Softwr

Documentation · head to head

Doxygen vs ReadMe

Doxygen logo

Doxygen

Documentation

Free, open source documentation generator that builds reference docs from source code comments

From
Free
Rated
-
Full reviewWebsite
ReadMe logo

ReadMe

Documentation

Hosted developer hub priced per API project, with docs personalised from live request logs

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Doxygen there is no vendor or paid support contract; when something breaks in a large or unusual codebase, the only recourse is community mailing lists, forums or reading the source; ReadMe pricing is per project, so an organisation with several distinct APIs multiplies the monthly bill rather than adding seats, and the sensible workaround, merging unrelated APIs into one documentation project, distorts the information architecture to fit the invoice.
  • They diverge on capability: Doxygen covers Code comment parsing, ReadMe covers OpenAPI reference.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Doxygen and ReadMe actually diverge.

Attributes where Doxygen and ReadMe differ
AttributeDoxygenReadMe
Pricing modelOpen source, no licence feePer project per month
PlatformsLinux, macOS, WindowsWeb

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Documentation).

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 Doxygen

  • Code comment parsing
  • Multi-format output
  • Call and inheritance graphs
  • Markdown support
  • CI-friendly build

Only in ReadMe

  • OpenAPI reference
  • Try It playground
  • API metrics
  • Personalised docs
  • Versioning
  • Guides and recipes
  • Git sync via rdme
  • Changelog and support widget

What people use each for

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

Doxygen

  • An engineering team generating API reference documentation directly from source code comments as part of a CI buildnot ReadMe
  • A library or SDK maintainer who wants reference docs that cannot drift out of sync with the code because they are generated from itnot ReadMe
  • An internal platform team documenting a large C++ or Java codebase where structure like class hierarchies and call graphs matters more than prosenot ReadMe
  • A project with no documentation budget that still needs professional-looking reference output without any licence costnot ReadMe

ReadMe

  • Publishing a public API reference where a developer can send a live request with their own key from the documentation pagenot Doxygen
  • Cutting support load by showing an integrating developer their own recent failing requests next to the endpoint descriptionnot Doxygen
  • Keeping documentation versions aligned with API versions so customers on an older release read the matching referencenot Doxygen
  • Shipping documentation from the same pull request as the code change using the rdme command line tool in CInot Doxygen

Where each one falls short

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

Doxygen

  • There is no vendor or paid support contract; when something breaks in a large or unusual codebase, the only recourse is community mailing lists, forums or reading the source
  • Default HTML output looks dated and requires a third-party theme such as Doxygen Awesome to look acceptable to a modern audience, which is extra setup work not included
  • It only generates reference documentation from code comments; it is not a narrative documentation tool, help centre or CCMS, so most teams need a separate tool for guides and tutorials
  • Comment syntax and configuration have a real learning curve, and inconsistent comment discipline across a team produces inconsistent or sparse output regardless of the tool
  • Multi-language support varies in depth; parsing quality for languages outside its C-family core (C++, C, C#, Objective-C) is generally weaker than for its primary targets
  • There is no built-in hosting, search analytics, or reader-facing help centre features, so publishing the generated docs anywhere usable still requires separate infrastructure

ReadMe

  • Pricing is per project, so an organisation with several distinct APIs multiplies the monthly bill rather than adding seats, and the sensible workaround, merging unrelated APIs into one documentation project, distorts the information architecture to fit the invoice.
  • The metrics and personalisation features require your API to stream request logs to ReadMe, which means production request metadata leaves your infrastructure and needs a scrubbing layer plus a security review before anything is switched on.
  • Single sign-on and private documentation sit on the higher tier, so a company that only needs to gate partner documentation behind SAML pays a large step up for one control.
  • The platform is built for describing REST APIs, and long-form product manuals, internal knowledge bases or non-OpenAPI protocols fit it badly, so most customers end up running a second documentation tool alongside it.
  • Theming is bounded by ReadMe templates and limited custom CSS, so a documentation site that must match a strongly designed marketing site will not get there without compromise.
  • Content uses ReadMe-specific Markdown extensions and platform features, so migrating away is an export plus a rewrite rather than moving a folder of Markdown files.

Pricing, plan by plan

Doxygen

Free
  • DoxygenFree
    • Full functionality
    • No usage limits
    • Community mailing list and GitHub issue support

ReadMe

Free
  • FreeFree
    • One project on a ReadMe subdomain
    • OpenAPI reference and guides
    • Basic editing and publishing
  • Startup$99/month
    • One project
    • Custom domain
    • API metrics from request logs
  • Business$399/month
    • One project
    • SAML single sign-on
    • Private and partner-only documentation
  • Enterprise$undefined/year
    • Multiple projects under one contract
    • Negotiated support and uptime terms
    • Security review and custom deployment questions

Which should you pick?

Choose Doxygen if

  • You need code comment parsing.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want multi-format output.
Doxygen review

Choose ReadMe if

  • You need openapi reference.
  • You want to start without paying.
  • You also want try it playground.
ReadMe review

Questions people ask

Is Doxygen or ReadMe better?
Neither clearly leads. Doxygen starts at Free and ReadMe at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Doxygen or ReadMe?
Doxygen starts at Free and ReadMe at Free.
Does Doxygen or ReadMe run on more platforms?
Doxygen runs on Linux, macOS, Windows. ReadMe runs on Web.
Can I use Doxygen for free?
Both have a free tier, so you can try either at no cost before committing.
What is Doxygen best used for?
Doxygen is most often used for an engineering team generating api reference documentation directly from source code comments as part of a ci build, a library or sdk maintainer who wants reference docs that cannot drift out of sync with the code because they are generated from it, an internal platform team documenting a large c++ or java codebase where structure like class hierarchies and call graphs matters more than prose, a project with no documentation budget that still needs professional-looking reference output without any licence cost. Of those, an engineering team generating api reference documentation directly from source code comments as part of a ci build and a library or sdk maintainer who wants reference docs that cannot drift out of sync with the code because they are generated from it are not what ReadMe is typically brought in for.
What can Doxygen do that ReadMe cannot?
Doxygen covers Code comment parsing, Multi-format output, Call and inheritance graphs, Markdown support. ReadMe covers OpenAPI reference, Try It playground, API metrics, Personalised docs.

Answered from the vendors’ own pages

Doxygen: Is Doxygen really free with no paid tier?

Yes, it is GPL-licensed open source software with no company selling licences or support contracts.

ReadMe: Is ReadMe priced per user?

No. It is priced per project, meaning per documented API. Team size does not change the bill, and a second API generally does.

Doxygen: Does Doxygen write documentation for me?

No, it extracts and formats documentation from comments a developer has already written in the source code; it does not generate prose from uncommented code.

ReadMe: Do I have to send my API logs to ReadMe?

Only for metrics and personalised documentation. The reference, guides and playground work without it, but the features that most distinguish the product are the ones that need the log stream.

Doxygen: Can it produce anything besides reference documentation?

It can render standalone markdown pages alongside the generated reference content, but it is not a general authoring or publishing platform.

ReadMe: Can I keep documentation in Git?

Yes. The rdme command line tool synchronises Markdown and OpenAPI files from a repository, so documentation can ship in the same pull request as the code.

ReadMe: Can I self-host it?

No. ReadMe is a hosted product only, so buyers with a hard on-premises requirement need a different platform.

Share

Related pages

More on Doxygen

More on ReadMe

Keep looking

Other head to heads