XWiki
100 · HealthyEnterprise wiki with structured pages, fine-grained rights and an extension system for building apps on top.
Enterprise wiki with structured pages, fine-grained rights and an extension system for building apps on top.
Note-taking app with notebooks, tags, web clipping and end-to-end encrypted sync across devices.
Real-time collaborative document editor from La Suite, the workplace tools built by the French and German governments.
Lightweight timeline for quick notes and memos, searchable by tag and date.
AI search and chat over your company's documents, with connectors for Slack, Google Drive, Confluence and more.
Interactive API reference docs and an API client, generated from OpenAPI documents.
Collaborative workspace for docs, databases, kanban boards and wikis, with built-in AI.
Outliner for notes and knowledge management, with daily journals, backlinks and a graph view.
End-to-end encrypted note-taking app with notebooks, tags, reminders and web clipping.
Workspace that puts docs, whiteboards and databases on one canvas, usable offline or self-hosted.
Wiki organized as shelves, books, chapters and pages, built on Laravel.
React and Next.js framework for documentation sites, with search, MDX content and API reference pages.
End-to-end encrypted notes and files, with editors for Markdown, code, tasks and spreadsheets.
Block-based personal knowledge base with Markdown, backlinks, databases and end-to-end encrypted sync.
Node.js wiki with Markdown and visual editors, Git sync and many auth providers.
Collaborative wiki with real-time editing, spaces, permissions, comments and diagrams.
Local-first workspace that combines team chat, pages and databases, with a self-hosted sync server.
The code for these is public, but the license is not an OSI open source license, or we have not verified it yet. Check the license notes on each project before relying on it.
Block-based personal knowledge base with Markdown, backlinks, databases and end-to-end encrypted sync.
Will it still be around?
Stable
Score 70/100
Can a business use it freely?
Free, share hosted changes
AGPL-3.0 · open source (copyleft)

has,doesn't3 features1 feature
8/11 Notion features free in SiYuan
Headline Notion features on the Plus plan, and whether SiYuan has each in its free, self-hosted edition.
| Feature | NotionPlus plan | SiYuan8 of 11 free |
|---|---|---|
| Notion has, SiYuan doesn't3 | ||
| Real-time co-editing | Included | NoSingle-user with sync |
| Page-level permissions | Included | No |
| SAML single sign-on | Higher planBusiness plan | No |
| SiYuan has, Notion doesn't1 | ||
| AI writing and Q&A | Higher planBusiness plan | YesWith your own model key |
| Both have7 | ||
| Rich docs and nested pages | Included | YesBlock-based |
| Databases with table and board views | Included | YesTable, gallery and kanban views |
| Templates | Included | Yes |
| Page history | Included30 days | YesFile history |
| API and integrations | Included | Yes |
| Offline mode | Included | YesLocal-first |
| Mobile apps | Included | Yes |
Sources
A 25-member team on Notion Plus pays about $250 a month. SiYuan on OpenTools costs $15 a month, setup included, so you save $235 a month, about $8,460 over three years.
Monthly cost
You save each month
$235/mo
94% less than today
Saving from month one
You save
List price checked 7 Oct 2026 · Source · Disclaimer
Stable · activity, bus factor and issue responsiveness, from GitHub
Score v2 · How it works
100/100
1/100
100/100
Free, share hosted changes
AGPL-3.0 · Open source (copyleft)
What you need to do
Free for any use, commercial included. If you change the code and people outside your company use it over the network, you must publish your changes under the same license.
GNU Affero General Public License v3.0 · Open source (copyleft). OSI-approved license that requires sharing changes under the same license when you distribute (AGPL: also when you offer it over a network).
Detected by GitHub as AGPL-3.0.
Snapshot from 2026-10-09 · Funding: custom
Points for pull requests merged into SiYuan and reviews of them since 11 June 2026 (older history is still loading). Building something another user asked for earns more. 20 people have points on SiYuan in all.