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Research · head to head

Mendeley vs REDCap

Mendeley logo

Mendeley

Research

The free all-in-one reference manager

From
Free
Rated
-
Full reviewWebsite
REDCap logo

REDCap

Research

Research data capture licensed free to non-profits, and not licensable at all to companies

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Mendeley has a free tier, so it costs nothing to try first.
  • Each has a real cost: Mendeley free tier limited to 5 Reading Assistant questions per month and 2GB storage; REDCap a for-profit company cannot hold a licence or self-host REDCap, so a biotech or CRO that liked it at university simply cannot deploy it the same way and must buy a commercially licensed hosted version instead.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Mendeley and REDCap actually diverge.

Attributes where Mendeley and REDCap differ
AttributeMendeleyREDCap
Starting priceFreeOn request
Pricing modelfreemiumquote
Free tierYesNo
PlatformsWebWeb, Linux, Windows

Identical on both: user rating (Not yet rated), category (Research).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Mendeley

Nothing recorded that REDCap does not also cover.

Only in REDCap

  • Form and survey designer
  • Longitudinal projects
  • Data quality rules
  • Randomisation
  • Audit trail and e-signature
  • API and exports

What people use each for

The jobs each tool is most often brought in to do.

Mendeley

  • Storing and organizing large research librariesnot REDCap
  • Searching and querying PDFs in librarynot REDCap
  • Uncovering patterns and connections across referencesnot REDCap
  • Comparing experimental data across multiple studiesnot REDCap

REDCap

  • An academic research group at an institution that already runs REDCap, where a new study database costs nothing beyond the time to build itnot Mendeley
  • A hospital collecting patient reported outcomes where data must stay on institutional infrastructure rather than a vendor cloudnot Mendeley
  • An investigator initiated trial that needs randomisation, an audit trail and statistical export without a commercial EDC budgetnot Mendeley
  • A multi site academic collaboration where each site can be given scoped access to a single longitudinal projectnot Mendeley

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Mendeley

  • Free tier limited to 5 Reading Assistant questions per month and 2GB storage
  • Annual billing required to receive one free month equivalent discount
  • Storage limits restricted on Plus (5GB) and Pro (10GB) tiers

REDCap

  • A for-profit company cannot hold a licence or self-host REDCap, so a biotech or CRO that liked it at university simply cannot deploy it the same way and must buy a commercially licensed hosted version instead.
  • Because each institution hosts its own instance, support, uptime, backup and version currency vary by university, and a researcher has no recourse to Vanderbilt when the local instance is two years out of date.
  • It is free of licence fee but not free of cost: the hosting institution carries server, security, patching and support staffing, which is why some institutions charge internal recharges per project.
  • Validation for regulated use is the deploying institution responsibility, so an instance is not Part 11 compliant simply because REDCap supports the features; someone locally has to produce and maintain the evidence.
  • The interface and reporting are dated compared with commercial survey and EDC tools, and complex logic is built through data dictionary spreadsheets rather than a modern visual builder, which slows non technical study teams.

Pricing, plan by plan

Mendeley

Free
  • FreeFree
    • 2GB storage
    • 5 Reading Assistant questions per month
  • Plus$4.99/month
    • Unlimited Reading Assistant
    • 5GB storage
    • $55/year annual billing
  • Pro$9.99/month
    • Unlimited Reading Assistant
    • Compare Experiments
    • Ask My Library
  • Max$14.99/month
    • Unlimited Reading Assistant
    • Compare Experiments
    • Ask My Library

REDCap

On request
  • REDCap non-profit licence$undefined/year
    • No licence fee to non-profit and government institutions that join the consortium
    • Institution must install and host it on its own infrastructure
    • For-profit organisations may not hold a licence or self-host

Which should you pick?

Choose Mendeley if

  • You want to start without paying.
Mendeley review

Choose REDCap if

  • You need form and survey designer.
  • You work on Web, Linux, Windows.
  • You also want longitudinal projects.
REDCap review

Questions people ask

Is Mendeley or REDCap better?
Neither clearly leads. Mendeley starts at Free and REDCap at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Mendeley or REDCap?
Mendeley has a free tier; the other does not. Paid plans start at Free for Mendeley and On request for REDCap.
Does Mendeley or REDCap run on more platforms?
Mendeley runs on Web. REDCap runs on Web, Linux, Windows.
Can I use Mendeley for free?
Yes. Mendeley has a free tier, so you can try it without paying. REDCap starts at On request.
What is Mendeley best used for?
Mendeley is most often used for storing and organizing large research libraries, searching and querying pdfs in library, uncovering patterns and connections across references, comparing experimental data across multiple studies. Of those, storing and organizing large research libraries and searching and querying pdfs in library are not what REDCap is typically brought in for.
What can Mendeley do that REDCap cannot?
REDCap covers Form and survey designer, Longitudinal projects, Data quality rules, Randomisation.

Answered from the vendors’ own pages

Mendeley: How much does Mendeley Premium cost?

Mendeley Plus costs $4.99 per month or $55 per year. Pro tier costs $9.99 per month or $110 per year. Max tier costs $14.99 per month or $165 per year. All annual plans include one free month of service.

Source
REDCap: Is REDCap really free?

The licence is free to non-profit institutions and government organisations that join the consortium, but they must host and support it themselves, so there is real internal cost.

Mendeley: Is there a free version of Mendeley?

Yes, Mendeley offers a free tier with 2GB of storage and 5 Reading Assistant questions per month. No credit card is required for the free plan.

Source
REDCap: Can my company use REDCap?

Not by holding a licence or self-hosting. For-profit organisations must use a separately licensed commercial hosted route.

Mendeley: What storage do different Mendeley plans include?

The free tier includes 2GB storage. Plus tier provides 5GB storage. Pro tier includes 10GB storage. Max tier offers unlimited storage across all your research libraries.

Source
REDCap: Is REDCap 21 CFR Part 11 compliant?

It has the features to support Part 11 use, but compliance depends on how the hosting institution configures, validates and documents its own instance.

REDCap: Who supports it?

Your local institutional REDCap administrator, not Vanderbilt. Support quality varies by site.

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