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Top Open Source Internal Knowledge Bases Tools in 2026

A curated collection of the 3 best free and open-source Internal Knowledge Bases tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.

  • XWiki

    Open source enterprise wiki and knowledge base

    Stars
    1,302
    Last commit
    10d ago
    License
    LGPL-2.1

  • Outline

    Modern team knowledge base & wiki

    Stars
    40,349
    Last commit
    13d ago
    License
    Open Source

  • Docmost

    Enterprise-ready on-premise wiki for teams

    Stars
    21,482
    Last commit
    10d ago
    License
    AGPL-3.0
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Showing 3 of 3 open-source tools