SiYuan

SiYuan is an open-source, privacy-first, self-hosted knowledge workspace where humans and AI agents work together.

Features

Most features are free, even for commercial use.

• Content block
  
  
  
  • Block-level reference and two-way links
  
  
  • Custom attributes
  
  
  • SQL query embed
  
  
  • Protocol siyuan://
  
  
  
  


• Editor
  
  
  
  • Block-style
  
  
  • Markdown WYSIWYG
  
  
  • List outline
  
  
  • Block zoom-in
  
  
  • Block horizontal layout
  
  
  • Million-word large document editing
  
  
  • Mathematical formulas, charts, flowcharts, Gantt charts, timing charts, staffs, etc.
  
  
  • Web clipping
  
  
  • PDF Annotation link
  
  
  
  


• Export
  
  
  
  • Block ref and embed
  
  
  • Standard Markdown with assets
  
  
  • PDF, Word and HTML
  
  
  • Copy to WeChat MP, Zhihu and Yuque
  
  
  
  


• Database
  
  
  
  • Table view
  
  
  
  


• Spaced repetition


• Multi-tab, drag and drop to split screen


• Template snippet


• JavaScript/CSS snippet


• Android/iOS APP


• Docker deployment


• API


• Community marketplace

Some features are only available to paid members, for more details please refer to Pricing.