iPhone and iPad are TestFlight by request.

Research memory that captures sources as you browse and surfaces them mid-meeting, with cited retrieval and MCP connectors

💰 Three tiers: Explorer free with 200 saved documents, 10 local uploads per day, 3 composer uses, basic recall, 30 days of chat history and up to 10 meetings saved with Magnet. Pro at $29 per month with 10,000 saved sources, 100 local uploads per day, advanced recall with fact-check and gap detection, unlimited Magnet meetings, model selection, 24 months of chat history, MCP connectors and agents, and collaboration with up to 10 people per project. Team at $50 per user per month with unlimited sources and uploads, a shared team knowledge base, sharing with up to 50 people per project, workflow integrations including Drive and Granola, advanced models, custom onboarding and a dedicated support channel. Teams over 50 are quoted directly.

AI research assistant that highlights, annotates, and synthesizes web content and PDFs

💰 Free tier with limited AI features. Premium from $8.33/mo for unlimited AI research.

Production web search API for AI — sub-second cited search, page fetch and async deep research

💰 Pay as you go and priced per request rather than per seat, with 4,000 queries free to start. Fetch, for URL content extraction, is $0.001 to $0.005 per request at under two seconds latency, synchronous. Search, for web search tool calls from AI agents, is $0.005 to $0.006 per request at one to three seconds latency, synchronous, and comes in Fast, Standard and Deep variants. Research, for asynchronous deep research, is $0.25 to $2.50 per request with latency from one to ten minutes. SOC 2 Type II is included on all plans; zero data retention is available on the Enterprise plan, which also covers in-your-own-cloud deployment. There is no monthly platform fee published — the request price is the price.

Source-based AI writing partner — 100M+ source citation tool, AI detector, plagiarism check

💰 Two published tiers with no credit card required to start, plus a separate contact-priced team and enterprise track. Free is $0 per month and includes limited daily AI commands and AI output, unlimited use of the legitimate source finder, unlimited citation tool and formatting, the AI companion and the AI detector. The paid plan starts from $7.90 per month if billed annually — the vendor markets this as 60% off — and includes the unlimited AI outline and drafting tool, unlimited AI output and AI commands, unlimited source finder, unlimited citation tool and formatting, the AI companion, the text humanizer, the plagiarism checker and unlimited built-in ChatGPT. A separate Team & Enterprise pricing page is offered for institutions.

Meta's open-source LLM for research and commercial use

💰 Free to download and use. Available on cloud providers at various inference costs

Spaced-repetition exam prep from your own notes, slides and photos — one-time purchase, no subscription

💰 One-time purchases for a fixed access window, with no subscriptions, no auto-renewal and no rebills; you can renew after the window to keep your data if an exam is postponed. Free runs 7 days at $0 with no credit card: 1 project, 1 document up to 5MB, 1 web page up to 10k tokens, the full study plan and spaced-repetition program, and up to 30 chat queries against your material. Basic is quoted at $12.00/month and billed once at $48.00 for 4 months: 3 projects, 3 documents up to 49MB each, 5 web pages up to 100k tokens each and unlimited chat with your material. Pro is quoted at $24.00/month and billed once at $96.00 for 4 months with higher limits. A 12-month Continuous Learning window is sold on the same one-time basis, with published figures including $7.00/month at $84.00 for the year and $10.00/month tiers.

Turn YouTube, PDFs, and any content into AI-generated mind maps instantly

💰 Free tier available. Pro plans for advanced features

AI that converts handwritten and printed math to LaTeX.

💰 Free tier with 10 PDF pages/month and 10 images/month (doubled with .edu email). Pro $4.99/mo (1,000 pages/5,000 images). Organization $9.99/mo. Enterprise custom pricing.

AI math solver with step-by-step explanations

💰 Free answers. Premium $9.99/mo for step-by-step solutions

GPT-4 powered Chrome extension for email, summaries & research

💰 Free tier with 51 queries/day. Starter $14.25/mo, Pro $35.10/mo, Team $54/mo

AI-native authoring, LMS and governance in one platform, with SCORM export and an MCP server for Claude or ChatGPT

💰 Priced in euros with a stated 10% discount on yearly billing. Free is €0 forever: 1 admin plus 1 free seat, starter AI credits, and full platform access for a team of two — Mexty AI Chat, interactive activities, course builder, users and roles, tools and workflows, and HTML/SCORM export. Creator is €9/month: 1 seat scaling to 10,000, 50 credits per month, €0.16 per extra credit, plus the Mexty MCP server for Claude or ChatGPT, unlimited courses and reusable blocks, transparent seat tier pricing and priority email support. Pro is €29/month: 5 seats scaling to 10,000, 200 credits per month, €0.14 per extra credit, plus learning paths (study programs), people chat, custom role permissions and adaptive AI learning. Enterprise is custom-quoted for 10,000+ users with on-premise or private cloud deployment, SSO and custom integrations, dedicated support and SLA, and volume seat and credit pricing. Seat add-ons are published: on Creator, 10 seats is +€20/month, 50 is +€70, 100 is +€120, 200 is +€190 and beyond that +€50 per 100 seats.

AI study assistant turning lectures into notes, flashcards, quizzes, and an AI tutor

💰 Free study sessions available. Premium plans for unlimited access

AI-native eLearning authoring tool that turns source material into interactive, SCORM-shareable courses with storyboard control

💰 Priced per author, monthly or annually with annual advertised at 20% off. Educators receive 30% off and learners are always free. Free is $0/month with 450 one-time AI credits at signup, unlimited content and sharing, link, embed and SCORM sharing, lesson creation and editing, and a 'Built with Mindsmith' badge. Professional is $39/author/month (billed annually at $468/year) with 2,000 AI credits per author per month, badge removal, audio narration and text-to-speech, ElevenLabs integration, custom branding and theming, scenario generation and engagement metrics. Business is $65/author/month.

AI Chrome extension with GPT-4 for writing, translation & research

💰 Free tier with daily limits. Pro $9.90/mo, Pro+ $19.90/mo, Unlimited $24.90/mo

30+ student writing tools behind one subscription, with cited essays in APA, MLA, Chicago and Harvard

💰 A free trial requires no credit card and covers the AI essay writer up to 1,500 words per month with built-in APA, MLA, Chicago and Harvard citations plus originality and AI-detection checks. Starter is $9.99/month (stated saving of $19.92/year on annual billing): 50,000 words per month — described as about 30 essays — 15,000 humanized words, unlimited AI detection checks, plagiarism checks on 10 essays, all 30+ tools, export to Word, PDF or Google Docs, saved and re-editable essays and email support. Writer is $17.99/month ($36.00/year saved): 150,000 words per month (about 90 essays), 75,000 humanized words, plagiarism checks on 20 essays, plus a research assistant with scholarly sources, chat with PDF uploads, tone and structure control, priority generation speed and priority email support. Unlimited is $24.99/month ($50.04/year saved): unlimited essay generation, humanizing, AI detection and plagiarism checks, plus advanced research insights, bulk essay generation, priority chat support and early access to new tools. All tiers carry a 7-day money-back guarantee and cancel anytime.

Multi-model AI sidebar and Gmail extension — one subscription across several model families

💰 Three published tiers with a 7-day free trial on each and 15% off on yearly billing; the vendor describes the model as usage-based with no upfront commitment. Pro is $9 per month for 1,500 queries per month on a single individual seat with full feature access. Unlimited is $19 per month for unlimited queries across 3 team seats. Team is $99 per month for unlimited queries across 10 team seats. All three tiers carry the same feature set — the AI email assistant, Gmail extension, sidebar copilot, LinkedIn tools, summarisation, writing toolkit and coding tools — so the differences are query volume and seat count rather than capability. The vendor publishes no permanently free tier.

Infinite-canvas visual workspace where nodes hold notes, files and evidence, with AI mind maps and video/doc summarisation from $4/month

💰 Free is $0 with 1 workspace and 2 documents and no AI credits, which disables AI mind maps, document and video summarisation and AI chat. Premium is $4/month with unlimited workspaces, unlimited documents and 500 AI credits per month covering AI mind maps, document and video summarisation and AI chat; a free trial is offered on this tier. Annual billing is advertised as saving more than 30% and is charged as a single payment for the year. Teams is custom-priced and includes everything in Premium plus a custom CNAME, own-logo branding and premium support. Activation codes are accepted at checkout.

Open NotebookLM alternative on your own keys and storage — cited answers, podcasts, flashcards, and an MCP-connected library

💰 Free tier: save sources free with no card. Monthly $5/month, which covers AI and service usage — source fetching and storage past the included 5 GB — with pay-as-you-go beyond that capped by a budget you set (defaults to $0). Yearly $50/year, same deal with two months free, billed once as $50 of AI credit for the year. Bring your own AI keys and your own S3-compatible storage to reduce metered usage. Everything is included on either plan; cancel anytime and your data leaves with you.

Free open-source read-later app with AI summaries and Obsidian integration

💰 Completely free. Open-source. Self-host or use the hosted version at no cost.

Writes and illustrates original children's stories from a one-line idea

💰 The monthly plan is $9/month. The annual plan is billed yearly at a 33% discount, working out to $6/month. Both unlock the paid-only genre presets — western, Seuss, epic, poem and mystery — and preview access to upcoming features. A Commercial License tier is $19, quoted on the page as $29.00/month or $19.00/month with an annual subscription. A separate Commercial plan at $50/month adds dedicated support and infrastructure for company use. The company donates 3% of subscription revenue to removing CO2 from the atmosphere.

Open-source, self-hosted AI research notebook with podcast generation and full model control

💰 Free and open source, self-hosted. No paid tier or hosted plan is advertised; model costs are whatever you incur with the providers you configure, and local models incur none. Support runs through GitHub and Discord.

Weekly research reports built only from primary sources you pick, with change tracking against the previous report and every claim cited

💰 7-day free trial on every plan, with a reminder before billing and one-click cancellation. Starter is $33/month for solo founders tracking one market, with 2 research themes, 10 official sources per theme, a weekly report per theme, change tracking against the previous report, every claim linked to its source and 1 instant baseline report per month. Pro is $65/month for founders, consultants and analysts tracking multiple markets, competitors or regulatory areas, with 5 research themes and 30 official sources per theme. Taxes may apply.

AI research assistant that summarises PDFs, video, podcasts and spreadsheets in one writing workspace

💰 Free is $0 with limited monthly chats and a basic PDF viewer. Lite is $7/month ($84/year) and adds agentic AI. Go is $18/month ($216/year) with roughly 3x the chat and research capacity and all AI models. Pro is $45/month ($540/year) with roughly 10x capacity for daily research. Yearly billing is advertised at 50% off. Separate Business plans are available.

AI academic writing assistant for researchers — grammar, citations, journal readiness, and manuscript polish

💰 Free (200 AI suggestions/mo). Prime $19/mo or $99/yr (unlimited). Teams and institution pricing available.

Spreadsheet-shaped agent platform for parallel research and data enrichment

💰 Individual is $200/month billed annually and includes 20,000 credits total, top-ups at the standard rate, and a single seat with no team features. Business starts at $1,000/month billed annually, includes at least 100,000 credits, top-ups at a discounted rate, database and CRM integrations, and unlimited team seats. Enterprise is custom-priced and adds custom credit limits, a custom seat count, full role-based access controls, domain auto-verification, SAML/OIDC SSO, custom data sources, advanced team analytics, a dedicated account team, in-depth onboarding and optional tenant isolation. Annual billing saves 20% against monthly. Credits are consumed per cell run and vary by task complexity; the vendor publishes an estimation guide because of that.

Conversational AI surveys that ask adaptive follow-ups, accept spoken answers and auto-code the free text into themes

💰 Three tiers: Free at $0/month with up to 3 surveys, 100 responses per month and basic analytics. Pro at $49/month, marked popular, with unlimited surveys and 1,000 responses per month. Enterprise is custom-quoted with unlimited everything, dedicated support and custom branding. The /pricing path 404s; these figures are transcribed from the 'Simple, transparent pricing' block on the homepage itself.

Chat with PDFs where every answer cites and highlights the source page, free at 3,000 tokens/month then one $12.99 plan

💰 Two tiers only. Free is $0 forever with no card: 3,000 tokens per month, 5 PDF uploads, a maximum of 100 pages per PDF, AI summaries, basic chat and community support. Pro is $12.99/month, currently discounted to $10.99/month as a limited-time 15% offer: 30,000 tokens per month, unlimited PDF uploads, up to 2,000 pages per PDF, advanced AI summaries, unlimited chat sessions and priority support. The in-browser live demo requires no sign-up at all and accepts files up to 5MB. Documents are encrypted at rest and the plan is cancellable at any time; unused token rollover policy is documented in the vendor's FAQ.

Chat with PDFs — statements, contracts, resumes, manuals — with a large free tier and a one-time lifetime option

💰 Free: $0.00/month, 1 PDF, max 10 MB and 200 pages per PDF, up to 200 questions per day. Unlimited plan: $14.99/month, discounted to $10.49/month on annual billing, for unlimited PDFs, unlimited questions, no page limit and priority support. A limited-time lifetime deal is listed at $599 reduced to $420 one-time, covering the Unlimited plan plus all future updates. Enterprise is contact-us.

Scan and solve math problems with explanations

💰 Free tier. Plus $9.99/mo with detailed explanations

Podcast transcription from an Apple, Spotify, iHeart or RSS link, with AI summary, chapters and SRT/VTT export

💰 Credit-based, where 1 credit equals 1 minute of transcription with no multipliers or rounding. Signing up grants 30 free credits, roughly 30 minutes, with no credit card. Subscriptions, billed monthly or yearly: Starter is $19.99 a month for 500 credits (about 8.3 hours) with 2 concurrent tasks; Pro is $39.99 a month for 1,500 credits (about 25 hours) with 5 concurrent tasks and priority queue; Advanced is $99.99 a month for 5,000 credits (about 83.3 hours) with 10 concurrent tasks and priority queue. Subscription credits reset each billing cycle. Pay-as-you-go packs need no subscription and never expire, stacking with any subscription: $5 for 100 credits (about 100 minutes) and $10 for 250 credits (about 4.2 hours), the larger pack saving 20% against the smaller. Credits are only charged when a transcription starts and are refunded in full if it fails. Permanent audio storage is included on all paid tiers.

AI research workspace on an infinite canvas for literature review, knowledge maps and cross-source analysis

💰 Free is $0/month with 0 monthly credits but 50 credits refreshed daily, limited access to advanced models, limited file uploads, AI fetch-and-save of external sources, and mind map, document and slide export. Casual is $14/month billed yearly at $168/year (13% off the $16 monthly rate) with 1,100 credits a month plus the daily 50, access to all advanced models, top-up credits that never expire and unlimited file uploads. Plus is $24/month billed yearly at $288/year (20% off $30) with 2,500 credits a month, 25% off credit top-ups and priority AI access at peak times. Pro is $42/month billed yearly at $504/year (30% off $60) with 6,000 credits a month, 40% off top-ups, top-priority peak access and early access to advanced features; larger monthly credit blocks are listed at $70 for 10,000 and $140 for 20,000.

AI workspace for documents, presentations, and research

💰 Free tier available. Pro $9.99/mo, Unlimited $16.99/mo

Startup idea validation that scans 60+ live sources for a viability score, competitor map and source-linked evidence in 60 seconds

💰 Free scan takes about 60 seconds and returns a verdict with no card and no human reading the idea. Founder Report is $29 one-time and carries a 14-day report guarantee. Radar Pro, the ongoing monitoring subscription, is $19 per month. The Investor-Ready Package is $499. Lifetime plans start at $499. A white-label tier is sold separately for agencies and accelerators.

Daily GEO tracking across eight AI engines, with cited-source contact extraction and AI-crawler analytics

💰 All plans open with a 7-day free trial, cancel anytime. Starter is $29/month (listed against a $49 reference price): 1 project, 25 prompts, 2,250 responses per month, twice-weekly refresh, ChatGPT / Claude / Gemini / DeepSeek / Grok / Perplexity, website analytics, AI search bot and crawler analytics, CSV export, 1 team seat, weekly email reports and email plus live-chat support. Growth is $39/month (vs $66): 2 projects, 50 prompts, 4,500 responses/month, daily refresh, unlimited team seats. Pro is $129/month (vs $219): 5 projects, 150 prompts, 14,000 responses/month, daily refresh and adds Google AI Mode and AI Overview. A separate Agency plan is $0/month for agencies managing multiple clients — unlimited projects and seats, daily refresh, all 8 models, priority support — monetised through revenue sharing rather than a subscription. Enterprise is quoted by email.

Web clipper and AI knowledge base with MCP for Claude and ChatGPT — save articles, PDFs, notes and audio, then ask instead of filing

💰 Prices are in euro. Free forever: EUR 0, up to 100 saved items, AI summaries for every item, 3 collections with auto-tagging, AI chat limited to 10 queries per day, and the browser extension. Pro: EUR 4.79 per month for unlimited saved items, unlimited collections, unlimited AI chat, smart auto-tagging, deep AI insights and key-topic extraction, weekly intelligence digests, imports from Google Drive and Notion, and priority support. Pro Plus: EUR 9.99 per month, aimed at researchers and power users, with the same feature set at higher capacity. Annual billing is advertised as two months free, and Pro plans include a 14-day full-access trial; no credit card is required to start on Free.

Online testing and AI proctoring with unlimited tests and test-takers, billed on concurrent usage, plus Google Forms, Classroom and Moodle add-ons

💰 Free trial: $0/mo with 20 trial tests, unlimited quizzes and unlimited team members, plus AI quiz templates. Starter: $24/mo per month paid annually, or $30/mo paid monthly. Pro: $60/mo paid annually, or $75/mo paid monthly, adding camera, screen and forced tracking, branding and Face Match. Ultra: $116/mo paid annually, or $145/mo paid monthly. All tiers include unlimited assessments, team members and test-takers; billing scales on concurrent usage.

AI paraphrasing and writing assistant

💰 Free tier (125 words). Premium $8.33/mo (annual)

AI-powered flashcards and study tools

💰 Free tier. Plus $35.99/yr, Teacher $34.99/yr

AI study platform — flashcards, practice tests, and Socratic tutoring

💰 Free tier. Plus $7.99/mo, Teacher $4/mo

AI reading app with smart highlights, summaries, and flashcard generation

💰 Free 60-day trial. Full plan $7.99/mo or $7.99/mo as part of Readwise bundle

AI question and quiz generation for educators, with reports, collections and leaderboards on a monthly credit system

💰 Starter is $0/month with 150 RZC credits per month, GPT-3.5 only, public quizzes, collections and reports, 7,500-character passage input, 10 questions generated at once, 5 MB uploads, PDF-only export and a 1-month report lifetime. Premium is $12/month with 2,500 RZC credits per month, GPT-4 access and private quizzes, collections and reports. A higher tier is listed at $15/month monthly or $144/year. Annual billing is offered.

UX research canvas that turns interviews and documents into personas, JTBD, journeys and user stories

💰 Annual and monthly billing. On annual, Individual (Freelancer) is $12/month — billed as pay for 9 months, get 12 — with up to 14 days refund and unlimited transcription hours; Business is $15/user/month on the same 9-for-12 basis with a 7-day trial for up to 5 users. On monthly, Individual is $24/month with up to 7 days refund and Business is $30/user/month. A free 3-day individual trial requires no credit card. Student pricing is offered on request by email.

Research discovery with smart recommendations

💰 Free for researchers

Networked thinking tool with bidirectional links

💰 Pro $15/mo, Believer $500 5-year plan

AI research assistant for finding and analyzing scientific literature

💰 Free tier with limited searches. Pro $9.99/mo, Academic $19.99/mo

AI article summarizer for research papers

💰 Free tier. Premium $4.99/mo

AI scientific figure and illustration maker with editable SVG/PDF/PPTX export and journal-standard templates, free tier included

💰 Free is $0: 10 credits on registration plus 5 free credits every day, 7+ professional templates, 6+ visual styles, 30-day history retention and SVG vector conversion. Standard is $20/month, discounted to $10/month on annual billing, for 300 credits a month (roughly 60 images), all AI generation modes, permanent history retention, priority support and 3x faster generation. Premium is $40/month, $20/month annually, for 800 credits (roughly 160 images). Enterprise is $80/month, $40/month annually, for 2,000 credits (roughly 400 images) with a dedicated account manager and 5x faster generation. A standard 2K prompt or custom image generation costs 5 credits; other modes vary. Institutional invoicing with EU VAT is available, as is an education discount.

AI copilot for understanding research papers

💰 Free tier. Premium $12/mo, Teams $20/user/mo

Domain-tuned AI summariser for scientific papers, with structured output, a ChatGPT connector and student pricing.

💰 A free trial covers the first 7 days. A student code gives the first month at $0. The Pro plan is $4/month when billed annually at $48/year, which the site notes saves 42% against monthly billing. Monthly pricing is offered but the figure is not published in the page text.

Smart citations showing support or contradiction

💰 Free tier. Individual $20/mo, Team $30/user/mo, Enterprise custom

Overnight AI brief that reads your newsletters, podcasts, YouTube and local news, strips duplicates and links every claim

💰 One plan, everything included. A 14-day free trial, then $15/month at a founding rate advertised as 50% off a normal $30/month price. No tier ladder, no per-source pricing and no annual commitment is published; the founding rate is described as locked for those who start during it.

Sweeps public sources and surfaces the few source-linked changes that actually matter, privately tuned to you

💰 Four tiers. Shared Briefs are $0 forever: follow public ScoutFox-curated Briefs indefinitely, up to five material changes per edition, public web archive plus email delivery, source-linked curator-approved selections, but no private profile or Interest runtime. Solo Pro is $25 per month for one operator — 5 active Interests, daily Brief editions, delivery to email, Telegram and in-app, standard plus Web/News Scouts, significance ranking that learns your taste, and saved signals with source-linked follow-ups. Max is $99 per month for 25 active Interests, hourly editions, real-time alerts as quality permits, priority routing on all channels, deeper investigation across more verified sources, a higher compute budget on hard queries, advanced source-list, event and portfolio Scouts, LinkedIn profile monitoring and a priority queue. Enterprise is custom-priced for VC and newsroom teams and adds a private Community Scout for authorised Discord and Slack sources, team seats and shared briefs, dedicated brief design, and compliance, audit and retention controls.

Validates a startup idea against Reddit, HN, search demand and competitor revenue, then scopes an MVP spec for coding agents

💰 The first full analysis is free with sign-in and no card required, and the idea generator is free. Three monthly plans follow. Starter is $5/month: one full discovery report per month, 100 AI credits to challenge the verdict, the BUILD/VALIDATE/KILL verdict and the MVP workspace with spec export. Pro is $19/month for founders iterating seriously. Studio is $79/month for running multiple projects in parallel. Monthly billing, cancel anytime.

Open-source AI that captures and remembers your screen activity.

OpenAI's AI search engine with real-time web results and citations

💰 Available in ChatGPT Free (limited), Plus $20/mo, Pro $200/mo

AI survey platform with cross-validation, dynamic AI follow-ups, text anonymisation and MCP survey creation

💰 Priced in euros, free to €499/month, no credit card to start. Free is €0 forever: 1 seat, 50 responses/month, 100 AI credits/month, 1 survey with full AI features including follow-up questions, theme extraction, cross-validation and branching. Starter is €49/month: 1 seat, 250 responses/month, 1,000 AI credits/month, 3 active surveys, cross-validation engine, automations and issue tracking. Higher tiers scale seats, responses and credits up to a €499/month plan. Cross-validation, AI follow-ups and theme extraction are included on every paid plan.

Free AI research tool with paper discovery

💰 Free for all users

Browser side-panel AI agent plus vertical tab manager: chat with open tabs, automate the browser, and organise tabs into synced Spaces

💰 Free: $0/month — up to 5 Spaces with cloud sync, tab management and free AI chat for the current page. Pro: $4.9/month list, promotionally shown at $2.9/month — unlimited Spaces with cloud sync and access to Agent Mode. Pro+: $8.9/month list, promotionally shown at $7.9/month (also displayed as $11.9 elsewhere on the page) — the highest usage tier. The extension itself installs free with no card.

AI sidebar for your browser — chat, summarize, translate, and generate right on any webpage

💰 Free (limited queries/day). Pro $4.99/mo or $39.99/yr (unlimited GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro).

Qualitative data analysis with editable, source-traceable coding and mechanically verified verbatim quotes

💰 Credit-based, billed monthly or yearly, with academic discounts offered on a separate tab. One credit corresponds to roughly one page of text, one minute of transcription or one page of anonymisation; credits are consumed when documents are added to the workspace and cover basic analyses, with some advanced features consuming more. Skimle Trial is €0 for 3 months with enough credits to analyse a first batch of 200–300 pages. Skimle Starter is €25/month with 200 credits to start and 200 credits a month thereafter, with top-ups from €25 for 400 credits. Skimle Expert is €50/month with 600 credits to start and 600 a month, and is marked most popular. Skimle Professional is €100/month with 1,800 credits to start and 1,800 a month. Enterprise starts at €80 per user per month and adds multiple users with permission levels, SSO, private cloud or on-premise deployment, dedicated onboarding workshops, custom integrations, 24/7 support and volume-based pricing. No credit card is required for the trial.

Infinite-canvas desktop app for running many AI sessions side by side across providers

💰 Free is $0 with 1 device activation, 3 desktop canvases, 1 connector, $2 of one-time included usage value and bring-your-own-key chat. Starter is $9/month ($7.50/month billed annually at $90, 17% off) with 2 devices, unlimited canvases, 5 connectors and $4/month of included usage. Pro is $49/month ($40.83/month billed annually at $490) with 3 devices, 30 connectors, all AI models, custom providers and $10/month of included usage. Advanced is $99/month ($82.50/month billed annually at $990) with 5 devices, unlimited connectors, image BYOK and $50/month of included usage. Every tier supports bringing your own subscription or keys, and all tiers include the full canvas workspace, unlimited branches and nodes, PDF, web and YouTube sources, and local-first storage.

AI writing, research & plagiarism checker for students & professionals

💰 Free tier (3 entries/day). Essentials $10/mo, Productive $29/mo

26,000+ free book summaries with full audio in 40 languages, PDF and EPUB export and a one-time lifetime tier

💰 Free covers reading summaries of 26,000+ books, listening to the first key takeaway of every book, up to 10 saved bookmarks and the last 10 books in history. Pro is $9.99/month, or $44.99/year — the vendor computes the annual rate as $3.75/month and describes it as three months free — and unlocks full audio summaries of all 26,000+ books plus unlimited bookmarks and history. A Lifetime tier is a one-time $79.99 payment. Pro carries a 3-day free trial with no upfront payment and a reminder before the first charge, cancellable at any time, and the site publishes a 30-day refund policy.

AI homework help with visual search

💰 Free for all users

Paste an essay and get credible academic sources with factual summaries, credibility checks and citation export

💰 Ultra is listed at $19/month, discounted to $11/month during the summer sale, with a smarter AI model, 30 deep searches per month and 100 source credibility checks per month. Max is listed at $39/month, discounted to $23/month, with the most advanced AI models, 1,000 deep searches per month and 1,000 source credibility checks per month. Yearly billing saves 60% and is billed annually. Both tiers include factual summaries per source, saving sources to a library, citation export, chat with sources, and a priority-support ad-free experience. Payment is secured through Stripe.

Local-first research paper reader with three specialised AI agents and bring-your-own API keys

💰 The app is a free download and runs models through your own provider API keys, so model usage is paid directly to the provider rather than to SpatialRead. Local model use via Ollama is unlimited and free. Documents are stored locally on your device with no cloud storage. No subscription tiers are published on the site.

Meeting-bot transcription that produces structured notes with owned action items, not raw transcripts

💰 Free $0 forever: 5 minutes per note, 3 basic styles, basic editing, audio/video/PDF/YouTube input. Pro adds unlimited length, all styles plus custom templates, revision history, more input types, team sharing and advanced organisation, with a 7-day free trial, a 7-day money-back guarantee and weekly, monthly and annual billing options — the exact Pro figure renders client-side and is not readable from the served page, so none is quoted here. Team and Enterprise plans are listed separately.

Paste a Spotify, Apple, YouTube or TikTok link and get a transcript, summary, episode chat and SRT export

💰 Four tiers with a monthly/annual toggle advertising 30% off annually. Free is $0/month with 3 credits to start. Essential is $6.99/month for 300 credits (roughly 300 episodes or videos). Growth is $9.99/month for 1,000 credits and is marked most popular. Pro is $19.99/month for 3,000 credits, aimed at power users and teams. All paid tiers include summaries, episode chat, export to PDF, DOCX, SRT and TXT, and priority email support.

SQL, Python and R interview practice with company-specific question sets, in-browser engines and AI mock interviews

💰 Quarterly and monthly billing, with an annual pass advertised at up to 70% off. The SQL & R plan is listed at $99/month, discounted to $79/month on quarterly billing, and covers structured SQL and R interview practice, the SQL Mastery course and certificates. A separate AI plan bundles the AI mock interview, resume optimizer, resume builder and premium career documents. Free practice is limited to the anonymous sample question on the homepage.

AI behavioural-interview coach that workshops STAR answers, then tests them with live follow-ups

💰 A free tier and a single one-time purchase — there is no subscription and no recurring charge at any level. Starter is $0 and covers up to 2 interview questions with no credit card required, intended as a genuine trial of the coaching experience rather than a feature-limited demo. Lifetime Access is a $29.99 one-time payment giving unlimited questions, unlimited mock interviews, every feature, and access that never expires. The vendor also runs a separate promotional offer of 10 free AI STAR sessions in exchange for an email address, and offers a 50% discount code on completing a first question. Purchases carry a 7-day money-back guarantee, refunded on request by email with no questions asked. The operating company is Caph LLC.

Turns real family situations into personalised illustrated stories for kids

💰 Unlimited Yearly is $49 a year, down from $69 — advertised as Save 20% and pitched as the best-value plan. Unlimited Monthly is $14/month, down from $19. A one-time 10-pack of Stories is $9 total and creates 10 stories and poems with no subscription. All three include beautiful illustrations, the ability to remake any story, save and share, and work on every phone and tablet; the subscriptions cancel any time. There is a free tier to start — the site's primary CTA is Create a Story for Free.

AI business intelligence for universities — ask questions across SIS, LMS and CRM data in plain language

💰 Sold through a get-in-touch conversation; the site publishes no price sheet, so no figures are recorded here rather than guessed.

Podcast summariser that writes personalised, goal-tailored takeaways and notes rather than generic episode abstracts.

💰 A free entry point is offered. A Team plan is listed as coming soon at $49/month against a $99/month list price. Individual tier figures are not published in the page text, so no monthly price is recorded for them here.

CLI and Chrome Side Panel that extracts clean text from pages, PDFs, YouTube, and podcasts, then summarizes with any model

💰 Free and open source under the MIT license, installed with npm i -g @steipete/summarize. You supply your own model — local models via Ollama or a local CLI provider cost nothing; hosted providers bill you directly.

Open-source NotebookLM alternative that researches the live web through connectors, an API and MCP

💰 Free tier is self-hosting: run the full platform — connectors, agents, automations and the MCP server — on your own infrastructure at $0, with unlimited scraping and crawling that you bill yourself, bring-your-own-keys for any model provider, and community support on Discord. The hosted option is pay-as-you-go with no subscription: your first $5 of credit is free, then you pay for what you use.

Synthetic market research with modelled personas, surveys, focus groups and interviews, plus custom-tuned models

💰 Two published tiers with a EUR/USD toggle. SYMAR Project is €99 / $119 per month, designed for individual researchers or teams running a proof of concept or a simple study: access to all foundational models, standard and synthetic segments, synthetic focus groups and interviews, creative evaluation and basic data analysis, capped at 400 credits/month. SYMAR Program starts at €199 / $239 per month, for teams building a proprietary research engine: custom models trained on your data, single-tenant deployment, persistent memory, sessions and training and custom feature builds. Add-ons and high volume are priced separately, and a demo can be booked.

Open-source synthetic patient data generator

💰 Free and open-source. Apache 2.0 license

AI language tutor with real-time pronunciation feedback and adaptive conversation practice in 25 languages

💰 Free Trial is $0 for 7 days with access to all premium features, AI conversation practice, pronunciation feedback and progress tracking, and requires no credit card. Basic is $9.99/month, or $7.99/month on annual billing, with AI tutoring sessions, basic conversation practice, pronunciation feedback, progress tracking, mobile app access and a single language. Premium is $19.99/month, or $15.99/month annually, adding unlimited AI tutoring, advanced conversation scenarios, detailed pronunciation analysis, personalised learning paths, up to 3 languages, offline mode and priority support. Professional is $39.99/month, or $31.99/month annually, adding unlimited languages, business and professional content, industry-specific vocabulary, advanced analytics, custom learning goals and 24/7 premium support. Annual billing saves 20%, a 30-day money-back guarantee applies to new subscriptions, and students with a valid .edu address can request 50% off any plan.

AI conversation tutor for 130+ languages with a 14-day Premium trial, plus business and education tracks

💰 Free Basic plan: basic chat capped at 10 minutes per day, with personalised learning, progress tracking and the pronunciation assessment tool. Premium sells on 1-, 12- and 24-month terms, each with a 14-day free trial and no payment up front; the 12-month plan is badged SAVE 50% and the 24-month SAVE 69% against the 1-month price. Verified 2026-09-03: the figures themselves still render client-side and the page states prices and currencies vary by location, so no dollar amount is recorded rather than guessed. Separate For Business and For Education plans are quoted through their own pages.

AI quiz generator and live classroom game platform, free-tier Kahoot rival

💰 Priced in pounds sterling. Free is £0 forever and includes 5 quizzes per month, 30 students per live game, 3 AI quiz generations per month, access to the full quiz library and the ability to save. Plus is £4 (the page also shows a £2 figure in the plan block). The comparison table on the same page benchmarks these against Kahoot Free (no AI quiz generation, 10 students per game) and Kahoot Pro at $6/month (no AI quiz generation, 50 students per game). A separate For Schools track handles institutional pricing.

Academic writing assistant generating structured papers with real citations, plus a PDF library and subscription freezes

💰 The free tier gives 5 AI credits per day (one page of essay generation equals one credit) and 5 AI commands per day, with unlimited PDF uploads to the library. Premium unlocks unlimited AI credits, unlimited AI commands and unlimited PDF uploads, and is sold on three cadences: Premium Monthly at $19.99/month with no subscription freeze; Premium Quarterly at $14.99/month, billed $44.99 per quarter, a stated 25% off, including a 1-month subscription freeze and a 14-day money-back guarantee; and Premium Yearly at $8.25/month, billed $99.00 per year, a stated 59% off, including a 3-month subscription freeze and a 14-day money-back guarantee. Prices exclude applicable taxes.

Compresses a long ChatGPT, Claude or DeepSeek thread into a structured handover you can paste into a fresh chat

💰 Free: 1 one-time summary granted at signup. Pro is USD 12.99 per month or USD 129 per year (an effective USD 10.75 per month): 120 summaries, saved threds retained for 7 days and export. Ultimate is USD 39.99 per month or USD 389 per year (an effective USD 32.42 per month): unlimited summaries, saved threds retained for 30 days and an upgraded AI engine. The vendor advertises annual billing as saving two months on both paid tiers.

AI-summarised RSS digests with per-Recipe custom prompts, translation and scheduled delivery

💰 The entry plan is $0.00 and includes 2 million tokens with unlimited RSS subscriptions and unlimited Recipe creation. Billing is metered on summarisation tokens rather than per seat; additional token allowances are available on the pricing page.

Token-level citation API that reads attention to show exactly which source tokens produced each part of an LLM answer

💰 $1 per 1M tokens, pay as you go, with 10M tokens free to start. One API call, no SDK to install. Works with any model — OpenAI, Anthropic, or your own.

Pulls transcripts from any public YouTube video with AI summaries and chat, exposed three ways — web app, REST API with timestamped JSON, and an MCP server for Claude and Cursor.

💰 Four tiers, all carrying the same features — AI summaries, chat with videos, API access and multiple download formats — and differing only in monthly credits. Free is $0/month with 15 credits/month and no credit card required. Starter is $9/month or $72/year. Pro is $19/month or $152/year with 3,000 credits/month. Business is $49/month or $392/year with 10,000 credits/month. Annual billing is four months free (pay for eight). Full refund within 7 days.

Caption-first transcription for YouTube, TikTok, Instagram and uploads, with AI summaries, translation and mind maps

💰 Free is $0 with no card: unlimited caption extraction after login, 0 cloud transcripts per day, 180 ASR minutes per month, 500 AI credits per month, single video only, and viewing without copy, download, bulk tools or API. Cloud saving is paid-only. Lite is $10/month billed monthly (annual billing available at a discount) and adds 500 cloud transcripts plus everything in Free. Higher tiers extend cloud transcript volume, ASR minutes, AI credits, bulk tooling and API quota — the pricing page also lists $20 and $40 monthly figures for the tiers above Lite. Copy, download, bulk tools and API access all require a paid plan. A Chrome extension and a documented API are available; transcripts can be extracted and viewed without signing up at all.

Transcription and translation for calls, meetings and video in 50+ languages with AI summaries, smart highlights and chat-with-transcript, offered pay-as-you-go by the hour as well as monthly.

💰 Pay-as-you-go is listed at $1.49/hour of transcription or translation (regular price $2.00), with purchased hours valid for one year. Premium is $14/month (regular $40) for 20 hours per month. A Business tier sits above it. Every tier includes 50+ languages, no file-length limit, all audio and video file types, AI summarisation, smart highlights and interactive AI chat, and each offers a free trial. The site was showing a 50% one-year discount at the time of verification.

Three frontier models answer blind, cross-examine each other, and you get the answer that survived

💰 Explorer free: 1 free session, full multi-model debate, 2 reasoning iterations, no card (3 free sessions without signup). Reasoner $11/mo: 150 credits, all models, 3 iterations, 32K context, 20 web searches/session, file and PDF upload, 90-day history. Architect $26/mo: 500 credits, 5 iterations, 65K context, unlimited search, priority queue. Collective $66/mo: 1,500 credits, 7 iterations, 130K context, 10 concurrent sessions. Annual saves 30–33%. Non-expiring credit packs: 50 for $7, 150 for $18, 500 for $55.

AI coach for sim racing and Rocket League with live voice coaching, telemetry and post-lap analysis

💰 Free to get started with separate Plans & Pricing pages per game (sim racing and Rocket League); the tier tables render client-side and returned no readable figures to a plain fetch, so no numbers are recorded here rather than guessed. A sale banner runs on the site and a For Business track is offered.

AI drug discovery and molecular design

💰 Custom enterprise pricing for pharma and biotech

Generates personalised courses on any subject with unlimited chat, flashcards and spaced repetition

💰 Billed yearly, advertised as saving up to 30%, with no card required to start. Free gives a feel for how it works with no payment required and limited support. Mentor is $13.33/month: 100+ personalized on-demand courses, unlimited chat interactions, priority support and cancellation at any time. Genius is $17.50/month: 1,000+ personalized on-demand courses, a flashcards and spaced-repetition dashboard, priority support and cancellation at any time. Separate B2B lines are published for educators, corporate training and white-label AI training, quoted on request.

Live browser LaTeX editor with AI assistance, in-browser Python and unlimited free collaborators

💰 Three tiers sold on AI credit allowance rather than seats. Free is $0 forever with unlimited projects, real-time collaboration for unlimited users, basic LaTeX compilation, PDF export, a basic AI writing assistant with limited AI usage, access to all integrations and extensions, full version history and community support. Pro is $20 per month and adds priority compilation, $20 of AI credits per month with generous auto-credits, inline tab autocomplete, reference management, custom templates and priority support. Max is $40 per month with the same feature set and $40 of AI credits per month, aimed at power users who need maximum AI. The vendor's FAQ addresses plan switching, a Pro trial, document retention after cancellation, student and academic discounts and self-hosting.

Online course marketplace with 200,000+ courses

💰 Individual courses $14.99-$199.99. Business $30/user/mo

AI-moderated customer interviews that probe 5–7 layers deep, on your customers or a 4M-person panel, priced per quality interview

💰 Start free with 3 quality interviews using your own participants. Starter is pay-as-you-go at $30 per quality voice interview with $0/month and no annual contract; a lower per-interview rate of $25 is published on higher-volume plans. Sessions that miss the quality bar are not charged. A 5-interview study using your own audience starts at $150. Panel recruiting is billed separately from the platform. Cancel anytime.

Video learning notebooks with timestamped slide capture, transcript search, video-grounded Q&A, quizzes and flashcards

💰 Priced per video hour per month rather than per seat, with two notebook types. Essential notebooks are $5 per video hour per month, billed monthly, and cover automatic timestamped slide capture and transcript search. Pro notebooks are $10 per video hour per month and add timestamped text chapters where a video has no slides, plus the fuller feature set. Each account can hold both types and is charged per hour of video in each. The first month is free unless the account exceeds 10 video hours.

AI visibility tracking plus the content and outreach work needed to get cited more

💰 Four tiers, all priced per domain per month, each with a 7-day free trial and no charges during the trial. Lite is $37 per domain per month for solo agencies and marketers: 1 answer engine (ChatGPT), 40 prompts tracked, 2 content generations, 1,200 responses analysed, unlimited implicit outreach and explicit content opportunities, brand sentiment analysis, all-time history, daily monitoring, GSC integration and 1 strategic monthly call. Essential — marked most popular — is $97 per domain per month for 2 answer engines (ChatGPT and AI Overviews), 100 prompts, 5 content generations, 6,000 responses analysed and 2 monthly calls. Starter is $297 per domain per month for 5 answer engines (adding Gemini, Perplexity and AI Mode), 400 prompts, 15 content generations, 60,000 responses and 3 monthly calls. Pro is $497 per domain per month for 5 engines, 1,000 prompts, 70 content generations, 150,000 responses and 5 monthly calls. Content Optimization is marked BETA on every plan.

AI writing assistant for researchers writing papers in English, with PubMed and Crossref citations inside the editor.

💰 Free trial with no credit card required. Pro is $12/month billed yearly ($144/year) or $24/month month-to-month, covering inline suggestions, the advisor, precision mode and PubMed/Crossref references. A 50% discount on yearly plans was running at verification.

Computational knowledge engine for math, science, and data.

💰 Free tier available. Pro $9.99/mo (or $5/mo at $60/year). Pro Premium $12/mo (or $8.25/mo at $99/year) with extended computation time and higher file uploads.

PDF assistant focused on explaining tables and figures, with semantic search, report generation and knowledge graphs

💰 Per member per month, with a 25% saving on yearly billing. Starter is $10/month: 200 pages free per month, 50 question credits free per month, additional pages at $0.50 each, additional question credits at $0.50 each, and access to basic features. Pro is $50/month: 500 pages and 200 question credits per month, the same $0.50 overflow rates, plus 2 free report generations and 2 free knowledge graphs per month. Ultra is $100/month: 1,000 pages and 500 question credits per month, same overflow rates, plus 5 free report generations and 5 free knowledge graphs per month. Enterprise is contact-sales and includes multiple workspaces, unlimited question credits, unlimited pages, sharing with others, document libraries and a dedicated support team. Two meters run at once — pages processed and questions asked — so long documents consume the page allowance quickly.

Citation-backed AI writing assistant for essays, papers, literature reviews and theses

💰 Pro is listed at $9/month on annual billing under a summer sale (against $12), billed at $108 annually, and includes efficient AI models, chat with PDFs and images, academic and web search, your library, and 1,000 AI actions per month. Ultra is listed at $14/month on annual billing under the same sale (against $19), billed at $168 annually, and adds frontier models and unlimited AI actions. The default chat model and document editing never consume credits, and extra credits can be purchased at any time and do not expire.

AI search engine with chat and multimodal features

💰 Free tier. Pro $20/mo with unlimited AI queries