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Sphinx vs Natural Docs: catalog facts
Sphinx	Natural Docs
Free Free and open source under the BSD 2-Clause licence.	Free Free and open source under the AGPL-3.0 licence.
Windows, macOS, Linux, Command line	Windows
Strong cross-referencing, including across projects Outputs HTML, PDF via LaTeX, ePub and Texinfo	Supports 25 languages in one documentation set Plain-English comment syntax without heavy tags
reStructuredText has a learning curve Requires a Python environment	Newer 2.4 features are still in development releases Comment style differs from Javadoc or Doxygen conventions
Downloadable app	Downloadable app
Open source	Open source
License: BSD-2-Clause	License: AGPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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