Rayyan
Built for systematic reviews — thousands of abstracts screened by a team, with blinding and conflict resolution built into the workflow.
Built for systematic reviews — thousands of abstracts screened by a team, with blinding and conflict resolution built into the workflow.
The categories Rayyan is listed in, and how strong a fit it is in each.
Web research, deep research, books, academic papers, citations, news, fact-checking.
Rayyan has a free plan. Free forever, pitched at your first systematic review rather than as a trial
Rayyan began at the Qatar Computing Research Institute in 2014 and was spun out as a US company in 2020. It is used for systematic reviews at institutional scale.
Tools that do comparable work, best fit first, drawn from the catalogue rather than hand-picked. Every one is listed whether or not there is money in it for us.
Builds a similarity graph from citation data rather than from a language model, so nothing in the output is generated and there is nothing to hallucinate.
View Connected Papers →Searches published papers and tells you how many of them support a claim, which turns a yes-or-no question into a count you can inspect.
View Consensus →Searches actual papers and extracts findings into a table you can check, one row per study, rather than answering in prose.
View Elicit →Scoped to clinical evidence and built with practising clinicians, so the filters match how medical literature is actually appraised.
View EvidenceHunt →Runs a multi-step search across dozens of sources and returns a structured, referenced report. Strong first pass on an unfamiliar field.
View Gemini Deep Research →You upload the sources and it answers only from them, linking every sentence to the passage it came from. The strongest verification pattern here.
View Gemini Notebook →Where Rayyan sits in the wider category pages.
Built for this — Web research, deep research, books, academic papers, citations, news, fact-checking.
Yes — Free forever, pitched at your first systematic review rather than as a trial. The cheapest paid tier is Essential, at $8.33/mo quarterly month to month or $4.99/mo billed yearly.
Built for systematic reviews — thousands of abstracts screened by a team, with blinding and conflict resolution built into the workflow. It is listed under Search, Research & Academics, and this is what it is built for.
Overkill for anything smaller than a formal review. Individual seats are cheap, but the institutional tier starts at 5 licenses for $2,500 a year. Rayyan's own page swaps the descriptions of Essential and Advanced between its billing tabs, so read the feature list rather than the blurb.
6 tools do comparable work: Connected Papers, Consensus, Elicit, EvidenceHunt, Gemini Deep Research, Gemini Notebook. 6 of them have a free plan.
Checked by hand on 4 September 2026. Prices change often — confirm on the provider's own page before spending.