Best Open Source Personal Knowledge Management (PKM) Tools using Python in 2026

Joplin

Your secure, open-source note-taking companion

Stars
54,424
Forks
6,065
Last commit
11 hours ago

A free, cross-platform note-taking and to-do application with end-to-end encryption for seamless organization and productivity.

Open Source Alternative to:

Obsidian

SiYuan

Privacy-first knowledge management with block-level referencing

Stars
42,787
Forks
2,697
Last commit
5 hours ago

SiYuan is a personal knowledge management system that prioritizes privacy, supports Markdown, and offers block-level referencing and bidirectional linking.

Open Source Alternative to:

Notion

Khoj

Your AI Second Brain for quick answers and workflow automation

Stars
34,162
Forks
2,155
Last commit
25 days ago

An open-source personal AI application that helps you find answers, understand documents, and create new content with ease.

Open Source Alternative to:

Claude

SurfSense

Transform team knowledge into collaborative AI workspace

Stars
13,864
Forks
1,285
Last commit
1 day ago

AI-powered research assistant that integrates with Notion, GitHub, Slack and more. Chat with documents, generate podcasts, perform hybrid search across your knowledge base.

Open Source Alternative to:

NotebookLM

AnyType

Your personal knowledge sanctuary, infinitely adaptable

Stars
7,421
Forks
464
Last commit
8 hours ago

A versatile, open-source tool for organizing thoughts, notes, and data with customizable objects and relational structures.

Open Source Alternative to:

Notion

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Joplin

Your secure, open-source note-taking companion

Stars
54,424
Forks
6,065
Last commit
11 hours ago

A free, cross-platform note-taking and to-do application with end-to-end encryption for seamless organization and productivity.

Open Source Alternative to:

Obsidian

SiYuan

Privacy-first knowledge management with block-level referencing

Stars
42,787
Forks
2,697
Last commit
5 hours ago

SiYuan is a personal knowledge management system that prioritizes privacy, supports Markdown, and offers block-level referencing and bidirectional linking.

Open Source Alternative to:

Notion

Khoj

Your AI Second Brain for quick answers and workflow automation

Stars
34,162
Forks
2,155
Last commit
25 days ago

An open-source personal AI application that helps you find answers, understand documents, and create new content with ease.

Open Source Alternative to:

Claude

SurfSense

Transform team knowledge into collaborative AI workspace

Stars
13,864
Forks
1,285
Last commit
1 day ago

AI-powered research assistant that integrates with Notion, GitHub, Slack and more. Chat with documents, generate podcasts, perform hybrid search across your knowledge base.

Open Source Alternative to:

NotebookLM

AnyType

Your personal knowledge sanctuary, infinitely adaptable

Stars
7,421
Forks
464
Last commit
8 hours ago

A versatile, open-source tool for organizing thoughts, notes, and data with customizable objects and relational structures.

Open Source Alternative to:

Notion

Open Source Personal Knowledge Management (PKM) Tools using Python

A curated collection of the best open source tools for organizing personal information and building knowledge graphs. using Python.