Search AI tools
AI-powered search and research tools that answer questions with cited sources. This hub lists 18 tools we currently track, including Guru, Scite, SciSpace, Hebbia, and more.
12 publish a free plan or free tier, 12 are freemium, and 6 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.
44 side-by-side comparisons in this category are linked below: price and capabilities only, no declared winner.
Most recently featured tool in this hub: Oct 26, 2026.
- Finding and synthesizing peer-reviewed research papers
- Visualizing scientific agreement on specific research questions
- Connecting AI agents to verified scientific citations via MCP or REST API
Search · With a free option
12 tools
SciSpace
AI research assistant for literature reviews, paper analysis, and academic writing
Cloro
The search API for the AI era
Elicit
AI research assistant for literature review and paper analysis
Tavily
The web search and content extraction layer for AI agents
NotebookLM
Google's research assistant grounded in your own sources
Nouswise
AI-powered research grounded in trusted information
10% off your first 6 months through our link
Consensus
AI powered scientific search engine for peer reviewed research
Exa
Web search API built for AI agents
You.com
Web search APIs for AI agents and language models
agents Google Gemini agents
Google's conversational AI for text, image, and code generation
agents ChatGPT agents
Conversational AI model for text generation and interaction
Perplexity
AI answer engine with source citations and conversational search
Search · Paid only
6 tools
Guru
Enterprise AI knowledge platform with automated quality and maintenance
Scite
AI platform discovering and evaluating scientific literature through Smart Citations
Hebbia
Institutional intelligence and knowledge platform for firms
Glean
Enterprise search and AI assistant connected across company data
Gushwork
AI growth system for generating qualified leads
OmniSEO
AI search visibility and answer engine optimization tools
Compare search tools
All comparisons →Side by side on price and capabilities. No scores.
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People also ask
What AI search tools do you track?
This page lists 18 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 We do not publish "best of" rankings.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?
12 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.