PetalFree plan
Paid from
$4.25 a month
View plans and limitsUpdated 4 September 2026 · Independent comparison
Petal vs Rayyan:
which should you use?
Petal and Rayyan, side by side. Find the one that fits what you need to do.
Find your best fitThe 30-second answer
Petal a document library with AI built in rather than a chat window you paste into, so your sources stay organised between sessions.
Rayyan is built for search, research & academics.
Pricing, simplified
Start free. Upgrade when you need more.
RayyanFree plan
Paid from
$8.33 a month
View plans and limitsThe 30-second comparison
If you only read one section, make it this one. Rows where both sides say the same thing are left out — the point is where they differ. Where each row came from is listed underneath.
| Category | Petal | Rayyan | Better fit |
|---|---|---|---|
| What it's built for | A document library with AI built in rather than a chat window you paste into, so your sources stay organised between sessions. | Built for systematic reviews — thousands of abstracts screened by a team, with blinding and conflict resolution built into the workflow. | Rayyan |
| Fit for search, research & academics | Strong fit | Built for this | Rayyan |
| Free plan | Yes. Free, with 1GB of cloud storage, one seat and three guests. Support is included rather than priority | Yes. Free forever, pitched at your first systematic review rather than as a trial | Tie |
| Cheapest way to pay | $4.25 a month. | $8.33 a month. | Petal |
| What the paid tiers cost |
|
| Tie |
| What to watch out for | You have to commit to keeping documents in it for the value to appear. The individual tiers are separated by storage rather than by features, and the two cheapest are priced for .edu addresses — without one they cost around two thirds more. | 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. | Tie |
| Who it is usually for | researchers, working professionals, students | researchers | Tie |
| Made by | Petal — Cambridge, US. | Rayyan Systems — Cambridge, US. | Tie |
Rayyan is ahead on 2 of the 8 rows compared, 2 of them about how well it does the job itself, against 1 to Petal. That is a clear lead rather than a tiebreaker.
Rayyan
Built for systematic reviews — thousands of abstracts screened by a team, with blinding and conflict resolution built into the workflow.
✓ The job is mainly search, research & academics
✓ Built for systematic reviews — thousands of abstracts screened by a team, with blinding and conflict resolution built into the workflow.
✓ It is built for search, research & academics
✓ Free forever, pitched at your first systematic review rather than as a trial
A document library with AI built in rather than a chat window you paste into, so your sources stay organised between sessions.
Petal is the better answer when the job is what it was built for rather than what the pick above does broadly.
✓ A document library with AI built in rather than a chat window you paste into, so your sources stay organised between sessions.
✓ You want the cheaper paid plan, $4.25 against $8.33
✓ You are among working professionals or students
✓ Free, with 1GB of cloud storage, one seat and three guests. Support is included rather than priority
How we know
Every row that separated these two, and where it came from. Nothing here is a hands-on test — if a line rests on a vendor’s own pricing page, it says so and links it.
| Row | Favours | Weight | Where it came from |
|---|---|---|---|
| What it's built for | Rayyan | How well it does the job | From this site’s own catalogue record for each product — compiled by hand, not imported. How a product gets listed |
| Fit for search, research & academics | Rayyan | How well it does the job | Both products are listed under search, research & academics in the catalogue, and this is the fit recorded against each listing. Everything listed under search, research & academics |
| Cheapest way to pay | Petal | Everything else | From each vendor’s own pricing page. Dates and pages are listed below. |
The prices
Petal. Read by hand on 4 September 2026, because Petal cannot be read automatically: Plans live at /resources/pricing, not /pricing, which 404s. Still drawn in JavaScript, so transcribed by hand; re-verify the same way. petal.org/resources/pricing
Rayyan. Read by hand off rayyan.ai on 4 September 2026. It is not on the monthly re-check, so confirm there before paying. rayyan.ai/pricing
The ratings
The category these two share. Search, Research & Academics — both are listed there in the catalogue, and the fit recorded against each listing is a judgement made here, by hand.
The nine-category grid below. Derived from what each product is listed for, by one script, once per build — so the same pair always reads the same. It is a derivation, not a review.
What this is not
Neither product was run side by side to produce this page. Nobody was paid to appear on it and nothing here is ranked by commission.
To put the same question to both and read the answers yourself, run them side by side — that is a live test, and this is not.
Choose based on what you’re doing
All ten categories, including the ones where neither of these is the answer. These ratings are derived from what each product is listed for, not from running it — a rating here is a reading of the record, and the record is linked.
01
General-Purpose AI Assistants
Questions, brainstorming, explanations, everyday tasks, decision-making, general advice.
Petal
Not a good fitRayyan
Not a good fitBest choice: Neither
02
Search, Research & Academics
Web research, deep research, books, academic papers, citations, news, fact-checking.
Petal
Good fitRayyan
Built for thisBest choice: Rayyan
03
Writing, Communication & Language
Emails, reports, essays, editing, summarizing, translation, presentations.
Petal
Not a good fitRayyan
Not a good fitBest choice: Neither
04
Coding, Data & Technical Work
Programming, debugging, data analysis, spreadsheets, math, engineering, technical research.
Petal
Bad fitRayyan
Bad fitBest choice: Neither
05
Business, Finance & Professional Work
Business strategy, investing, market research, legal, sales, HR, accounting, consulting.
Petal
Not a good fitRayyan
Not a good fitBest choice: Neither
06
Image & Design
Image generation, photo editing, logos, graphics, product design, advertising creatives.
Petal
Bad fitRayyan
Bad fitBest choice: Neither
07
Video
Video generation and editing, clipping, subtitles, avatars, animation and motion capture.
Petal
Bad fitRayyan
Bad fitBest choice: Neither
08
Audio, Voice & Music
Voice generation, transcription, music, dubbing, sound cleanup and podcast production.
Petal
Bad fitRayyan
Bad fitBest choice: Neither
09
Marketing & Content Creation
Social media, SEO, advertising, copywriting, content ideas, scripts, brand development.
Petal
Bad fitRayyan
Bad fitBest choice: Neither
10
Productivity, Automation & Personal Life
AI agents, workflows, scheduling, meetings, organization, shopping, travel, personal finance.
Petal
Not a good fitRayyan
Not a good fitBest choice: Neither
A document library with AI built in rather than a chat window you paste into, so your sources stay organised between sessions.
Cambridge, USA document library with AI built in rather than a chat window you paste into, so your sources stay organised between sessions.
You want the cheaper paid plan, $4.25 against $8.33
You are among working professionals or students
Free, with 1GB of cloud storage, one seat and three guests. Support is included rather than priority
Built for systematic reviews — thousands of abstracts screened by a team, with blinding and conflict resolution built into the workflow.
by Rayyan SystemsThe job is mainly search, research & academics
Built for systematic reviews — thousands of abstracts screened by a team, with blinding and conflict resolution built into the workflow.
It is built for search, research & academics
Free forever, pitched at your first systematic review rather than as a trial
Pricing, simplified
The plans people actually compare, read from each vendor’s own page.
PricingSimple, up-to-date plan overview.
Free version
Petal
Yes — Free plan availableFree, with 1GB of cloud storage, one seat and three guests. Support is included rather than
Rayyan
Yes — Free plan availableFree forever, pitched at your first systematic review rather than as a trial
Individual plans
Petal
Plus
$4.25 / month$2.55 / month (annual)
Advanced
$8.49 / month (annual)
Premium
$29.99 / month$25.49 / month (annual)
Teams Starter
$59.99 / month$50.99 / month (annual)
Teams Pro
$119.99 / month$101.99 / month (annual)
Rayyan
Essential
$8.33 / month (quarterly)$4.99 / month (annual)
Advanced
$13.33 / month (quarterly)$8.33 / month (annual)
Business plans
PetalNot sold to teams
Rayyan
From $41.67 / user / month (annual)Business or Academic
Enterprise
Petal
Custom pricingTeams Enterprise
Rayyan
Custom pricing
Tell us what you use AI for
Pick your main job and the verdict below changes to match. Every answer is on the page already, so this works as a reader, not a lookup.
The verdict for that job
Rayyan
Rayyan. It is built for search, research & academics; Petal does it well without it being its focus; both have a free plan you can start on; Petal is cheaper to start paying for, $4.25 against $8.33.
8 rows compared
Frequently asked questions
Is Petal or Rayyan better?
Rayyan is ahead on 2 of the 8 rows compared, 2 of them about how well it does the job itself, against 1 to Petal. That is a clear lead rather than a tiebreaker. Rayyan is built for search, research & academics; Petal does it well without it being its focus; both have a free plan you can start on; Petal is cheaper to start paying for, $4.25 against $8.33. Petal: A document library with AI built in rather than a chat window you paste into, so your sources stay organised between sessions. Rayyan: Built for systematic reviews — thousands of abstracts screened by a team, with blinding and conflict resolution built into the workflow.
Is Petal or Rayyan cheaper?
Petal — paid plans start at $4.25 a month against $8.33 a month.
Do Petal and Rayyan both have free plans?
Yes. Petal: Free, with 1GB of cloud storage, one seat and three guests. Support is included rather than priority. Rayyan: Free forever, pitched at your first systematic review rather than as a trial.
What should I watch out for?
Petal: You have to commit to keeping documents in it for the value to appear. The individual tiers are separated by storage rather than by features, and the two cheapest are priced for .edu addresses — without one they cost around two thirds more. Rayyan: 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.
Read more
Petal
What it is for, who makes it, what it costs and what to use instead.
Rayyan
What it is for, who makes it, what it costs and what to use instead.
Best AI for Research
Web research, deep research, books, academic papers, citations, news, fact-checking.