Rayyan vs Sysrev
Rayyan scores 6.0 to Sysrev's 4.0 among the systematic review platforms we rate, and is the better pick for 3 of the 5 kinds of buyer below.
Rayyan wins, 6.0 to 4.0
Sysrev searches PubMed and OpenAlex directly inside the app, where Rayyan only imports references you already found elsewhere. Rayyan counters with automatic reference deduplication, a PRISMA flow diagram, and an announced risk of bias assessment, none of which Sysrev offers, plus a mobile app that Sysrev lacks. Rayyan's cheapest paid plan is $8.33 a month, billed quarterly; Sysrev costs $50 a month per member.
Pick Rayyan if you need deduplication, PRISMA, risk of bias and a mobile app.
Pick Sysrev if you want to search PubMed and OpenAlex without importing first.
Best for
Who each one suits, decided on the criteria that matter to that buyer and the checked facts where the two differ.
- Searches a database of papers: Sysrev yes, Rayyan no
- But Rayyan leads on answers a research question from the literature: Rayyan yes, Sysrev no
- Ask questions of a paper: Rayyan yes, Sysrev no
- Answers show the passage they came from: Rayyan yes, Sysrev no
- Removes duplicate references: Rayyan yes, Sysrev no
- PRISMA flow diagram: Rayyan yes, Sysrev no
- Risk of bias assessment: Rayyan yes, Sysrev no
- Monthly price, cheapest paid plan: $8.33 against $50
- Works with Zotero, Mendeley, EndNote and others: EndNote, Zotero against None
- But Rayyan leads on mobile app: Rayyan yes, Sysrev no
How they score
Both are scored the same way, against the other systematic review platforms we rate, from facts on each vendor's own pages. Rayyan leads on 4 of 6 criteria.
Where they differ
Every point where the two vendors' published facts disagree, with a link to where each fact was read. "Not published" means the vendor does not say either way.
Published by only one of them
Where they match (16)
Pricing, plan by plan
Every plan each vendor publishes, monthly and yearly where both are offered.
Rayyan
Sysrev
Pros and cons
From each tool's full review, written from the same checked facts.
Rayyan
- The Systematic Auto-Resolver deduplicates references quickly using a configurable protocol, solving one of the most tedious parts of multi-database systematic reviews.
- ResearchPilot AI provides zero-shot relevance ratings, meaning it can score reference relevance without requiring training examples from the user.
- Auto-generated PRISMA flow diagrams save researchers hours of manual charting work.
- The AI Reviewer feature allows users to interactively query their reference set, enabling more dynamic literature exploration.
- Auto-extract data function pulls structured information from included studies, which is especially valuable in later-stage reviews.
- Over one million researchers at more than 30,000 institutions use it, reflecting genuine adoption rather than inflated free-signup numbers.
- Programmable hot keys and data sampling tools for randomized subsets help speed up screening and distribute workloads across teams.
- A free tier is available that provides meaningful functionality, including access to the deduplication feature.
- Rayyan is not listed on G2 or Capterra, making it harder to find aggregated, verified user reviews for independent evaluation.
- The tool does not perform its own database searches — users must import references manually from external sources like PubMed or Embase in RIS or BibTeX format.
- The AI-driven features are built around a proprietary system called ResearchPilot, which limits transparency into how relevance scoring and extraction decisions are made.
- It is designed for a very specific use case — systematic review screening — and is not a general-purpose research or literature discovery tool.
- Academic forum coverage is the primary source of user feedback, suggesting limited mainstream visibility and potentially slower support or feature communication.
Sysrev
- Supports a wider range of input formats than most competitors, including PDFs, title-abstract pairs, plain text, and structured JSON.
- The AI Auto Labeler automates document labeling, reducing manual workload for large document sets.
- Human-in-the-loop review structure allows teams to verify and correct AI-flagged labels before finalizing.
- Multi-phase project setup allows outputs from one project to feed directly into the next, supporting complex review workflows.
- Multiple reviewers can collaborate on the same project simultaneously, enabling team-based systematic reviews.
- Supports structured data extraction including Boolean fields, categorical labels, string extraction, and tabular data.
- Has been operational since 2017, suggesting a degree of platform maturity and stability for academic use cases.
- No general web search, though PubMed and OpenAlex search are built in, for other sources, users must supply their own documents.
- Almost no presence on major third-party review platforms like G2, Capterra, or Trustpilot, making independent validation difficult.
- The scope is narrower than the homepage suggests, as it is not a general-purpose AI research assistant.
- Primarily suited to academic, scientific, and regulatory use cases, limiting its appeal for broader research workflows.
- The lack of community discussion and public reviews makes it hard to assess real-world reliability and support quality.
Rayyan vs Sysrev: common questions
Which is better, Rayyan or Sysrev?
Rayyan scores 6.0 and Sysrev 4.0 out of 10 among the systematic review platforms we rate. Rayyan is ahead on reading and analysing papers, systematic reviews, pricing and access, teams and privacy. Sysrev is ahead on finding papers and citing and writing.
Is Rayyan or Sysrev cheaper?
Rayyan's cheapest paid plan is $8.33/mo (billed quarterly; no monthly plan exists) and Sysrev's is $50/mo. Compare what each plan includes below before going on price alone.
What can Rayyan do that Sysrev cannot?
On the facts both vendors publish: answers a research question from the literature, ask questions of a paper, answers show the passage they came from, removes duplicate references, pRISMA flow diagram, risk of bias assessment, mobile app and works in languages other than English.
What can Sysrev do that Rayyan cannot?
On the facts both vendors publish: searches a database of papers.
