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.