Best AI Research Tools in 2026

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.

Open-source RAG platform for production AI chat and search — multimodal ingestion, automatic citations and metadata filtering behind JS and Python SDKs.

💰 Free forever: 1,000 pages, 10,000 retrievals per month, community support, no connectors. Pro $49/month: 10,000 pages with $0.01 per additional page, unlimited retrievals, email support, connectors at $100 each, plus Deep Research. Enterprise is custom, adding unlimited pages and retrievals, on-premise or BYOC deployment, SOC 2 / HIPAA / GDPR reports, SSO and dedicated engineering support.

AI for predicting protein structures

💰 Free for academic research. AlphaFold Database publicly available

AI-powered mobile browser that reads the web for you and builds instant summary pages from multiple sources

💰 Completely free. No paid tier currently.

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.

Privacy-first search engine with AI summaries — no tracking, independent index

💰 Free search and basic AI (Summarizer). Brave Leo Pro $14.99/mo for advanced AI models in browser

Interactive STEM learning through problem-solving

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

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).

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.

Enterprise AI platform for text and RAG applications

💰 Free trial tier. Production pricing from $1/million tokens, Enterprise custom

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.

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

Local-first searchable history for Claude Code and Codex, exposed back to agents via CLI, skill and MCP

💰 Three ways to run it, split by personal versus commercial use. Local personal use is free with no account: the macOS app and CLI on one Mac, unlimited local history, Apple Intelligence summaries, and native CLI, skill and MCP access to 100% of your history. Local Commercial is the same local app licensed for work at $8 per seat per month, or $77 per year (a stated 20% saving), covering one person across all their machines on Mac and Linux — checkout is self-serve in the browser and the licence code arrives by email. Cloud and Personal Self-Hosted tiers are offered above that, with the vendor stating a Local purchase is credited toward a Cloud upgrade. Local mode sends nothing to Contextify by default.

One-call research API returning sourced answers across 100+ engines, with an MCP server

💰 Free $0/mo including page extraction, search profiles, and MCP server access. Pro $10/mo. Business $30/mo listed as coming soon.

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.

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.

Builds a live ontology of your code, infra and tools so AI and engineers can query the whole stack at once

💰 A starter plan at $99/month covers the essentials, and a team plan at $499/month adds collaboration features. Both include a 14-day free trial. Self-hosted and air-gapped deployments are available.

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.

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

Classic note-taking with AI search and summarization

💰 Free tier. Personal $10.83/mo, Professional $14.17/mo

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

Agentic AI browser that automates complex web tasks and deep research

💰 Free tier available. Premium plans with expanded capabilities

Multilingual AI search engine — search and understand content across language barriers

💰 Free plan with limited searches. Pro from $8.99/mo for unlimited multilingual searches.

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 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.

Google's multimodal AI with workspace integration

💰 Free tier. Advanced $19.99/mo with Gemini Ultra and 2TB storage

Desktop AI knowledge assistant that answers across your tools, no filing

💰 Free is $0 per user per month with unlimited interactions with the personal AI, one app integration, the Mac and Windows apps and basic support. Plus is $8 per user per month billed annually and raises that to two app integrations with the same unlimited interactions and basic support. Pro is $19 per user per month billed annually with unlimited integrations, the Mac and Windows apps and premium support.

Bioinformatics software for genomics

💰 Personal subscriptions per year: Student $200, Academic $620, Corporate $2,150. Multi-user academic from $1,330/yr for 2 users; corporate from $4,700/yr for 2 users. Enterprise custom-priced.

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.

AI-generated summaries built into Google Search, powered by Gemini

💰 Free — built into standard Google Search results with no separate account or subscription.

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.

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

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

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.

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.

Search AI platform with embeddings, rerankers, web reader, and deep search

💰 Free tier (100 RPM). Paid plans (500 RPM, 2M TPM). Premium and Enterprise available

Premium ad-free search engine with AI features

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

Open-source bookmark manager for links, notes and images with automatic AI tagging

💰 Self-Hosted is free forever with unlimited bookmarks, unlimited storage, complete data control, the mobile and web apps, browser extensions and community support — the vendor states the self-hosted version has no restrictions relative to the cloud. Karakeep Cloud Free is $0 for trying it out with 10 bookmarks and 20 MB storage. Cloud Pro is $4/month (yearly billing saves 17%) with 50,000 bookmarks, 50 GB storage, AI-powered tagging, full-text search, the mobile and web apps and browser extensions. Corporate is custom per seat with everything in Pro plus custom deployment and domain, SSO, user management and priority support. A 7-day money-back guarantee applies to paid plans and data remains available for 30 days after cancellation.

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.

Desktop AI assistant that pulls context from your screen, apps and meetings, with a full-featured free tier

💰 Basic is $0 and includes full context from screen, apps and meetings, daily usage credits for chats and routines, limited meeting notes, meeting notes in 10+ languages, web search, quick access, mobile chat, calendar and email connections, cross-app instant search, community support and privacy protections. Plus is $17/month on an annual subscription ($204 up front) or $20 billed monthly, adding advanced chat intelligence, enhanced memory and personalisation, monthly usage credits, purchasable non-expiring usage packs, unlimited meeting notes, image generation and access to maximum-intelligence models for complex tasks and deep research. Power is $42/month annually ($510 up front) or $50 billed monthly. Both paid tiers include a 14-day free trial, and separate Individual and Team plan tracks are offered.

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

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

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

💰 Free tier available. Pro plans for advanced features

Open-weight 7B math specialist from Mistral AI — STEM reasoning, MATH benchmark SOTA at release

💰 Open weights on Hugging Face (mistralai/mathstral-7B-v0.1) — free to download and self-host. Compatible with mistral-inference and mistral-finetune. No commercial API endpoint offered at release; self-hosting required.

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 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

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.

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.

OpenAI's advanced reasoning model for complex multi-step tasks

💰 Included in ChatGPT Plus ($20/mo) and Pro ($200/mo). API pricing varies by usage

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.

Permission-aware AI apps for Confluence and Jira, including an assistant grounded in your own Atlassian content and a document-embed add-on.

💰 Distribution and billing run through the Atlassian Marketplace, and the company site publishes no per-tier figures, so no price is recorded here.

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.

AI search engine for developers

💰 Free tier. Phind Pro $15/mo with faster models

Managed vector database for AI similarity search

💰 Free tier with 2GB storage. Standard $70/mo, Enterprise custom

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.

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.

AI paraphrasing and writing assistant

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

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

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.

Searchable computer history for people and AI assistants.

💰 Free and paid plans. Free starts on one device at $0. Basic is $21/mo ($250/yr) for full personal history. Business is $42/seat/mo ($500/seat/yr) for cross-device and team workflows. Enterprise is custom. Business use requires a paid plan under the Screenpipe Commercial License. Current terms: https://screenpipe.com/pricing

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.

Voice notes with speaker-labelled transcripts and a cross-recording memory you can query months later

💰 Monthly billing with a limited lifetime option. Free is $0: 2 hours of recording per month, AI summaries, basic memory and search, limited AI chats, web and mobile access. Pro is $14.99/month for individuals using it daily: up to 30 hours per month, memory across all recordings, unlimited AI chats and web search. A lifetime purchase is offered as a limited-availability alternative to the subscription. No card is required to start on the free tier.

AI writing, research & plagiarism checker for students & professionals

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

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.

Natural-language electronic component search with datasheet-traceable specs, plus a beta copilot that builds validated BOMs from a prompt

💰 Free to try — the site offers example queries without an account and has a Sign In flow. No public pricing page exists as of July 2026; commercial enquiries go through Contact Us.

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

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

💰 Free: 1 summary per account, up to 500,000 characters per handover, 24-hour retention. Paid plans are credit-based (1 credit per 50,000 characters summarized, rounded up; unused credits roll over one billing cycle): Starter is USD 3.99 per month for 30 credits, Pro is USD 9.99 per month for 100 credits, Ultimate is USD 19.99 per month for 250 credits. Paid handovers go up to 1 million characters; retention is 7 days on Starter and Pro, 30 days on Ultimate. Active paid subscribers can buy top-ups (10 credits USD 2.99, 30 for USD 6.99, 75 for USD 14.99, valid 12 months). Annual billing is offered.

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.

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 drug discovery and molecular design

💰 Custom enterprise pricing for pharma and biotech

Search, tag and organise Twitter/X likes and bookmarks with background sync, Notion export and an offline Chrome extension

💰 Three tiers. Free is $0 with no time limit: core search and tagging and 5 saved filters, upgradeable at any time. Standard is $8.9/month and marked recommended: sync up to 10,000 likes and bookmarks, cloud tweet backup, CSV and Notion export, full search and tagging and unlimited saved filters. Team is $89/month for ongoing team usage: sync up to 1,000,000 likes and bookmarks, CSV, Notion and API export, team controls, an AI knowledge base over the collection and automatic sync. A Chrome extension supports offline mode with local data, local search and post tags.

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.

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.

Open-source vector database with built-in ML integration

💰 Free Forever $0/mo (Engram). Flex from $45/month pay-as-you-go, Premium from $400/month on a prepaid contract. Enterprise custom.

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