Best AI Search & Knowledge Tools
AI search engines, knowledge bases, and information retrieval
Build a search & knowledge tool? This is the list AI assistants read.
These are the search & knowledge tools ChatGPT names when someone asks for a recommendation, and Perplexity is the one it names first. If you built one that isn't here, adding it is free — the listing publishes after review. Want it live in minutes with a Verified badge instead? That option is on the form, one-time, no subscription.
All Search & Knowledge Tools (25)
Perplexity
AI search engine with cited, real-time answers
Phind
AI search engine for developers
Genspark
AI search and agent platform with autonomous research and content creation
Fellou
Agentic AI browser that automates complex web tasks and deep research
Dia
AI-native browser from Browser Company with contextual intelligence
Kagi
Premium ad-free search engine with AI features
You.com
AI search engine with chat and multimodal features
Brave Search
Privacy-first search engine with AI summaries — no tracking, independent index
Arc Search
AI-powered mobile browser that reads the web for you and builds instant summary pages from multiple sources
SearchGPT
OpenAI's AI search engine with real-time web results and citations
Felo
Multilingual AI search engine — search and understand content across language barriers
Google AI Overviews
AI-generated summaries built into Google Search, powered by Gemini
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Stillwind
Natural-language electronic component search with datasheet-traceable specs, plus a beta copilot that builds validated BOMs from a prompt
summarize
CLI and Chrome Side Panel that extracts clean text from pages, PDFs, YouTube, and podcasts, then summarizes with any model
Triall
Three frontier models answer blind, cross-examine each other, and you get the answer that survived
PageBrain
Permission-aware AI apps for Confluence and Jira, including an assistant grounded in your own Atlassian content and a document-embed add-on.
ContextWire
One-call research API returning sourced answers across 100+ engines, with an MCP server
Linkup
Production web search API for AI — sub-second cited search, page fetch and async deep research
GPT Researcher
Open-source autonomous research agent — plans subtopics, gathers sources, writes a cited report
SurfSense
Open-source NotebookLM alternative that researches the live web through connectors, an API and MCP
Exa AI
Neural search API for AI applications
Verified Tools
AI & SaaS directory where "verified" is checked against the live site, not claimed.
VOXFIELD
Transforms scripts into human-sounding voiceovers.
AI Tools Vault
AI Tools Vault — description pending review.
AIDogeBox
Free AI discovery hub for comparing tools, learning practical guides, and following AI news.
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