# SiYuan

> SiYuan is an AGPL-3.0 knowledge base for Windows, macOS, Linux, Android, iOS and HarmonyOS (v3.8.7, Oct 2026), also servable via Docker (browser only, with no export or desktop/mobile connections). Data is stored locally for free; sync is a paid member feature: one-time PRO for your own S3/WebDAV, or a subscription with 8 GB official cloud. Most features are free, including for commercial use. Hardware needs are not documented.

- Repository: https://github.com/siyuan-note/siyuan
- Official docs: https://github.com/siyuan-note/siyuan#readme
- Checked: 2026-10-15

## What it replaces
- Notion: Notes, Databases (tables and boards) (partial). Block-based notes and database table view; sync across devices is a paid member feature.
- Evernote: Notes (partial). Local notes with web clipping; sync needs a paid PRO or subscription.

## Facts, with sources

| Question | Status | Answer | Source | Checked |
|---|---|---|---|---|
| Runs on my machine? | Confirmed | Desktop app with local storage; Docker server option (browser only) | https://github.com/siyuan-note/siyuan#docker-hosting | 2026-10-15 |
| Code licence | Partial | AGPL-3.0 (OSI copyleft) | https://github.com/siyuan-note/siyuan/blob/master/LICENSE | 2026-10-15 |
| Model weights licence | Confirmed | No model weights | https://github.com/siyuan-note/siyuan#readme | 2026-10-15 |
| Commercial use | Confirmed | Yes; AGPL-3.0, and most features free for commercial use | https://github.com/siyuan-note/siyuan#do-i-need-to-pay-for-it | 2026-10-15 |
| Paid services needed? | Partial | Free locally; any sync (S3/WebDAV or official cloud) is paid | https://b3log.org/siyuan/en/pricing.html | 2026-10-15 |
| Hardware | Unknown | Not documented | none found | - |
| Operating systems | Confirmed | Windows, macOS, Linux (x64, arm64); Android, iOS, HarmonyOS | https://github.com/siyuan-note/siyuan/releases/tag/v3.8.7 | 2026-10-15 |
| Setup effort | Confirmed | Easy; app stores, installers, package managers or Docker | https://github.com/siyuan-note/siyuan#-download-setup | 2026-10-15 |

GitHub: 46797 stars, 3069 forks, last push 2026-10-16, archived: no.
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Source: RepoQuarry (https://repoquarry.dev/projects/siyuan). Data licence: CC BY 4.0. Quotes are from project documentation and belong to their authors.