Open-source notes & knowledge bases
Replacing: Notion, Evernote, Obsidian
| Project | What it is | Stars | Last release | Replaces |
|---|---|---|---|---|
| AppFlowy Active AGPL-3.0 | A workspace for docs, wikis and project boards with optional AI features, built so you keep control of your data. | 78.0k | Oct 29, 2026 | Notion |
| AFFiNE Active Mixed or custom | A knowledge base that combines documents, whiteboards and databases in one workspace, with a local-first design. | 74.0k | Oct 27, 2026 | Notion, Miro |
| Memos Active MIT | Memos is an open-source, self-hosted note-taking app that brings your everyday thoughts together in a personal timeline. Your data stays yours, and you choose what to keep private or share. | 64.2k | Oct 27, 2026 | Evernote |
| Joplin Active Mixed or custom | Joplin - the privacy-focused note taking app with sync capabilities for Windows, macOS, Linux, Android and iOS. | 56.9k | Oct 28, 2026 | Evernote, Obsidian |
| SiYuan Active AGPL-3.0 | An open-source, privacy-first, self-hosted knowledge workspace where humans and AI agents work together. | 47.0k | Oct 29, 2026 | Notion, Obsidian |
| Logseq Active AGPL-3.0 | A privacy-first, open-source platform for knowledge management and collaboration. | 45.4k | Oct 25, 2026 | Notion, Evernote, Obsidian |
| Outline Active Mixed or custom | The fastest knowledge base for growing teams. Beautiful, realtime collaborative, feature packed, and markdown compatible. | 41.1k | Oct 23, 2026 | Notion |
| Trilium Notes Active AGPL-3.0 | Build your personal knowledge base with Trilium Notes. | 38.6k | Oct 23, 2026 | Evernote, Obsidian |
| Foam Active Mixed or custom | A personal knowledge base inside VS Code: linked Markdown notes, backlinks and a graph view. | 17.5k | Oct 28, 2026 | Obsidian |
| Zettlr Active GPL-3.0 | A Markdown editor for notes and long-form writing, with citations, linked notes and export to many formats. | 13.8k | Oct 25, 2026 | Obsidian |
| Anytype Active Mixed or custom | Official Anytype client for MacOS, Linux, and Windows. | 9.0k | Oct 3, 2026 | Notion |
| Standard Notes Active AGPL-3.0 | A note-taking app with end-to-end encryption for notes and files across desktop, web and mobile. | 6.7k | Oct 23, 2026 | Evernote |
| SilverBullet Active MIT | A self-hosted, browser-based Markdown knowledge base that you can extend with Lua scripts. | 6.4k | Oct 12, 2026 | Obsidian |