11 Best Literature Review Software in 2026, Compared

Zotero is the default starting point for a literature review because the core app costs nothing and does the unglamorous work well: capture a paper from the browser, file it in a collection, tag it, annotate the PDF and cite it in Word or Google Docs in one of more than 9,000 styles. Your bibliographic data syncs without limit; only PDF attachments count against the 300 MB free storage allowance.

The trade-off is that Zotero is a library, not a review workflow. It will not screen papers against inclusion criteria, run a PRISMA flow or summarise a paper for you — for those jobs pair it with Rayyan, Covidence or SciSpace below, and Zotero exports to all of them. If you only buy one thing, make it the $20-a-year 2 GB storage tier once your PDFs pass 300 MB.

Covidence is the systematic-review standard because it turns the whole review into one guided workflow instead of a pile of spreadsheets. Two reviewers screen each title and abstract independently, conflicts get resolved inside the tool, and the same flow carries through full-text review, data extraction, quality assessment and a PRISMA diagram. Cochrane has recommended it for new reviews since 2017, and it is free for Cochrane reviews.

The price is the honest catch. At $339 a year for a single review with unlimited collaborators, a funded team gets good value — five reviewers cost the same as one — but a self-funded student running two reviews pays $678 a year with no student discount. Check first whether your university already holds a licence; many do, and that changes the maths completely.

Rayyan is the cheapest way into team screening, and its free plan is genuinely usable: three active reviews, two free reviewer invites, duplicate detection and AI relevance ratings that sort the most promising abstracts to the top as you decide. Blind mode is on by default, so reviewers cannot see each other's decisions, and the mobile app lets you screen a batch of abstracts on the train.

The limits are clear and fair. The free plan has no PRISMA diagram and no automatic duplicate removal, so a formal review will need Essential at $4.99 a seat a month billed annually. Extraction and risk-of-bias assessment wait until Advanced at $8.33 a seat a month billed annually. For a small team on a tight budget, Rayyan plus Zotero is the lowest-cost serious combination in this list.

SciSpace is the budget AI workspace in this list: one subscription for paper search, PDF chat and literature-review extraction, built on a corpus of more than 280 million papers. Ask it a research question and it returns papers with cited extractions you can compare side by side; open a PDF and the Copilot explains the dense passages in plain language, with every claim traced back to the source page.

The credit system is the thing to understand before you pay. Premium gives 1,200 Agent credits a month, and each agent task spends them — heavy review work can burn through the allowance, and unused credits do not roll over. At $12 a month billed annually it is still the cheapest AI review tool here, but treat its summaries as a first draft and verify the extraction against the paper.

Elicit is the one AI tool in this list built for a formal systematic review rather than a quick literature search. Give it your inclusion criteria and it screens thousands of papers, then extracts the findings into a cited table with up to 20 columns at a time on Pro. Reports pull from up to 135 sources, and Routines automate repeatable searches across reviews.

The price needs care. The pricing page defaults to Industry rates, where Pro is $75 a month billed monthly or $49 billed annually; switch the filter to Academic and Pro drops to $39 a month billed annually with five times the usage. A solo researcher outside a university pays the Industry rate, which makes Elicit the priciest AI tool here — worth it only when the review runs to thousands of papers.

Mendeley is Elsevier's free reference manager, and its free plan is the most generous of the reference managers here: 2 GB of storage, full PDF annotation, citation plugins for Word and collaborative groups. The Reading Assistant answers questions about a paper, and on Pro and Max the Ask My Library feature answers questions across your whole library at once.

The paid tiers are a storage and AI ladder rather than a new product — Plus at $4.99 a month buys 5 GB and unlimited Reading Assistant questions, Pro at $9.99 buys 10 GB, and Max at $14.99 buys unlimited storage. If you already live in Zotero, there is little reason to switch; if you want more free storage and a friendlier first week, Mendeley is the easier start.

EndNote is the long-running desktop reference manager from Clarivate, and it still wins one job outright: citing inside Microsoft Word at scale. Cite While You Write offers thousands of output styles with custom editing, the library handles thousands of references without slowing down, and duplicate detection runs automatically on import. EndNote 2025 adds a Research Assistant that summarises papers and translates selected text.

The price is the reason most new researchers skip it. A full licence is $275 one-time, against $150 for a verified student licence and $125 to upgrade from an earlier version; some pages show a discounted $206 full licence, so check the buy page before paying. Buy EndNote when your department or journal demands its styles, or when your library already holds a licence — otherwise Zotero does the same job for free.

DistillerSR is the enterprise end of systematic review software: it automates every stage of a review, from literature collection and triage through assessment to reporting, with configurable workflows and an audit trail that regulated teams can defend. PubMed integrations and AI-powered duplicate detection keep very large searches reproducible, and the API connects the review to the rest of a team's evidence pipeline.

For most buyers the pricing page is the problem, not the product. Corporate and government pricing is a custom quote, so only the $19.95-a-month student plan is published — third-party directories list $215 per user per month, but DistillerSR does not publish that figure itself. If you are a student, the student plan is a bargain; if you are buying for a company, expect a sales conversation and a quote in the thousands a year.

Litmaps turns a literature review into a map. Seed it with a few papers and it draws the citation network around them across a database of more than 270 million articles, showing which papers are most influential, where the field clusters and where the gaps are. Pro adds configurable literature alerts, so new papers matching your topic land in your inbox instead of waiting for your next search.

The price depends entirely on who you are. Pro Education is $12.50 a month billed monthly or $10 billed annually, with 75% off for students and academics holding an academic email; Pro Commercial is $50 a month billed monthly or $40 billed annually. The free plan's two maps of 100 articles each are enough to test the workflow, but an active review will outgrow them within weeks.

Connected Papers does one thing well: give it a paper — a DOI, an arXiv link, a PubMed URL or just a title — and it builds a similarity graph of the papers most closely related to it, even when they never cite each other. Each graph covers about 50 papers; Prior Works and Derivative Works show the foundational papers behind your seed and the follow-up work it spawned.

The pricing is simple. The free plan includes every feature and stops at five graphs; Academic at $6 a month billed annually removes the cap for academic, non-profit and personal use, and Business at $20 a month billed annually does the same for commercial work. Prices vary by country, so confirm the checkout total — for a quick map, the free tier is often all you need.

ResearchRabbit is the free discovery tool in this list, relaunched by Litmaps in October 2025 as ResearchRabbit 2.0. Add a handful of seed papers and it maps the field around them — similar work, earlier work, later work, references, citations and authors — across more than 310 million articles. The Free Forever plan includes unlimited searches and collections, with up to 50 seed articles and one project.

The paid tier, RR+, raises the cap to 300 seeds and adds advanced search, multiple projects, Signals retraction alerts and faster support. One warning: the vendor's own pages disagree on the price — $10 a month in some places, $12.50 in others — with annual billing at $120 a year, so confirm the checkout total before paying. For exploring a new field on no budget, the free plan alone is hard to beat.