NEW!
Built for evidence synthesis teams who care about validity, transparency & reproducibility
Risk of Bias assessment is one of the most consequential steps in a systematic review. Weak or inconsistent judgments can distort conclusions, reduce confidence in findings, and compromise downstream evidence synthesis. Rayyan’s Risk of Bias workspace helps review teams conduct structured, transparent, and reproducible assessments using established methodologies, without losing the flexibility required for real-world research.
Risk of Bias assessment is one of the most critical — and time-consuming — stages of a systematic review. Many teams still manage assessments in disconnected spreadsheets or external tools, making it difficult to:
As reviews scale, fragmented workflows increase the risk of inconsistency, missing data, and reduced transparency.
Rayyan enables teams to perform structured Risk of Bias assessments directly within the systematic review workflow, keeping evaluations connected to studies, reviewers & screening decisions in a centralized environment. Review teams can:
This helps researchers improve methodological transparency while accelerating review completion.
Researchers must:
Traditional workflows spread this work across spreadsheets, PDFs, comments, and disconnected tools. Rayyan centralizes the process into a single collaborative environment designed specifically for evidence synthesis teams.


Supported and configurable approaches include:
Whether your review involves randomized trials, observational studies, diagnostic accuracy studies, or mixed evidence, Rayyan adapts to your methodology.
Rayyan enables reviewers to:
This creates a defensible and reproducible record of how decisions were made.
Example Workflow:


Rayyan supports stronger reviewer calibration through:
The platform helps teams apply frameworks more consistently while preserving the expert judgment required for nuanced appraisal.

Rayyan enables distributed teams to:
From small academic groups to enterprise evidence synthesis programs, teams can coordinate assessments without fragmented documentation.


Rayyan maintains:
This supports:

Rayyan helps researchers move beyond:
Instead, teams gain a structured environment purpose-built for rigorous evidence evaluation.

Structured workflows are helpful. Defensible judgments are essential.
Rayyan helps evidence synthesis teams conduct rigorous, transparent, and reproducible Risk of Bias assessments at scale.