Mendeley vs Paperguide (2026): which should you pick?
As of Nov 12, 2026, Paperguide grades higher than Mendeley: 2.6 against 2.2 out of 4.0.
Checked Oct 5, 2026 and Nov 12, 2026 · graded Oct 10, 2026 and Nov 12, 2026 by ToolGPA
Mendeley grades higher on the free plan. Paperguide grades higher on value for money and features. They get the same grade on 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
Paperguide
AI research platform for literature and systematic reviews
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 Paperguide if
- Fits if your team runs systematic reviews and needs every screening decision documented
- Works for students and academics, who get 30% off with a university email
Look elsewhere if
- Tight if you're staying free, with 20 AI searches and 2,000 credits a month, and no systematic reviews or shared workspaces
- Pricey if you need dual-reviewer screening, which sits on Evidence at $89 a seat a month billed annually
- Watch out: every AI feature draws on one monthly credit pool, 12,500 on Plus and 50,000 on Pro
- Skip it if you were counting on image and table extraction, as that's still marked coming soon
- Not for you if you want a phone or desktop app, as only a web app and browser extension are listed
How we grade them
| 2.2GPAMendeleyFair | 2.6GPAPaperguideGood | |
|---|---|---|
| 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. | CPlus is $12 a seat a month billed annually, or $19 monthly, which is the middle of this category exactly. It does carry systematic reviews of up to 1,000 papers, unlimited AI searches and 12,500 credits a month, and a university email takes 30% off. Dual-reviewer screening is another matter: Evidence, at $89. |
| 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. | CFree gives you 2,000 AI credits and 20 AI searches a month, 500 MB of reference storage and extraction tables of up to 10 papers and 5 columns. Enough to learn the tool, not to run a project on: there are no systematic reviews and no shared workspaces. |
| 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. | ATwo parts rivals like Elicit and Consensus don't list: screening that ends in a PRISMA diagram with dual-reviewer checking, and a full reference manager with 1,000-plus citation styles. Then AI search across 200 million papers, extraction tables, an agent and a writer. |
| 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, and the work is front-loaded: a protocol to define for screening, columns to set up for extraction, and one monthly credit pool that every AI feature draws on. It does import a Zotero or Mendeley library, so your references don't start from nothing. |
| 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. | BA web app with a browser extension, plus a Search API at 10 requests a month on Free and 500 on Pro. It imports from Zotero and Mendeley and connects to Claude and ChatGPT. No phone or desktop app is listed, so that API is what earns the B. |
| Best for | managing a reference library for free | search, references and reviews in one workspace |
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 Paperguide. 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. Paperguide starts at $12 a month for each person and scores 3.0.
Paperguide scores higher and starts $14 a month lower. Of the other AI research tools on the chart, 21 score higher than Mendeley for less, and none scores higher than Paperguide 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
- Mendeley also covers highlights.
- Paperguide also covers AI search, AI agents and long-form writing.
At a glance
| Mendeley | Paperguide | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $26 per month, billed annually ($32 billed monthly) | $12 per seat / month, billed annually ($8 with the academic discount) |
| 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. | 2,000 AI credits and 20 AI searches a month, 500 MB of reference storage, extraction tables of up to 10 papers and 5 columns, and 10 Search API requests a month. |
| Free trial | None listed | None listed |
| Web | ||
| Browser extension | ||
| Made by | Elsevier | Paperguide |
| Price read from | researcher.elsevier.com | paperguide.ai |
| Checked | Nov 12, 2026 | Oct 5, 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.
Paperguide
- The Free plan has no systematic reviews or shared workspaces and is limited to 20 AI searches and 2,000 AI credits a month.
- AI features draw on a monthly credit pool: 12,500 on Plus, 50,000 on Pro and 150,000 on Evidence.
- Dual-reviewer screening for systematic reviews needs the Evidence plan, at $89 per seat / month billed annually.
- Image and table extraction is marked as coming soon on the pricing page.
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.
Paperguide
- AI Search
- Ask a research question in plain language and get a synthesized answer drawn from more than 200 million papers, with each claim linked to its source.
- Systematic reviews
- Screens papers against a predefined protocol with cited evidence for each criterion, then produces verified extraction tables, a report and a PRISMA diagram. Dual-reviewer screening is on the Evidence plan.
- Reference manager
- Imports from Zotero or Mendeley, or by DOI, URL, PDF, BibTeX or RIS, fetches metadata and open-access PDFs, and formats citations in more than 1,000 styles.
- Extract Data
- You define the columns and the AI fills them across the selected papers, with every value linked to the statement it came from. Tables export to CSV or Excel.
- Research Agent
- Investigates a topic across the paper database and your library, answers questions about one or several PDFs, and can generate a literature review of up to 50 papers.
- AI Writer
- Drafts and edits documents with citations from your library and the paper database, and exports them as Word, PDF or LaTeX files.
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.
Paperguide
Free$0
2,000 AI credits and 20 AI searches a month, 500 MB of reference storage, and extraction tables of up to 10 papers and 5 columns.
Plus$12
per seat / month, billed annually ($144); $19 billed monthly
12,500 AI credits a month, systematic reviews of up to 1,000 papers, unlimited AI searches and reference storage, and shared workspaces.
Pro$29
per seat / month, billed annually ($348); $49 billed monthly
50,000 AI credits a month, systematic reviews of up to 5,000 papers and 500 Search API requests a month.
Evidence$89
per seat / month, billed annually ($1,068); $149 billed monthly
150,000 AI credits a month, PRISMA-grade dual-reviewer screening, a dedicated support channel and 1,500 Search API requests a month.
EnterpriseCustom
Custom AI credits, systematic reviews of up to 20,000 papers, dual-reviewer screening and a dedicated support channel.
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.
Paperguide
- Annual discount
Save up to 41% with yearly billing
Billed yearly, Plus is $12 a seat per month against $19 billed monthly, Pro is $29 against $49 and Evidence is $89 against $149. The pricing page labels the saving as 41%.
- Education
30% academic discount with a university email
Verifying a university email takes 30% off: Plus becomes $8, Pro $20 and Evidence $62 per seat / month billed yearly, or $13, $34 and $104 billed monthly.
Common questions
Which is cheaper, Mendeley or Paperguide?
As of Nov 12, 2026, Mendeley starts at $26 per month, billed annually ($32 billed monthly), and Paperguide starts at $12 per seat / month, billed annually ($8 with the academic discount). One is priced for each person and the other is not, so which costs less depends on how many of you use it.
Which has a free plan, Mendeley or Paperguide?
As of Nov 12, 2026, both Mendeley and Paperguide have a free plan.
Which platforms do Mendeley and Paperguide run on?
As of Nov 12, 2026, only Paperguide lists a browser extension. Both list a web app. 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.