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Research · head to head

Attest vs Mendeley

Attest logo

Attest

Research

Straightforward pricing for predictable research costs

From
On request
Rated
-
Full reviewWebsite
Mendeley logo

Mendeley

Research

The free all-in-one reference manager

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Mendeley has a free tier, so it costs nothing to try first.
  • Each has a real cost: Attest pricing is metered by credits, where one credit equals one survey question answered by one person, rather than a flat per seat rate; Mendeley free tier limited to 5 Reading Assistant questions per month and 2GB storage
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Attest and Mendeley actually diverge.

Attributes where Attest and Mendeley differ
AttributeAttestMendeley
Starting priceOn requestFree
Pricing modelsubscriptionfreemium
Free tierNoYes

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

What people use each for

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

Attest

  • Testing product concepts with global audiencesnot Mendeley
  • Monitoring brand health across campaignsnot Mendeley
  • Validating creative concepts before launchnot Mendeley
  • Researching market trends in 70 languagesnot Mendeley

Mendeley

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

Where each one falls short

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

Attest

  • Pricing is metered by credits, where one credit equals one survey question answered by one person, rather than a flat per seat rate
  • The Basic tier caps usage at 50,000 credits; going beyond it requires upgrading to Standard (100,000), Elite (200,000) or a custom plan above 400,000
  • Additional credits purchased mid year cost 10 percent more per credit than the plan rate

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

Pricing, plan by plan

Attest

On request
  • Basic$undefined/mo
    • Up to 50,000 credits
  • Standard$undefined/mo
    • Up to 100,000 credits
  • Elite$undefined/mo
    • Up to 200,000 credits
  • Custom$undefined/mo
    • Over 400,000+ credits

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

Which should you pick?

Choose Attest if

Nothing in the data separates Attest from Mendeley on the points above - pick on price and on how each one feels to use.

Attest review

Choose Mendeley if

  • You want to start without paying.
Mendeley review

Questions people ask

Is Attest or Mendeley better?
Neither clearly leads. Attest starts at On request and Mendeley at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Attest or Mendeley?
Mendeley has a free tier; the other does not. Paid plans start at On request for Attest and Free for Mendeley.
Does Attest or Mendeley run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Mendeley for free?
Yes. Mendeley has a free tier, so you can try it without paying. Attest starts at On request.
What is Attest best used for?
Attest is most often used for testing product concepts with global audiences, monitoring brand health across campaigns, validating creative concepts before launch, researching market trends in 70 languages. Of those, testing product concepts with global audiences and monitoring brand health across campaigns are not what Mendeley is typically brought in for.

Answered from the vendors’ own pages

Attest: How does Attest's credit system work?

Attest uses a credit-based pricing system where one credit equals one survey answer from one respondent. For example, a 10-question survey completed by 500 people uses 5,000 credits. Only respondents who meet survey criteria consume credits from the qualifying question.

Source
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
Attest: What plans does Attest offer?

Attest offers four subscription plans: Basic (up to 50,000 credits), Standard (up to 100,000 credits), Elite (up to 200,000 credits), and Custom (over 400,000+ credits). All plans include unlimited user seats, designated research expert, customer success team support, and access to 150+ million consumers across 59 countries in 70+ languages.

Source
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
Attest: Can I purchase additional credits on Attest?

Yes. Additional credits are available as add-ons throughout the year. Add-on credits cost 10% more than the per-credit rate in annual plans.

Source
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
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