Best Open Source Knowledge Management Tools in 2026
Tools for capturing, organizing, and retrieving knowledge, notes, and information for individuals and teams.
The most popular pick this year is AFFiNE with 68,262 GitHub stars, but all 4 options below are worth considering depending on your needs.
4 open source knowledge management tools — ranked by GitHub stars. Browse all
AFFiNE
Open-source knowledge base combining note-taking, whiteboard, and project planning in one workspace.
Notion
TriliumNext Notes
Hierarchical personal knowledge base with powerful note-taking, rich text editing, and scripting capabilities.
Notion
Wiki.js
Wiki.js | A modern and powerful wiki app built on Node.js
Notion
Focalboard
Open-source, self-hosted project management tool — a free alternative to Trello, Notion, and Asana.
TrelloHow we rank these tools
Tools are ranked by GitHub stars as a proxy for community adoption and trust. Stars reflect how many developers found a project valuable enough to bookmark — a reasonable signal for quality in the open source world. We only list tools that are actively maintained and open source.
Looking for tools you can run yourself? Browse self-hosted knowledge management tools →