Rayyan vs Capacities
A detailed comparison to help you choose between Rayyan and Capacities.
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Verdict: Rayyan wins
Rayyan scores 4.2/5, edging out Capacities at 4.1/5. Health and evidence-synthesis teams — from student pairs to institutional units — running collaborative blinded screening for systematic reviews and meta-analyses.
Rayyan AI systematic review tool for researchers | Capacities AI note-taking with object-based structure | |
|---|---|---|
| Rating | 4.2 (1 review) | 4.1 (1 review) |
| Pricing Model | freemium | freemium |
| Starting Price | Free tier available | Free tier available |
| Best For | Health and evidence-synthesis teams — from student pairs to institutional units — running collaborative blinded screening for systematic reviews and meta-analyses. | Solo knowledge workers, researchers and writers who want structured, object-based notes with strong daily capture and zero workspace-building overhead. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | free tierteam features | free tier |
| Visit Rayyan → | Visit Capacities → |
Rayyan
Pros
- + Zero-shot AI relevance predictions genuinely reorder the screening queue — relevance ranking appeared within seconds of import in my testing with no training examples
- + Blinded duplicate screening with conflict resolution and dedup that caught conference-abstract/journal-article near-duplicates my DOI pass missed
- + Workable free tier: 3 active reviews, 2 reviewers, duplicate detection and AI predictions included — enough for a real first review
- + PRISMA flow diagram generation (Essential+) saves hours of manual diagramming per review
- + Cheap paid seats — $4.99/seat/month billed annually per third-party listings, $8.33/month billed quarterly per rayyan.ai at time of writing
Cons
- - AI predictions prioritize the queue but must not replace human duplicate screening decisions — no trustworthy auto-inclusion
- - Not a literature-search tool: does not run database searches or find studies for you
- - Advanced form customization and branching logic are thinner than DistillerSR/EPPI-Reviewer-class enterprise tools
- - Healthcare/medical-first user base and templates; other fields work but the community flavor is clinical
- - Pricing signals conflict across third-party listings versus the vendor page — verify before budgeting
Capacities
Pros
- + The object model removes setup: backlinks and properties did the filing for me by week two, without building a folder system first
- + Capture from Telegram and email landed objects in the right place without opening the app — frictionless capture is real here
- + Full free tier: unlimited objects, spaces, blocks and custom types with offline access; you can use it as a primary notes app without paying
- + AI changes (created objects, rewritten blocks) are shown for review before applying, and /Ask AI works inline in any note
- + MCP and public API let ChatGPT, Claude and Cursor search and update your objects directly; Readwise and Kindle import on Pro
Cons
- - No real-time collaboration — view-only sharing and public pages exist, but no co-editing, comments or shared team databases
- - AI usage is metered beyond a light monthly budget; Pro plus the Plus power-up reaches $18.32/month billed annually before top-ups
- - Free plan media storage is capped at 5GB total, then 100MB/month — a real ceiling for PDF and audio-heavy libraries
- - PDF annotation is still listed at beta level (Believer tier) in the vendor's own comparisons — verify current state before relying on it
- - The object mindset takes a couple of weeks to click, and complex Notion setups do not migrate one-to-one
Frequently Asked Questions
Which is better, Rayyan or Capacities?▼
Rayyan scores higher at 4.2/5 vs 4.1/5 for Capacities, making it the better-rated option in our comparison.
What is the difference between Rayyan and Capacities?▼
Rayyan: Rayyan helps research teams screen and sort citations for systematic literature reviews, with collaborative inclusion and exclusion decisions. Capacities: Personal knowledge management tool with object-based architecture that lets AI help you create and connect notes visually.
Is Rayyan or Capacities more affordable?▼
Rayyan starts at €0/mo, Capacities starts at €0/mo. Check the comparison table above for current pricing.
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