There are 7 open-source alternatives to Obsidian in this directory. The most popular is AppFlowy with 61.3k GitHub stars, followed by Siyuan(42.5k stars). All are open source, free to use, and many can be self-hosted.
| # | Tool | Stars | Language | License |
|---|---|---|---|---|
| 1 | AppFlowy Bring projects, wikis, and teams together with AI. AppFlowy is the ultimate AI-driven collaborative workspace, offering an open-source alternative to Notion while keeping control of your data. | 61.3k | Dart | GNU Affero General Public License v3.0 |
| 2 | Siyuan A privacy-first, self-hosted, fully open-source personal knowledge management software, written in TypeScript and Golang, ideal for organizing and managing your information securely. | 42.5k | TypeScript | GNU Affero General Public License v3.0 |
| 3 | Logseq Logseq is a privacy-first, open-source platform designed for knowledge management and collaboration, focusing on providing a secure and effective tool for organizing and sharing information. | 42.0k | Clojure | GNU Affero General Public License v3.0 |
| 4 | Trilium Trilium is a versatile platform to build your personal knowledge base, offering structured note-taking and organization features. | 28.6k | JavaScript | GNU Affero General Public License v3.0 |
| 5 | Zettlr Your comprehensive publication tool equipped to manage various writing and publication tasks seamlessly. | 10.8k | TypeScript | GNU General Public License v3.0 |
| 6 | Silverbullet An open source personal productivity platform leveraging Markdown and empowered by Lua scripting, enabling fast, flexible note-taking, task management, and extensibility for knowledge management workflows. | 5.0k | TypeScript | MIT License |
| 7 | Digital Gardeners A curated collection of resources, links, projects, and ideas for individuals cultivating their digital notes and ideas on the public interwebs. | 4.2k | JavaScript | MIT License |
Bring projects, wikis, and teams together with AI. AppFlowy is the ultimate AI-driven collaborative workspace, offering an open-source alternative to Notion while keeping control of your data.
A privacy-first, self-hosted, fully open-source personal knowledge management software, written in TypeScript and Golang, ideal for organizing and managing your information securely.
Logseq is a privacy-first, open-source platform designed for knowledge management and collaboration, focusing on providing a secure and effective tool for organizing and sharing information.
Trilium is a versatile platform to build your personal knowledge base, offering structured note-taking and organization features.
Your comprehensive publication tool equipped to manage various writing and publication tasks seamlessly.
An open source personal productivity platform leveraging Markdown and empowered by Lua scripting, enabling fast, flexible note-taking, task management, and extensibility for knowledge management workflows.
A curated collection of resources, links, projects, and ideas for individuals cultivating their digital notes and ideas on the public interwebs.
The top three are AppFlowy(61.3k stars), Siyuan(42.5k stars), Logseq(42.0k stars). All are open source and free to use.
Yes. Every tool listed here is open source and free to use in your own projects. Many can be self-hosted on your own infrastructure, which means no subscription fees and full control over your data.
Many of the alternatives listed are self-hostable. Each tool's page lists hosting details, system requirements, and licensing terms.
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