Mendeley vs Zotero (2026): which should you pick?
As of Nov 12, 2026, Zotero grades higher than Mendeley: 2.8 against 2.2 out of 4.0.
Checked Nov 12, 2026 · graded Nov 12, 2026 by ToolGPA
Zotero grades higher on value for money. They get the same grade on the free plan, features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Mendeley
Reference manager from Elsevier, with paid AI add-ons
Zotero
Free, open-source reference manager from a nonprofit
Which one is for you
Pick Mendeley if
- Fits if you want a no-cost reference library and don't need AI
- Works for researchers already using Scopus or ScienceDirect
Look elsewhere if
- Pricey if you want its AI features, at $26 a month billed yearly
- Not for you if you're buying for a company, since Elsevier says the plans aren't for corporate use
- Watch out: Mendeley Premium is now part of LeapSpace, per the pricing page
- Watch out: AI in the free LeapSpace tier runs unlimited for 14 days, then limited and not inside Mendeley
Pick Zotero if
- Fits if you want a no-cost reference library that works with Word or Google Docs
- Works for a group that wants shared libraries on a nonprofit tool
Look elsewhere if
- Skip it if you want AI summaries or chat, as none is described on its pages
- Tight if you sync lots of PDFs: 300 MB is free, then $20 a year for 2 GB
- Watch out: group libraries draw on the group owner's storage
- Watch out: no web app is listed in the platforms
How we grade them
| 2.2GPAMendeleyFair | 2.8GPAZoteroGood | |
|---|---|---|
| Value for money | DThe AI features are on LeapSpace Individual at $26 a month billed yearly, more than twice the research middle of $10 and inside the dearest tenth, which starts at $20. The free LeapSpace tier excludes the AI inside Mendeley. | AThe app is free and open source, with every feature in the free version. Paid plans only buy storage: $20 a year for 2 GB, $60 for 6 GB and $120 for unlimited. |
| Free plan and trial | BThe reference manager is free with 2 GB of storage, and a person can live on it. The LeapSpace free tier has unlimited AI for only 14 days, then limits. | BThe full app is free, with 300 MB of synced file storage. A few hundred PDFs will go past that, but you can use it unsynced. |
| Features | CA reference library, Ask My Library, a Reading Assistant, Compare Experiments and a Word add-in. The AI bits sit behind the paid plan, and desktop support couldn't be confirmed from the pages read. | CCollects from the web, collections, tags, saved searches, citations in your editor, sync and shared libraries. As an AI research tool it has a gap, since no built-in AI chat or summaries are described. |
| Ease of use | CNo store rating on record. A reference manager means importing a library, setting up folders and a plug-in. | CNo store rating on record. You install the app, a browser connector and a word processor plug-in, and learn collections and tags. |
| Platforms and integrations | BListed as web only, because desktop apps couldn't be confirmed. It has a Word add-in and connects to Scopus and ScienceDirect. | BMac, Windows, Linux, iPhone and Android, with Word, LibreOffice and Google Docs. |
| Best for | managing a reference library for free | collecting and citing sources for free |
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: Mendeley and Zotero. How we grade
Price against what you get
Mendeley starts at $26 a month and scores 2.3 out of 4 on features, ease of use and platforms. Zotero starts at $1.67 a month when paid by the year and scores 2.3.
They score the same, and Zotero starts $24.33 a month lower. Of the other AI research tools on the chart, 21 score higher than Mendeley for less, and 2 score higher than Zotero 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
- Zotero is open source, according to its own site.
- Mendeley also covers chat assistant.
- Zotero also covers web clipper and file sync.
At a glance
| Mendeley | Zotero | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $26 per month, billed annually ($32 billed monthly) | $20 per year for 2 GB of file storage |
| Free plan | Mendeley's reference manager is free, with 2 GB of storage. LeapSpace has a free tier whose AI features are unlimited for 14 days, then limited. | The app is free; syncing files uses 300 MB of free storage. Group libraries draw on the group owner's storage. |
| Free trial | None listed | None listed |
| Web | ||
| macOS | ||
| Windows | ||
| Linux | ||
| iOS | ||
| Android | ||
| Made by | Elsevier | Corporation for Digital Scholarship |
| Price read from | researcher.elsevier.com | zotero.org |
| Checked | Nov 12, 2026 | Nov 12, 2026 |
Worth knowing
Mendeley
- AI features inside Mendeley need a paid LeapSpace plan; the free LeapSpace tier excludes them.
- The pricing page says Mendeley Premium is now part of LeapSpace.
- Platform support for desktop apps could not be confirmed from the pages read, so only web is listed.
- Elsevier says the plans are not for corporate use.
Zotero
- Only 300 MB of file storage is free; larger PDF collections need a paid storage plan.
- The pages read for this entry describe no built-in AI chat or summarizing feature.
- Paid plans buy storage only; every feature of the app is already in the free version.
Key features
Mendeley
- Reference library
- Add PDFs to a library, organize them with collections and tags, then read, highlight and annotate in one place.
- Ask My Library
- On the paid plan, search, summarize and compare PDFs across your saved library; this works in Mendeley Reference Manager.
- Reading Assistant
- Summarize or question a saved document, with suggested follow-up questions.
- Compare Experiments
- Pull goals, methods and results from several studies into a table that exports as CSV.
- LeapSpace search
- Searches Scopus-indexed literature and builds Deep Research reports, with Trust Cards that show supporting sources.
- Word add-in
- The Individual plan lists a Microsoft Word add-in for inserting citations.
Zotero
- Collect from the web
- Zotero senses articles, books and news stories on pages you browse and saves the full reference with one click.
- Collections, tags and saved searches
- Sort items into collections, tag them with keywords, or create saved searches that fill automatically as you add material.
- Citations in your editor
- Inserts references and bibliographies in Word, LibreOffice and Google Docs, with more than 9,000 citation styles.
- Optional sync
- Syncs your library and files across devices, and lets you open your research from any web browser.
- Shared libraries
- Share a library with as many people as you like at no cost, for co-writing or course materials.
- Open source
- The vendor describes Zotero as open source and run by a nonprofit with no financial interest in your data.
Plans
Mendeley
LeapSpace Free$0
Search and other AI features free for 14 days, then with limits; does not include AI features in Mendeley.
LeapSpace Individual$26
per month, billed annually ($32 billed monthly)
Adds AI features in Mendeley and the Word add-in. Bills $320 yearly, $30 a month for 3-month terms.
LeapSpace OrganizationCustom
Institution-wide access, admin console and SSO; price on request.
Zotero
Free$0
The full app, with 300 MB of file storage for syncing PDFs, images and snapshots.
2 GB$20
per year ($1.67 per month)
2 GB of file storage.
6 GB$60
per year ($5 per month)
6 GB of file storage.
Unlimited$120
per year ($10 per month)
Unlimited file storage.
Ways to pay less
Mendeley
- Annual discount
Save $64 with yearly billing
The LeapSpace page shows $320 billed every 12 months against $32 a month billed monthly, labeled as saving $64.
Zotero
No public discounts listed.
Common questions
Which is cheaper, Mendeley or Zotero?
As of Nov 12, 2026, Zotero is cheaper to start with: $1.67 a month when paid by the year, against $26 a month for Mendeley. Mendeley starts at $26 per month, billed annually ($32 billed monthly), and Zotero starts at $20 per year for 2 GB of file storage.
Which has a free plan, Mendeley or Zotero?
As of Nov 12, 2026, both Mendeley and Zotero have a free plan.
Which platforms do Mendeley and Zotero run on?
As of Nov 12, 2026, only Mendeley lists a web app and only Zotero lists macOS, Windows, Linux, iOS and Android apps. A platform missing from a listing is one its maker's pages did not mention.
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.