Is ResearchRabbit free? Yes. ResearchRabbit has a Free plan that costs $0 with no end date, and it includes unlimited searches, an unlimited library and collections, sharing with collaborators and up to 50 seed papers per search. The paid tier, ResearchRabbit+ (RR+), is optional: it raises the seed limit to 300 and adds advanced search controls, multiple projects and integrity alerts, for $10 a month on the annual plan or $12.50 a month on the monthly plan at default US pricing.
For most students writing a paper or thesis chapter, the free plan is enough. The rest of this guide explains exactly where the free limits are, what changed when the paid tier arrived in late 2025, how country pricing works and when RR+ is worth it. We read ResearchRabbit's pricing page, its country pricing page, its release notes and its own getting started guide, and checked everything on November 2, 2026. We did not create an account or test the app first hand.
Is ResearchRabbit free? The short answer
ResearchRabbit is a literature discovery tool. You give it a few papers you already trust, which it calls seed papers, and it shows you related work, earlier work, later work and connected authors on an interactive citation map.
According to the ResearchRabbit pricing page, the Free plan is "$0, Forever" and includes:
- unlimited searches across what the page describes as more than 310 million articles
- an unlimited library and unlimited collections
- collaboration by sharing a collection
- up to 50 seed articles in a search
- core search settings
The same page's FAQ says ResearchRabbit "has and will always have a free offering," and that the free tier has everything you need to finish a literature review, including library uploads. So the honest answer to "is ResearchRabbit AI free" is yes, with a cap on how many seed papers you can feed one search.
What changed in 2025: free plus a premium tier
For years ResearchRabbit was simply a free tool with no paid plan. That changed in October 2025. The company's October release announcement described a partnership with Litmaps that brought millions of new articles, new search filters, integrated note taking and an optional premium tier powered by Litmaps' technology.
The announcement answered the obvious worry directly. Asked whether ResearchRabbit would still be free, it said yes, the free tier "is here to stay," and that existing collections would carry over unchanged. The site footer now reads "Copyright © Litmap Limited," which matches that partnership.
If you used ResearchRabbit before late 2025 and remember it as entirely free with no limits, that is why the pricing page looks different now. The core features are still free. The seed paper cap and the extra tools are what separate the two tiers.
ResearchRabbit free plan limits
The one limit most people will notice is 50 seed articles. A seed is a paper you select as the starting point for a search. ResearchRabbit uses your seeds to find similar work, references and citing papers, so more seeds give it more to work with.
Fifty is a lot for normal coursework. ResearchRabbit's own step by step guide suggests starting with "a small but thoughtful set" of seeds, ideally including one well cited foundational paper and one recent paper. Most term papers and thesis chapters start from a handful of papers, not dozens.
Where 50 can start to pinch is a large systematic or scoping review, where you might want to feed in a long list of included studies at once. That is the case RR+ is aimed at.
Other things the free plan keeps:
- Search. There is no cap on how many searches you run. Since April 2026, keyword search supports AND, OR and NOT operators and exact phrases in quotes, and the April 2026 release note says keyword search uses the Google Scholar search engine.
- Collections and library. Both are unlimited, and you can share a collection with collaborators.
- The map. The July 2026 release lets you choose whether the map and first page of results show 10, 20 or 40 papers, and added a reading list for papers you want to come back to.
What RR+ adds, and what it costs
ResearchRabbit+ keeps everything in the Free plan and adds, per the pricing page:
- up to 300 seed articles for large reviews
- advanced search controls
- multiple projects, so you can keep separate topics apart
- Signals alerts, which flag papers that may be high risk
- faster support responses
The July 2026 release note explains the Signals feature. ResearchRabbit partnered with Signals to evaluate articles inside RR+, looking for high risk papers based on their citation behavior and citation network, with indicators shown in your collections and while you explore. That is a useful extra check, but it does not replace reading the paper or checking where it was published.
ResearchRabbit pricing at a glance
| Plan | Price (default pricing) | Seed papers | Who it suits |
|---|---|---|---|
| Free | $0, no time limit | Up to 50 | Students, coursework, most theses |
| RR+ annual plan | $10 a month | Up to 300 | Large reviews, several projects |
| RR+ monthly plan | $12.50 a month | Up to 300 | Short heavy use, such as one review |
| Institution | Contact sales | Not listed | Libraries and universities |
The pricing FAQ says RR+ is a monthly subscription you can cancel at any time, and that you keep RR+ access until the end of the period you paid for. The Institution plan adds volume discounts, a LibKey integration with your library, user management, usage statistics and dedicated support. No price is published for it.
Prices on the pricing page are marked with an asterisk because they change by country, which is the next point.
Country pricing and discount codes
ResearchRabbit uses what it calls parity pricing. The pricing FAQ says the default price of $10 a month covers the US, UK, Canada and other countries, and that RR+ is discounted for more than 100 countries based on each country's parity group.
The country parity pricing page lists the qualifying countries, which include India, Brazil, Mexico, the Philippines, South Africa, Poland and Spain among many others. It does not publish the discount amounts. Instead, if you are eligible, you see your discount and a promo code when you click Upgrade inside the app, and you apply that code at checkout.
So if you have seen "ResearchRabbit promo code" offers elsewhere, the official route is simpler: log in, click Upgrade, and the app shows the code for your country. Questions about it go to support@researchrabbit.ai, according to the same page.
Who needs RR+, and who can stay free
Stay on the free plan if you are a student writing essays, a term paper, a dissertation chapter or a first literature review. Unlimited search, unlimited collections and 50 seeds cover that work. Our guide to the best AI tools for students shows other free tools that fit the same workflow.
Consider RR+ if you are running a systematic review with a long list of included studies, you juggle several unrelated research topics and want separate projects, or you want the Signals integrity alerts while you screen papers. Because RR+ can be cancelled at any time, one option is to pay for a single month during the heaviest part of a review.
Ask your library first if you are at a university. The Institution plan exists for libraries, and your institution may already have access or be willing to request it.
How to use ResearchRabbit on the free plan
This is a short version of the workflow ResearchRabbit describes in its own getting started guide.
- Create a project. After signing up you are asked to name a first project. It is just a workspace for one topic.
- Search for a starting point. Use the search bar with keywords, a topic, a title or a DOI.
- Pick your seeds. Tick a few relevant results, then click Search. Mix one well cited older paper with one or two recent ones.
- Read the map. Your seeds appear with related papers around them. In the map, higher means more cited and further right means more recent, so you can spot the classic papers and the newest ones quickly.
- Follow the threads. Open a node to read the abstract, then explore Similar Work, Earlier Work (references) or Later Work (papers that cite it).
- Save to collections. Add good finds to a collection, or to the reading list if you are not ready to file them yet.
Two habits make the free plan go further. Keep seeds focused on one question per search, and import papers you already have from Zotero instead of searching for them again, since the help center documents a Zotero importer.
ResearchRabbit alternatives, free and paid
ResearchRabbit is one of several research tools with a useful free tier. Each does a different job.
- Semantic Scholar is a fully free academic search engine. It is a good way to confirm that a paper a chatbot mentioned actually exists. Our guide on whether Semantic Scholar is reliable explains what to trust there.
- Litmaps is the closest relative, and the company behind the partnership. Its pricing page lists a free plan with basic search and up to 20 inputs, and a Pro plan from $10 a month with unlimited inputs and maps, with discounts for some countries.
- Elicit builds tables that compare findings across many studies.
- Consensus answers a research question and cites the papers behind its answer.
- Scite shows whether later papers supported or disputed a study.
These tools work well together. A common pattern is to find papers with search, map connections in ResearchRabbit, and check key claims in Scite. Our guide to the best AI tools for research paper writing walks through that full workflow, from finding sources to drafting.
A note on accuracy
ResearchRabbit's own pages give different totals for the size of its database: the pricing page says more than 310 million articles, the home page says over 320 million, and a help center article says more than 270 million. A database that grows daily will show different numbers on different dates, so treat any single figure as a snapshot. What matters more for you is that every result links back to a real paper you can open and read.
Also remember that recommendations come from citation patterns. A heavily cited paper is influential, not automatically correct. Read the paper, check the venue and look at how later work treated it before you rely on it.
FAQ
Is ResearchRabbit completely free?
The core tool is free with no time limit: unlimited searches, unlimited collections, sharing and up to 50 seed papers per search. Some features, such as 300 seed papers, advanced search controls, multiple projects and Signals alerts, need the paid RR+ plan.
Is ResearchRabbit AI free for students?
Yes. Students can use the Free plan at no cost, and ResearchRabbit says it covers a full literature review. The pricing page does not list a separate student discount, but RR+ is cheaper in more than 100 countries through parity pricing.
How much does ResearchRabbit cost?
The Free plan is $0. RR+ costs $10 a month on the annual plan or $12.50 a month on the monthly plan at default pricing, which applies in the US, UK and Canada. The Institution plan is priced on request.
Do I need a credit card to use ResearchRabbit?
The pricing page offers a plain sign up for the Free plan and does not mention a card or a trial. You only go through checkout if you choose to upgrade to RR+.
Will my collections disappear if I stop paying for RR+?
ResearchRabbit says you keep RR+ access until the end of the period you paid for. Its October 2025 announcement also said existing collections carry over and the free tier stays, so your library is not tied to a paid plan. Features that are RR+ only, such as using more than 50 seeds, would no longer be available.
What is the best free ResearchRabbit alternative?
It depends on the job. Semantic Scholar is fully free for search, Litmaps has a free plan for citation maps with up to 20 inputs, and Elicit and Consensus have free tiers for summarizing and answering questions from papers.
