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Best free AI research tools (2026)
6 of the 9 AI research tools we rank have a free plan, free tier or free open-source release. In our ranking order, the best free option is Gemini Notebook (#1), followed by Elicit (#2) and Exa (#4).
The 6 free options, in ranking order
From each tool's own pricing page- #1 Gemini Notebook
- Free plan: Free for personal use with standard limits and up to 50 sources per notebook.Source: notebook.google, checked Our verdict: Google's source-grounded research notebook (formerly NotebookLM); turns your files into summaries, audio and video overviews, slides and mind maps.
- #2 Elicit
- Free plan: Basic is free: limited Research Agent and Research Reports, plus unlimited search across more than 138 million papers, unlimited summaries, unlimited chat with papers and Zotero import.Source: elicit.com, checked Our verdict: Search across more than 138 million papers, with a Research Agent and Research Reports. Free Basic plan; Pro $49 and Scale $229 per user a month, billed annually.
- #4 Exa
- Free plan: Starter is free with $10 of credits every month plus a $10 onboarding bonus, no payment method required, and access to all endpoints and the MCP server.Source: exa.ai, checked Our verdict: Search API built for AI agents, on its own crawler and index. Exa 3.0 (Oct 19, 2026) added a cheaper Lite search type at $4 per 1,000 requests.
- #5 Undermind
- Free plan: Free at $0 for exploratory research: AI models for chat, deep searches and reports, shared workspaces, connections to agents like Claude and ChatGPT, and standard rate limits.Source: undermind.ai, checked Our verdict: AI literature search agent that runs deep searches across papers and writes reports; free plan, Pro from $16 a month billed annually. Good at finding papers keyword search misses.
- #6 Semantic Scholar
- Free plan: A free AI-powered research tool for scientific literature from Ai2, with free accounts.Source: semanticscholar.org, checked Our verdict: Free AI-powered academic search from AI2 that indexes over 200 million papers. The best free place to start finding and tracking literature.
- #9 ScholarMuse
- Free plan: 300 sign-up credits valid for 30 days plus 30 free credits a month (100 credits equal $1).Source: scholarmuse.ai, checked Our verdict: One MCP server that gives Claude, ChatGPT, Codex or Cursor real paper search, reference and retraction checks, data from 50+ official sources and scientific figures, each result with its source. 300 free credits to start; paid plans from $30 a month. New, and built for agents rather than reading in a browser.
Ranks are from our full ranking of AI research and notes (9 tools). Consensus lists a free plan in our fact sheet, but its prices did not load for us on Nov 10, 2026, so it is not listed here. AgentSEO and Desearch offer one-time or card-gated credits rather than an ongoing free plan. Ranked tools not listed have no ongoing free plan on their pricing page or our fact sheet. Free plans change often, so check the official page before you rely on one. Nothing on this page is sponsored.
Questions
Frequently asked
What is the best free AI research tool?
Gemini Notebook, ranked #1 of 9. Its free option: Free for personal use with standard limits and up to 50 sources per notebook. Source: https://notebook.google/plans, checked 2026-11-10.
Which AI research and notes tools are free?
Gemini Notebook (#1), Elicit (#2), Exa (#4), Undermind (#5), Semantic Scholar (#6), ScholarMuse (#9).
How did you check the free plans?
We opened each tool's own pricing page or repository on Nov 10, 2026 and wrote down what the free option includes. Tools whose only free option is a trial or a one-time signup credit, or whose pricing page did not load for us, are left out.
Is the order the same as the full ranking?
Yes. Tools appear in the same order as our full ranking of AI research and notes, which is based on how well each tool does the job, not on price.
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