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Self-hosted Personal Knowledge Management (PKM) Tools

A curated collection of the best self-hosted tools for organizing personal information and building knowledge graphs..

AppFlowy

AI workspace for docs, projects, and wikis you control

  • Stars

    78,964

  • Last commit

    12 hours ago

  • License

    AGPL-3.0
Open source collaborative workspace combining notes, databases, and AI with full data ownership, offline support, and self-hosting options.

Open Source Alternative to:

Notion

Memos

Self-hosted timeline for quick notes, logs, and snippets

  • Stars

    64,485

  • Last commit

    16 hours ago

  • License

    MIT
Memos is a self-hosted, open-source note-taking app built around a private timeline. Write in Markdown, skip the folder setup, and keep your data on your own server.

Open Source Alternative to:

Notion

Joplin

Encrypted note-taking that syncs across all your devices

  • Stars

    57,196

  • Last commit

    8 hours ago

  • License

    Unknown
Cross-platform note-taking app with end-to-end encryption, Markdown support, web clipping, and sync via Dropbox, OneDrive, or Joplin Cloud.

Open Source Alternative to:

Obsidian

SiYuan

Privacy-first knowledge management with block-level linking

  • Stars

    47,244

  • Last commit

    4 hours ago

  • License

    AGPL-3.0
Personal knowledge management system with WYSIWYG block editing, bidirectional links, spaced repetition flashcards, a relational database, and end-to-end encrypted sync.

Open Source Alternative to:

Notion

Logseq

Privacy-first knowledge base that connects your notes

  • Stars

    45,602

  • Last commit

    7 hours ago

  • License

    AGPL-3.0
Local-first, open-source knowledge management tool with bidirectional linking, outlines, flashcards, PDF annotations, and whiteboards for building a connected second brain.

Open Source Alternative to:

Notion

Khoj

AI
AI second brain for research, automation, and personal agents

  • Stars

    38,134

  • Last commit

    4 months ago

  • License

    AGPL-3.0
Self-hostable AI assistant that connects to your docs and the web, lets you build agents, schedule automations, and run research with verifiable citations.

Open Source Alternative to:

Claude

SurfSense

AI
Privacy-first knowledge base with any AI model you choose

  • Stars

    16,879

  • Last commit

    2 days ago

  • License

    Apache-2.0
Self-hostable NotebookLM alternative that lets teams build searchable knowledge bases from diverse sources, with support for any LLM and no data limits.

Open Source Alternative to:

NotebookLM

Notesnook

Zero-knowledge encrypted notes that sync across all devices

  • Stars

    14,947

  • Last commit

    1 day ago

  • License

    GPL-3.0
End-to-end encrypted note-taking app with zero-knowledge architecture, cross-device sync, web clipper, and a self-hostable sync server.

Open Source Alternative to:

Notion

Blinko

AI-Powered Note Taking App

  • Stars

    11,209

  • Last commit

    11 days ago

  • License

    GPL-3.0
The next generation of open-source AI-powered card notes designed to help you quickly capture and organize inspiration so that ideas never run out.

Open Source Alternative to:

Notion

Silverbullet

Programmable notes with queries, Lua scripting, and wiki links

  • Stars

    Stars growing over the last 30 days6,538

  • Last commit

    5 hours ago

  • License

    MIT
A self-hosted, browser-based note-taking system that turns plain Markdown pages into a queryable, scriptable knowledge base you control.

Open Source Alternative to:

Notion
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