OSI-licensed open source
Documentation platforms publish product docs, API references and internal knowledge. Open-source options fall into two families: docs-as-code static site generators that build from Markdown in Git, and wiki-style apps with browser editors.
Eight tools are compared: five static generators and three self-hosted wikis. Licences were verified on the repositories, and we flag Material for MkDocs because its maintainers announced end of life in 2027.
Tools, licences and pricing checked against vendor and repository pages on November 7, 2026.
| Tool | Best for | Pricing | Licence |
|---|---|---|---|
| Docusaurus | React-based product docs | Free, open source | MIT |
| Sphinx | Python and API reference docs | Free, open source | BSD-2-Clause |
| VitePress | Fast Vue-based docs | Free, open source | MIT |
| Starlight | Astro-based docs sites | Free, open source | MIT |
| Material for MkDocs | Existing MkDocs sites | Free, open source | MIT |
| BookStack | Internal wiki with a WYSIWYG editor | Free, open source (self-hosted) | MIT |
| Wiki.js | Team wiki with Git sync | Free, open source (self-hosted) | AGPL-3.0 |
| Docmost | Confluence-style collaborative docs | Free AGPL core (self-hosted); cloud and Enterprise - see vendor pricing | AGPL-3.0 |
Best for: React-based product docs · Free, open source
Docusaurus is a tool for easy-to-maintain open-source documentation websites. Code is MIT, docs content CC-BY-4.0.
Best for: Python and API reference docs · Free, open source
Sphinx is a documentation generator widely used for Python and technical docs.
Best for: Fast Vue-based docs · Free, open source
VitePress is a Vite and Vue powered static site generator.
Best for: Astro-based docs sites · Free, open source
Starlight builds accessible, high-performance documentation websites with Astro.
Best for: Existing MkDocs sites · Free, open source
Material for MkDocs is a documentation framework built on MkDocs. The maintainers state it reaches end of life on May 5, 2027 and point users to a successor, Zensical.
Best for: Internal wiki with a WYSIWYG editor · Free, open source (self-hosted)
BookStack is a platform for storing and organising information and documentation.
Best for: Team wiki with Git sync · Free, open source (self-hosted)
Wiki.js is a modern, lightweight wiki app built on Node.js.
Best for: Confluence-style collaborative docs · Free AGPL core (self-hosted); cloud and Enterprise - see vendor pricing
Docmost is open-source collaborative wiki and documentation software. The core is AGPL-3.0, with Enterprise Edition features under a separate licence.
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| If you need… | Start with |
|---|---|
| Public product docs in React | Docusaurus |
| Python or API reference | Sphinx |
| Vue or Astro projects | VitePress, Starlight |
| Internal wiki | BookStack, Wiki.js |
| Collaborative editing | Docmost |
Quick answers to common questions
Docs written in plain text in Git and built by a static generator.
Choose a generator for versioned public docs and a wiki for internal, non-technical editing.
Outline is not included because its licence is source-available, not OSI.
Its maintainers announced end of life on May 5, 2027, so consider alternatives for new projects.
List it on TechLogHub and we'll review it for this guide.
