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.