Nested Knowledge vs Rayyan (2026): which should you pick?
As of Nov 13, 2026, Rayyan grades higher than Nested Knowledge: 2.6 against 2.0 out of 4.0.
Checked Nov 12, 2026 and Nov 13, 2026 · graded Nov 12, 2026 and Nov 13, 2026 by ToolGPA
Rayyan grades higher on value for money and features. They get the same grade on the free plan, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Nested Knowledge
Systematic review and meta-analysis platform with AI screening
Rayyan
Systematic review screening with AI relevance predictions
Which one is for you
Pick Nested Knowledge if
- Fits if you run a systematic review alone and want to start free
- Works for academic teams who would pay the Academic seat price
Look elsewhere if
- Not for you if you work as a team on the free tier, as free users cannot be invited to a shared project
- Pricey if you are a company at $295 or $695 per user a month
- Tight if you want the AI screening, which needs Academic+ at $69.95 or higher
- Watch out: after cancelling, projects stay viewable and exportable but cannot be updated
Pick Rayyan if
- Fits if you're a student or researcher screening for a review without a budget
- Works for small review teams that need the duplicate check and AI ranking
Look elsewhere if
- Tight if you stay free: 3 active reviews and 2 free reviewers
- Pricey if you're an institution, as ResearchPilot AI is Business at $2,500 a year from 5 licenses
- Watch out: PRISMA diagrams need Essential, and PICO extraction needs Advanced
- Watch out: SSO and API access are on the Enterprise plan only
- Watch out: the mobile app is limited on Free, and its platforms aren't listed
How we grade them
| 2.0GPANested KnowledgeFair | 2.6GPARayyanGood | |
|---|---|---|
| Value for money | DAcademic is $19.95 per user a month, above the category's $14 dearer-quarter line. The AI features sit on Academic+ at $69.95, and commercial seats are $295 and $695. | BEssential is $4.99 a seat a month billed yearly, and Advanced is $8.33. That's in the cheapest quarter, which starts at $7.50 for the category. Business is $41.67 per license, from 5 licenses. |
| Free plan and trial | BOne review project is free, with no time limit and no card, and one person can finish a review on it. Collaboration is not available. | BFree forever with 3 active reviews, 2 free reviewers, a sample, duplicate detection and AI relevance predictions. One reviewer can live on that. |
| Features | CScreening, extraction, synthesis, living reviews and AI tools. The listing shows collaboration and the full AI suite locked behind paid seats. | BScreening, duplicate detection, team samples, PRISMA diagrams, PICO extraction and risk-of-bias tools. Nothing in the listing shows a gap in screening itself, but PRISMA and PICO sit on paid plans. |
| Ease of use | CNo store rating on record, and a review needs a project built and set up before anything works. | CNo store rating on record. You set up a review, invite reviewers and run the samples. |
| Platforms and integrations | CWeb only, linking PubMed, Embase and Unpaywall. No apps are listed. | CWeb, with a mobile app mentioned but no platforms listed. SSO and API access are Enterprise only, and no integrations are listed. |
| Best for | running a systematic review with AI help | screening papers for systematic reviews |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Nested Knowledge and Rayyan. How we grade
Price against what you get
Nested Knowledge starts at $19.95 a month for each person and scores 2.0 out of 4 on features, ease of use and platforms. Rayyan starts at $4.99 a month for each person and scores 2.3.
Rayyan scores higher and starts $14.96 a month lower. Of the other AI research tools on the chart, 39 score higher than Nested Knowledge for less, and 5 score higher than Rayyan for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Nested Knowledge also covers reports.
- Rayyan also covers citations.
At a glance
| Nested Knowledge | Rayyan | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $19.95 per user / month (Academic) | $4.99 per seat / month, billed annually ($8.33 billed quarterly) |
| Free plan | Your first Nest, an entire review project, is free with no time limit and no card; collaboration is not available on the free tier. | Free forever: 3 active reviews, 2 free reviewers, 1 sample, duplicate detection and AI relevance predictions. |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Nested Knowledge | Rayyan |
| Price read from | about.nested-knowledge.com | rayyan.ai |
| Checked | Nov 13, 2026 | Nov 12, 2026 |
Worth knowing
Nested Knowledge
- Collaboration needs paid seats for every collaborator; free-tier users cannot be invited to a shared Nest.
- Commercial plans are $295 or $695 per user a month, and annual billing is offered at checkout without a published price.
- Prices are tax-exclusive, and Stripe self-service checkout is monthly or annual.
- After cancelling, existing Nests stay viewable and exportable but can no longer be updated.
Rayyan
- The free plan stops at 3 active reviews and 2 invited free reviewers.
- ResearchPilot AI, 250 reviewers and organization-wide management need the Business / Academic plan, sold from 5 licenses.
- SSO / SAML and API access are listed only on the Enterprise plan.
- The site mentions a mobile app, but the pages read do not say which platforms it covers.
Key features
Nested Knowledge
- AutoLit review workflow
- Structured searches across PubMed and Embase, plus single or dual screening, tagging, meta-analytic extraction and critical appraisal.
- Smart AI features
- Smart Search builds Boolean strings from a question, Robot Screener acts as a second reviewer, and Smart Tags extract data.
- Synthesis outputs
- Builds PRISMA diagrams, forest plots, network meta-analysis and summary tables that update as new data is added.
- Living reviews
- Searches can be re-run and versioned, so a review can be kept current as new studies appear.
- Full text management
- Imports full texts from sources such as Unpaywall or a local computer and matches them to records.
- AI rapid reviews
- Takes a research question and orchestrates search, screening, extraction and appraisal, which a person can then refine.
Rayyan
- Screening with AI relevance predictions
- Reviewers include or exclude references while the tool predicts relevance. Every plan, including the free one, lists AI relevance predictions.
- Duplicate detection
- Duplicate detection is on every plan. Auto-resolving duplicates is listed from the Essential plan up.
- Team workbench and samples
- Reviews can be divided between team members and randomized into samples, with more than 15 workbench facets for analyzing decisions.
- PRISMA diagrams and PICO extraction
- PRISMA flow diagrams start on Essential. Advanced adds AI extraction of PICO data.
- Risk-of-bias tools
- The Advanced plan lists the Newcastle-Ottawa Scale and the Mixed Methods Appraisal Tool, and the site announces a Risk of Bias feature.
- ResearchPilot for institutions
- The Business / Academic plan and above include ResearchPilot, which the site describes as AI search, screening and extraction for institutions.
Plans
Nested Knowledge
Free$0
One review project (Nest) to run an entire systematic review, single user.
Academic$19.95
per user / month
Collaborative workflows for non-profit research organizations, universities or buyers in low- and middle-income countries.
Academic+$69.95
per user / month
Everything in Academic plus the full suite of AI features.
Business Essentials$295
per user / month
Collaborative workflows with unlimited Nests; Smart Search and some AI features by plan.
Enterprise$695
per user / month
Business Essentials plus the AI features, such as Smart Screener and Adaptive Smart Tags.
Enterprise PlusCustom
Enterprise plus premium research support; contact sales.
Rayyan
Free$0
3 active reviews, 2 free reviewers, 1 sample, limited mobile app access, duplicate detection and AI relevance predictions.
Essential$4.99
per seat / month, billed annually ($8.33 billed quarterly)
Adds PRISMA flow diagrams, 5 free reviewers, auto-resolved duplicates and unlimited mobile app access.
Advanced$8.33
per seat / month, billed annually ($13.33 billed quarterly)
9 active reviews, 10 free reviewers, unlimited samples, AI extraction of PICO data, priority support and extra risk-of-bias tools.
Business / Academic$41.67
per license / month, billed annually
Starts at 5 licenses ($2,500 a year), sold through sales. Adds ResearchPilot AI, 250 free reviewers and 50 organization-wide reviews.
EnterpriseCustom
Unlimited reviews, SSO / SAML, API access, a management console and dedicated support.
Ways to pay less
Nested Knowledge
- Education
Academic and student pricing
Academic plans at $19.95 or $69.95 per user a month for universities, non-profit researchers and low- and middle-income countries.
Rayyan
- Annual discount
Save up to 40% with annual billing
The pricing page says annual plans save up to 40% against quarterly billing; Essential is $4.99 a seat annually against $8.33 quarterly.
- Education
Discounts for academic institutions
The pricing page notes that discounts are available for academics on the Business / Academic plan.
Common questions
Which is cheaper, Nested Knowledge or Rayyan?
As of Nov 13, 2026, Rayyan is cheaper to start with: $4.99 a month for each person, against $19.95 a month for each person for Nested Knowledge. Nested Knowledge starts at $19.95 per user / month (Academic), and Rayyan starts at $4.99 per seat / month, billed annually ($8.33 billed quarterly).
Which has a free plan, Nested Knowledge or Rayyan?
As of Nov 13, 2026, both Nested Knowledge and Rayyan have a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.