Search AI tools
AI-powered search and research tools that answer questions with cited sources. This hub lists 9 tools we currently track, including OmniSEO, NotebookLM, Nouswise, Consensus, and more.
8 publish a free plan or free tier, 8 are freemium, and 1 are paid-only in our data. Entries are written from each vendor's own pages and re-checked on a schedule. We do not invent star ratings or paid rankings.
24 side-by-side comparisons in this category are linked below: price and capabilities only, no declared winner.
Most recently featured tool in this hub: Sep 3, 2026.
search OmniSEO
AI search visibility and answer engine optimization tools
search NotebookLM
Google's research assistant grounded in your own sources
search Nouswise
AI-powered research grounded in trusted information
search Consensus
AI powered scientific search engine for peer reviewed research
search Exa
Web search API built for AI agents
search You.com
Web search APIs for AI agents and language models
agents Google Gemini
Google's conversational AI for text, image, and code generation
agents ChatGPT
Conversational AI model for text generation and interaction
search Perplexity
AI answer engine with source citations and conversational search
- Searching and querying internal document libraries
- Generating verifiable answers for regulated industries
- Summarizing complex source material into visual recaps
Compare search tools
All comparisons →Side by side on price and capabilities. No scores.
People also ask
What AI search tools do you track?
This page lists 9 search tools with factual pricing models and capability tags. We do not publish "best of" rankings. Open any tool page for full plan tiers, or use a comparison page when two tools share a category and tags.
Which AI search tools are free?
8 tools in this hub have a free plan or free tier. Use the free search link when shown, or check each tool's pricing section. Trials are not counted as free plans.
How often is this list updated?
One new tool is added to the directory most days. Hubs update automatically when a tool is published into this category. Pricing is re-read from vendor pages on a schedule.