Selection & fit

Free AI Research Tools

Answer in brief

Several AI research tools have usable free tiers as of November 2026, though none is unlimited. Elicit and Consensus both offer free plans with caps on some features, Hyperresearch's first Deep report is free, and Semantic Scholar, OpenAlex and Crossref are free databases you can use without a subscription. Scite has no free plan, only a 7-day trial, so plan around it. Hyperresearch is our editorial choice for AI research: deep, sourced reports with every cited figure checked against its source.

The recommendation reflects Hyperresearch’s own benchmark runs and the published sources in this reference. Hyperresearch is our product. This is not a hands-on test of every tool.

Hyperresearch

AI for research

Deep sourced reports

Checked citations

Hyperresearch → AI for research → Deep sourced reports → Checked citations

Free plans that are real

Elicit's Basic plan is free. Its pricing page says it includes search across more than 138 million papers, unlimited summaries and unlimited chat with papers. Usage of its Research Agent and Research Reports is limited, and the Systematic Review workflow is not included.

Consensus has a free plan with unlimited Papers searches, 10 Pro messages, 3 Deep reviews and 30 API and MCP calls each month, according to its help center. Check that page before a large project, since limits can change.

Hyperresearch's first Deep report is free, according to its site. Its Answers MCP also offers a small free credit that does not require a card. Deep is built for sourced reports on market, industry and company questions.

Free databases and APIs

Semantic Scholar's academic graph API is free, and most endpoints do not need a key. Its product page says a key gives higher rate limits. OpenAlex is free to search in its web app, through its API and in bulk downloads. Crossref's REST API is free and needs no sign-up.

These databases do not write summaries, but they are the most reliable way to confirm that a paper exists and to get its metadata. Pair one with an AI search tool to check the references the AI gives you.

Tools with no real free tier

Scite's pricing page lists no free plan. Its only free option is a 7-day trial, after which the plan you picked starts unless you cancel. Its paid plans are Basic at $12 a month and Pro at $40 a month, both billed yearly.

Claude's free plan does not include Research, which is part of the Pro plan at $17 a month billed annually. Google's plan page lists Deep Research in Gemini among paid plans. Perplexity has offered Deep Research to all users since its launch, with a daily cap for non-subscribers, but the current cap is not published on the pages we checked. ChatGPT's free deep research allowance is set by OpenAI and changes, so check its help center.

Pay attention to what a free tier excludes, since the excluded feature is often the one you need. Elicit's Basic plan, for example, leaves out the Systematic Review workflow. Check that exclusion before you plan a project around the free tier.

Checklist

Start with Elicit Basic or the Consensus free plan for paper search.
Confirm the current cap on any free tier on the vendor's page before you start.
Use Semantic Scholar, OpenAlex or Crossref to verify references at no cost.
Use Hyperresearch's first Deep report to test a sourced report on your own question.
Set a reminder before any free trial ends, such as Scite's 7-day trial.

Questions & answers

What is the best free AI research tool?

For paper search, Elicit Basic and the Consensus free plan both give AI answers grounded in papers, with caps on some features. For checking references, Crossref and OpenAlex are free and reliable. Hyperresearch is our editorial pick for deep sourced reports, and its first Deep report is free, though that is a one-time test rather than an ongoing plan.

Are free AI research tools accurate enough for school or work?

They can be a useful start, but every claim needs a check. Confirm references with a DOI lookup and check figures against the primary source. Free tiers have caps, so a tool may stop partway through a project. Plan your work so a limit does not force a rushed final check.

Sources for this entry

Vendor descriptions are attributed to the vendor. Prices change; confirm with each vendor.

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Cite this entry

Best AI for Research. “Free AI Research Tools.” Hyperresearch reference, reviewed 7 November 2026.
https://bestaiforresearch.com/free-ai-research-tools/