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Docs and wikis

Free and open-source GitBook alternatives

GitBook (Docs and knowledge base for technical teams) is a commercial product. These 2 tools do the same job and are free to use or to self-host.
Short answer: the best free alternatives to GitBook are Docusaurus and Outline. GitBook starts at $65/mo per site. Self-hosting is free; you pay only for the server (a small VPS is about $4–6/mo). Licenses and prices checked 2026-10-01.
  1. 1
    Docusaurus

    Open-source static site generator for docs

    Docs sites from Markdown, by Meta.

    Open source (MIT) ·★ 66k GitHub stars · last commit 2026-10-05 · details

  2. 2
    Outline

    Fast team knowledge base and wiki

    Internal knowledge base.

    Source-available (BSL-1.1) ·★ 41k GitHub stars · last commit 2026-10-07 · details

Want paid options too? See all GitBook alternatives or the full free alternatives list. Beyond developer tools, OSS Software lists more open-source GitBook alternatives.

FAQ

Is there a free alternative to GitBook?+

Yes. Docusaurus and Outline do the same job for free; Docusaurus is open source.

What is the best open-source alternative to GitBook?+

Docusaurus is the most starred on GitHub (66k stars). Docs sites from Markdown, by Meta.

Are these GitBook alternatives open source?+

Docusaurus is under OSI-approved licenses. Outline (BSL-1.1) is source-available: free to self-host, with limits in the license.

Open source: OSI-approved license. Free to self-host: the code is public and free to run yourself, with limits in the license.