Open SourceKnowledge35k

SiYuan

Privacy-first, local-first personal knowledge base with block-level editing.

SiYuan is an open-source, local-first personal knowledge management system with block-level reference and bidirectional links, a built-in WYSIWYG Markdown editor, and an embedded SQL query engine over your notes. It supports end-to-end-encrypted sync, offline use, and a plugin marketplace, and is built with Go and TypeScript. It is a popular self-hostable alternative to Notion and Roam for private knowledge bases.

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Repository

siyuan-note/siyuan

Language

TypeScript

What you'd build with it

Build a private, block-referenced knowledge base queryable via embedded SQL
Self-host an end-to-end-encrypted notes workspace with offline support
Maintain a local-first second brain that AI tools can read from disk

Repository

Language

What you'd build with it

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