What are the best AI tools for literature review?
The best AI tools for literature review in 2026 are Undermind, ResearchRabbit and Litmaps. Use Undermind for deep searches and cited write-ups, ResearchRabbit to explore from papers you trust, and Litmaps for citation maps and alerts. All three have a free plan.
Prices below come from each official pricing page, checked on 14 November 2026. We have not tested these tools hands-on. Details: Undermind, ResearchRabbit, Litmaps.
How do the three tools compare?
| Undermind | ResearchRabbit | Litmaps | |
|---|---|---|---|
| Main idea | Deep search, full-text reading, cited write-ups | Start from a seed paper, expand to related work | Citation maps, alerts, sharing |
| Free plan | Yes, with standard rate limits | Yes, forever: unlimited searches and library, up to 50 seed articles | Yes: up to 20 inputs, 100 articles, 1 Litmap, no collaboration |
| Paid price | Pro $16/mo billed annually; Team $15/person/mo billed annually | ResearchRabbit+ $10/mo (annual or monthly toggle) | Pro Education $10/mo annual ($12.50 monthly); Pro Commercial $40/mo annual ($50 monthly) |
| Writes the review for you? | Drafts a write-up with citations | No, discovery only | No, discovery and mapping only |
| Best for | Deep technical reviews | Exploring a field from known papers | Visual maps and monitoring a topic |
Which AI tool is best for finding papers on a new topic?
Undermind describes itself as an AI co-researcher for scientific literature. It runs a deep search over thousands of papers, ranks what is relevant, reads open-access full texts including figures, and can draft a research write-up with citations. A search takes a few minutes. Its claim that it finds twice as many relevant papers as AI web search comes from the company, not from an independent test. It is built for scientific literature, not general web research.
Which tool is best if you already have a few key papers?
ResearchRabbit turns a paper you already know into a map of related work, authors and topics, and keeps a recommendation feed that adapts as you explore. The free plan has unlimited searches and library; the limit is 50 seed articles. ResearchRabbit+ raises that to 300 and adds multiple projects and alerts. It does not write the review for you. The homepage and pricing page quote different paper counts (320 million vs 310+ million), both vendor figures.
Which tool is best for citation maps and alerts?
Litmaps finds papers by their citation connections and lays them out as a visual map you can annotate and share. Free is limited to 100 articles and one Litmap. Pro adds unlimited inputs, articles and maps, advanced discovery tools and daily or configurable alerts. Education pricing needs an academic email; the commercial Pro plan costs four times as much. Litmaps and ResearchRabbit both name Litmap Limited in their copyright lines.
Is there an AI literature review generator?
Of these three, only Undermind drafts a research write-up with citations, and its site says every citation is verified. ResearchRabbit and Litmaps help you find and map papers but do not write the review. Other tools also advertise literature review generators; we have not reviewed them here. Treat any generated draft as a starting point and check every citation in the original paper.
How do you choose the right literature review tool?
- Starting from zero on a technical topic: try Undermind’s free plan first.
- You already have 3-5 key papers: ResearchRabbit’s free plan fits well.
- You want a visual overview and email alerts, and have an academic email: Litmaps Pro Education at $10/mo is the cheapest paid option here.
- On a budget: all three have a free plan, so test with one real topic before paying.
Frequently asked questions
Are Undermind, ResearchRabbit and Litmaps free?
Each has a free plan with limits: Undermind has standard rate limits, ResearchRabbit allows up to 50 seed articles, and Litmaps allows 100 articles and 1 Litmap (checked 14 Nov 2026).
Which is cheapest to upgrade?
ResearchRabbit+ and Litmaps Pro Education are both listed at $10/mo. Undermind Pro is $16/mo billed annually. Litmaps Pro Commercial is $40/mo billed annually.
Can these tools write my literature review?
Only Undermind drafts a write-up, and its site says citations are verified. ResearchRabbit and Litmaps focus on discovery. Always check citations in the original papers before you publish.
Are ResearchRabbit and Litmaps the same company?
Both official sites name Litmap Limited in their copyright lines, but they are separate products with different features and pricing.
Prices and limits come from each official site and were checked on 14 November 2026; they can change. We did not test these tools hands-on. No ads, no pay-to-rank: see our promise. Browse more in our Research tools category.