Note-Taking
Apps for notes, wikis, knowledge bases, and documentation
Open Source Alternatives
Free and open source tools in this category.
AppFlowy
Open source alternative to Notion — AI-powered workspace for wikis, docs, and projects
Outline
Beautiful wiki and knowledge base for teams
Wiki.js
Powerful open source wiki engine with visual editor and Git sync
Docmost
Open source collaborative wiki and documentation software — Notion and Confluence alternative
BookStack
Simple, self-hosted wiki platform organized by books, chapters, and pages
Proprietary Tools
Commercial software in this category. Click to see open source alternatives.
Related Articles
Best Open Source Note-Taking and Wiki Tools in 2026
Outline, BookStack, Wiki.js, and AppFlowy: open source note-taking and wiki tools in 2026 — self-hosted Notion and Obsidian alternatives Free options covered.
Best Open-Source Obsidian Alternatives 2026
Obsidian Sync costs $8/month. These open-source note-taking tools — Logseq, SiYuan, AFFiNE, Joplin, Standard Notes — self-host your knowledge base for free.
Best Open-Source Evernote Alternatives 2026
Evernote now costs $14.99/month and limits free users to 50 notes. These 5 open-source alternatives offer E2E encryption, self-hosting, and full data ownership.
Best Open Source Alternatives to Notion AI in 2026
Notion AI costs $10/user/month on top of the base plan. These open source alternatives give you AI-powered note-taking, writing assistance, and knowledge.
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