#1
Open-source, privacy-focused collaborative workspace for notes, databases, kanban boards and AI-assisted writing; desktop, mobile and web clients with local-first storage.
76k stars5.9k forksAGPL-3.0last commit Actively maintained
20 self-hosted Outline alternatives
Outline is a cloud-hosted team knowledge base and wiki for creating, organizing, and sharing internal documentation. It offers collaborative rich-text editing, access controls and roles, search, collections/tags, and integrations such as SSO and Slack.
Alternatives to Outline
#2
All-in-one, privacy-focused workspace that merges docs, whiteboards and databases with real-time collaboration and multimodal AI assistance.
71.9k stars5.2k forkslast commit Actively maintained
#3
Memos is a lightweight, privacy-first self-hosted note-taking service with Markdown, fast search, and sharing features for personal notes, wikis, and team knowledge.
62.6k stars4.7k forksMITlast commit Actively maintained
#4
Open-source alternative to Jira/Linear for tasks, cycles, docs and analytics; offers cloud and self-hosted deployments.
58.4k stars5.5k forksAGPL-3.0last commit Actively maintained
#5
A modern, extensible Node.js wiki with Markdown editing, powerful admin tools, multiple auth options, and support for popular SQL databases.
28.8k stars3.3k forksAGPL-3.0last commit Actively maintained
#6
Huly is an open-source all-in-one platform combining project management, team chat, and collaborative documentation as an alternative to tools like Jira, Linear, Slack, and Notion.
27.5k stars2.1k forksEPL-2.0last commit Actively maintained
#7
Open-source Confluence/Notion alternative for team wikis and documentation with real-time editing, spaces, permissions, diagrams, and search.
21.5k stars1.5k forksAGPL-3.0last commit Actively maintained
BookStack is a simple documentation and wiki platform with a WYSIWYG and optional Markdown editor, full-text search, permissions, and integrated authentication.
19k stars2.4k forksMITlast commit Actively maintained
#9
Open-source collaborative documentation and wiki platform with real-time editing, offline sync, export features and flexible self-hosting options.
16.8k stars620 forksMITlast commit Actively maintained
Collaborative note-taking, wiki, and documentation platform with real-time editing, access control, and offline support. Built with Django and React/Next.js.
16.8k stars620 forksMITlast commit Actively maintained
#11
Git-backed wiki engine that supports multiple markup formats, an integrated editor, and features like diagrams, math rendering, citations, and RSS feeds.
14.3k stars1.6k forksMITlast commit Slowing down
#12
TiddlyWiki is a self-contained, highly customizable personal wiki that runs in the browser or on Node.js, enabling notes, knowledge bases, and documentation in one file.
8.6k stars1.3k forkslast commit Actively maintained
#13
Open-source, web-based collaborative Markdown editor for real-time notes, diagrams, and slide presentations with revisions and access controls.
7.4k stars590 forksAGPL-3.0last commit Actively maintained
#14
Self-hosted, browser-based personal knowledge management platform with Markdown pages, wiki-style links, tasks, queries, and Lua scripting for automation.
5.9k stars471 forksMITlast commit Actively maintained
#15
Open-source, local-first Slack and Notion alternative combining team chat, rich docs, databases, and file management with offline-first sync and self-hosting.
5k stars314 forksApache-2.0last commit Actively maintained
#16
DokuWiki is a lightweight, file-based wiki engine with ACL, versioning, and a rich plugin/template ecosystem for documentation and knowledge bases.
4.7k stars919 forksGPL-2.0last commit Actively maintained
#17
Raneto is an open-source, file-based Markdown knowledge base for Node.js with web editing, full-text search, theming, and optional login protection—no database required.
2.9k stars442 forksMITlast commit Actively maintained
Lightweight, privacy-focused self-hosted Markdown notes app with wikilinks, graph view, tags, templates, search, Mermaid diagrams, LaTeX math, and optional password protection.
2.8k stars234 forksMITlast commit Actively maintained
#19
Documize is a self-hosted knowledge base and documentation platform for internal and external docs, offering spaces, labels, search, and enterprise-friendly authentication.
2.4k stars239 forksAGPL-3.0last commit Actively maintained
#20
Self-hostable note-taking and knowledge base app with an extended Markdown editor, fast search, tagging, workspaces, sharing permissions, exports, and offline PWA support.
2.4k stars163 forksMITlast commit Actively maintained
What replacing Outline actually involves
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 19 of 20 shipped a commit in the last six months. Licences in this list: AGPL-3.0, MIT, EPL-2.0, Apache-2.0, GPL-2.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Wikis & Knowledge Bases.
