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Natural Docs vs Doxygen: catalog facts
Natural Docs	Doxygen
Free Free and open source under the AGPL-3.0 licence.	Free Free and open source.
Windows	Windows, macOS, Linux, Command line
Supports 25 languages in one documentation set Plain-English comment syntax without heavy tags	Outputs HTML, PDF, RTF and XML Markdown support in code comments
Newer 2.4 features are still in development releases Comment style differs from Javadoc or Doxygen conventions	PDF output requires a LaTeX setup Configuration has many options to learn
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.