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Research · head to head

Chemaxon vs Mendeley

Chemaxon logo

Chemaxon

Research

Cheminformatics toolkits and structure handling, now a Certara subsidiary

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: Chemaxon the October 2024 Certara acquisition ended two decades of vendor neutrality, and organisations that embedded JChem precisely because Chemaxon competed with nobody now depend on a component owned by a company that sells into their accounts.; Mendeley free tier limited to 5 Reading Assistant questions per month and 2GB storage
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Chemaxon and Mendeley actually diverge.

Attributes where Chemaxon and Mendeley differ
AttributeChemaxonMendeley
Starting priceOn requestFree
Pricing modelquotefreemium
Free tierNoYes
PlatformsWeb, Windows, macOS, Linux, On-premise, APIWeb

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 Chemaxon

  • Marvin
  • JChem toolkits
  • Calculator Plugins
  • Compound Registration
  • Instant JChem
  • Design Hub
  • Free academic package
  • Embedded redistribution

Only in Mendeley

Nothing recorded that Chemaxon does not also cover.

What people use each for

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

Chemaxon

  • A software vendor embedding a structure sketcher and search into its own product rather than writing chemistry codenot Mendeley
  • A pharmaceutical informatics team building an internal compound registration system on JChem cartridgesnot Mendeley
  • A computational chemistry group needing consistent pKa and logD prediction across a screening cascadenot Mendeley
  • A university teaching cheminformatics that can use the free two-year academic package for a classnot Mendeley

Mendeley

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

Where each one falls short

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

Chemaxon

  • The October 2024 Certara acquisition ended two decades of vendor neutrality, and organisations that embedded JChem precisely because Chemaxon competed with nobody now depend on a component owned by a company that sells into their accounts.
  • Licensing is genuinely complicated, with different terms for named users, servers, desktop applications and embedded redistribution, so working out what you are allowed to deploy usually requires a conversation rather than reading a document.
  • The free academic package is granted for two-year terms and covers education rather than research, so a research group that assumed it was free discovers it needs a paid commercial academic licence.
  • Nothing is priced publicly for commercial use, so a team evaluating Chemaxon against open source alternatives such as RDKit cannot compare total cost without entering a sales process.
  • Open source cheminformatics has closed much of the functional gap for basic structure handling and search, so the commercial case increasingly rests on prediction quality, support and registration workflows rather than on capability that cannot be obtained elsewhere.

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

Chemaxon

On request
  • Academic package$undefined/year
    • Free of charge for education for a two-year term
    • Covers a class including tutor and students, or an applicant faculty
    • Non-commercial research use only
  • Commercial licence$undefined/year
    • Quoted per named user, per server or per redistributed application
    • Toolkits, desktop applications and embedded redistribution licensed separately
    • Annual support and maintenance included in the subscription

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 Chemaxon if

  • You need marvin.
  • You work on Web, Windows, macOS, Linux, On-premise, API.
  • You also want jchem toolkits.
Chemaxon review

Choose Mendeley if

  • You want to start without paying.
Mendeley review

Questions people ask

Is Chemaxon or Mendeley better?
Neither clearly leads. Chemaxon 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, Chemaxon or Mendeley?
Mendeley has a free tier; the other does not. Paid plans start at On request for Chemaxon and Free for Mendeley.
Does Chemaxon or Mendeley run on more platforms?
Chemaxon runs on Web, Windows, macOS, Linux, On-premise, API. Mendeley runs on Web.
Can I use Mendeley for free?
Yes. Mendeley has a free tier, so you can try it without paying. Chemaxon starts at On request.
What is Chemaxon best used for?
Chemaxon is most often used for a software vendor embedding a structure sketcher and search into its own product rather than writing chemistry code, a pharmaceutical informatics team building an internal compound registration system on jchem cartridges, a computational chemistry group needing consistent pka and logd prediction across a screening cascade, a university teaching cheminformatics that can use the free two-year academic package for a class. Of those, a software vendor embedding a structure sketcher and search into its own product rather than writing chemistry code and a pharmaceutical informatics team building an internal compound registration system on jchem cartridges are not what Mendeley is typically brought in for.
What can Chemaxon do that Mendeley cannot?
Chemaxon covers Marvin, JChem toolkits, Calculator Plugins, Compound Registration.

Answered from the vendors’ own pages

Chemaxon: Is Chemaxon still independent?

No. It has been a subsidiary of Certara since October 2024. The products continue under the Chemaxon name.

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
Chemaxon: Is the academic licence really free?

The education package is free for two-year terms covering a class or faculty. Non-commercial research groups pay a discounted commercial academic licence.

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
Chemaxon: Can I ship Chemaxon inside my own software?

Yes, but embedded redistribution is licensed separately from internal use and must be negotiated.

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
Chemaxon: How does it compare with RDKit?

RDKit is free and covers basic structure handling well. Chemaxon differentiates on property prediction, registration workflows, the sketcher and commercial support.

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