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.