Open-source workspaces, wikis, and note tools you can run on your own server — and how to choose between them for data ownership, privacy, and cost control.
Notion is a flexible all-in-one workspace, but it is a closed, cloud-hosted product. If you want to keep your notes, wikis, and databases on your own server — for privacy, data ownership, cost control, or compliance — a growing set of open-source tools can fill that role.
Below are eight self-hosted alternatives that cover the main reasons people reach for Notion: block-based documents, databases and boards, team wikis, and personal knowledge management. None is a pixel-perfect Notion clone, so the right pick depends on whether you want an all-in-one workspace, a polished team wiki, or a privacy-first personal vault. The open-source versions are generally free to self-host; licenses were read from each project's GitHub repository on 2026-09-06 and are noted per tool below.
At a glance
In short
Quick picks:
Closest all-in-one to Notion: AppFlowy — block docs plus grid, board, and calendar databases.
Docs + whiteboard: AFFiNE — pairs a block editor with an infinite edgeless canvas.
Team wiki: Outline (polished, real-time) or Docmost (lighter, fully open source).
Privacy-first, cross-device: Anytype — local-first and end-to-end encrypted.
Power users & personal KB: SiYuan or TriliumNext.
All are free to self-host; most also offer an optional paid managed cloud.
What to look for in a self-hosted Notion alternative
Notion bundles several features that rarely live in one open-source tool. When you evaluate alternatives, weigh these factors:
Block editor: Drag-and-drop blocks for text, headings, tables, embeds, and toggles — the core Notion writing experience.
Databases: Structured views such as grids/tables, kanban boards, and calendars. This is where many lighter wikis fall short.
Hosting model: Most ship a Docker or Docker Compose setup. Check whether you also need a database (PostgreSQL) and object storage (S3-compatible).
Collaboration & sync: Real-time multiplayer editing versus single-user, and how cross-device sync works (server-based or peer-to-peer).
Mobile and offline: Native apps and local-first/offline support vary widely.
License: Fully open source (e.g., AGPL/MIT) versus source-available (e.g., Outline's BSL). As read from each project's GitHub license file on 2026-09-06: AppFlowy, Docmost, SiYuan and TriliumNext are AGPL-3.0; AFFiNE, Outline and Anytype ship custom or source-available license files rather than a standard OSI identifier.
Maintenance burden: Self-hosting means you own backups, TLS, and updates.
Feature matrix
Coverage summary of the table below — counted from the same rows.
| Feature | AppFlowy | AFFiNE |
|---|---|---|
| Block-based documents | ✅ | ✅ |
| Databases (grid, board, calendar) — AFFiNE includes table/kanban database blocks; AppFlowy adds calendar views and richer field types. | ✅ | 🟡 |
| Infinite whiteboard / canvas — AFFiNE's edgeless canvas is its signature feature; AppFlowy has no whiteboard. | ❌ | ✅ |
| Native mobile apps — AppFlowy ships iOS/Android apps (its README links the Play Store listing as of 2026-09-06); AFFiNE's README mentions no mobile app on the same date. | ✅ | 🟡 |
| Self-host via Docker | ✅ | ✅ |
| Real-time collaboration — Both rely on a sync backend (self-hosted or managed cloud); collaboration features are still maturing. | 🟡 | 🟡 |
| Built-in AI — When self-hosting, AI may require your own API key or the managed cloud. | ✅ | ✅ |
| Open-source license — License identifiers above were read from each repository's license file on 2026-09-06. | ✅ | ✅ |
✅ full · 🟡 partial/paid · ❌ not supported
AppFlowy — the closest all-in-one match
Best for: people who want a true Notion replacement with documents and databases in one app.
AppFlowy is an open-source workspace built with Flutter and Rust. It offers block-based documents alongside databases that can be viewed as a grid, board (kanban), or calendar — the combination that makes it feel closest to Notion. It is local-first, with desktop and mobile apps, and AI features that can use your own model or key.
For self-hosting, the project provides AppFlowy Cloud, a self-hostable backend deployed via Docker Compose that adds sync and collaboration. There is also a managed AppFlowy Cloud with free and paid plans if you prefer not to run servers yourself. The code is licensed AGPL-3.0 (GitHub license file, checked 2026-09-06).
AFFiNE — documents plus an infinite canvas
Best for: visual thinkers who want docs and a whiteboard in the same tool.
AFFiNE combines a block-based document editor with an edgeless infinite canvas, so the same content can be edited as a page or arranged spatially on a whiteboard. It also includes database-style blocks (table and kanban). Like AppFlowy it is local-first and can be self-hosted with Docker.
If your Notion use leans on visual planning, diagrams, or mixing freeform canvas with structured notes, AFFiNE's canvas is its standout feature. Mobile support and some collaboration features are still maturing; the project's README listed no mobile app when we checked on 2026-09-06. An AFFiNE Cloud option exists for managed hosting.
Outline — a polished team wiki
Best for: teams that mainly need a fast, searchable knowledge base.
Outline is a markdown-based team knowledge base with real-time collaborative editing, nested document structure, rich search, and integrations such as Slack. It is less of a database tool and more of a documentation/wiki platform, but it is one of the more polished open options for team docs.
You can self-host Outline with Docker; it expects PostgreSQL, Redis, and an S3-compatible store plus an authentication provider. Outline is source-available under the Business Source License (BSL), which permits free self-hosting for most uses — review the license terms for your situation. A paid hosted version is available from the makers.
Docmost — lightweight, fully open-source docs
Best for: teams wanting a simple, open wiki without the heavier setup.
Docmost is an open-source (AGPL) collaborative documentation and wiki app with spaces, permissions, real-time editing, and diagramming support. It positions itself as an open alternative to Notion and Confluence for team documentation.
It self-hosts via Docker with PostgreSQL and Redis. Docmost is newer than Outline, so feature depth and stability are evolving, but it is genuinely free to self-host and developing quickly. A managed cloud is offered as well.
Anytype — local-first and end-to-end encrypted
Best for: privacy-focused users who want cross-device notes without a central server.
Anytype is an object-based, local-first app with end-to-end encryption. Instead of a traditional server, it syncs through the any-sync protocol, and you can run your own self-hosted sync/backup node for full data ownership. Its object model and relations echo Notion's databases, while keeping data on your devices by default.
Anytype is a good fit if your priority is privacy and offline access rather than browser-based team editing. Self-hosting here means operating a sync node rather than a conventional web app; consult the official docs for the current setup.
SiYuan — block-level power-user tool
Best for: power users who want granular blocks, backlinks, and privacy.
SiYuan is a privacy-first, block-based knowledge tool with markdown editing, bidirectional links, and an attribute/database view. It is local-first and can be self-hosted via Docker so you reach your workspace from any browser. Official end-to-end-encrypted cloud sync is available as a paid subscription, while self-hosting the app itself is free and open source (AGPL).
SiYuan has a denser, more technical interface than Notion, which power users tend to appreciate and casual users may find steep.
TriliumNext — personal hierarchical knowledge base
Best for: individuals building a large, deeply nested personal knowledge base.
TriliumNext (the community-maintained continuation of Trilium Notes) is a hierarchical note app designed for big personal knowledge bases. It supports rich text and code notes, scripting/automation, cloning notes into multiple places, and a self-hosted server you can reach from the web client.
It is single-user focused rather than a real-time team workspace, so think of it as a powerful personal vault rather than a Notion replacement for collaboration. It is licensed AGPL-3.0 (TriliumNext/Trilium license file on GitHub, checked 2026-09-06).
Honorable mentions
Depending on your exact need, these are also worth a look:
Joplin: Open-source markdown notes with end-to-end encryption; sync via your own server (e.g., Joplin Server or Nextcloud/WebDAV).
Logseq: Local-first, outliner-style notes with backlinks; popular for networked thought and personal knowledge management.
BookStack: Simple, structured documentation wiki (books/chapters/pages) that is easy to self-host.
Wiki.js: A modern, flexible wiki engine with multiple storage and authentication options.
Nextcloud: If you already run Nextcloud, its Notes and collaborative document apps can cover lighter note-taking needs.
Self-hosting: what to plan for
Running any of these tools yourself trades a subscription fee for operational responsibility. Before you commit, plan for:
Dependencies: Many require PostgreSQL and Redis, and some need S3-compatible object storage for uploads.
Backups: Schedule regular database and file backups and test restoring them — your data ownership is only as good as your last backup.
TLS & access: Put the app behind HTTPS (a reverse proxy such as Nginx or Caddy) and restrict access appropriately.
Updates: Track new releases for security fixes; pin versions and update deliberately.
Remote access: Decide whether you expose the app to the internet or keep it on a VPN/private network.
How to choose the right one
Match the tool to your primary job:
Want the full Notion feel (docs + databases)? Start with AppFlowy.
Need a whiteboard/canvas too? Try AFFiNE.
Building a team knowledge base? Compare Outline (polished) and Docmost (fully open, lighter).
Privacy and offline first? Anytype or SiYuan.
Large personal vault, solo? TriliumNext.
Because these projects evolve quickly, shortlist two, run them in Docker for a week with real content, and weigh the result against the license and maintenance notes above (checked 2026-09-06) before standardizing on one.
Pricing
Prices below were checked against each vendor's official pricing page on 2026-08-12. Vendors change pricing without notice — the linked page is authoritative.
AppFlowyFree to self-host (open source)
Block docs + grid/board/calendar databases
Desktop and mobile apps
Self-host AppFlowy Cloud via Docker Compose
Managed AppFlowy Cloud offers free + paid plans
appflowy.ioAFFiNEFree to self-host (open source)
Block editor + infinite edgeless canvas
Database blocks (table, kanban)
Self-host via Docker
Optional managed AFFiNE Cloud
affine.proOutlineFree to self-host (source-available, BSL)
Markdown team wiki with real-time editing
Powerful search and integrations
Needs PostgreSQL, Redis, S3-compatible storage
Paid managed hosting available
getoutline.comDocmostFree to self-host (open source, AGPL)
Collaborative wiki/docs with spaces & permissions
Real-time editing and diagrams
Self-host via Docker (PostgreSQL + Redis)
Managed cloud option
docmost.comAnytypeFree; optional self-hosted sync node
Local-first, end-to-end encrypted
Object model similar to Notion databases
Sync via any-sync; run your own node
Apps for desktop and mobile
anytype.ioSiYuanFree & open source to self-host
Block-based markdown with backlinks
Database/attribute views
Self-host via Docker, browser access
Optional paid end-to-end-encrypted cloud sync
SiYuan (GitHub)TriliumNextFree & open source to self-host
Hierarchical notes for large personal KBs
Rich text, code notes, scripting
Self-hosted server + web client
Single-user focused
Pros & cons
AppFlowyPros
Closest open-source feel to Notion (docs + databases)
Local-first with desktop and mobile apps
Active development and AI features
Cons
No infinite whiteboard/canvas
Collaboration/sync needs AppFlowy Cloud setup
Some features still maturing
AFFiNEPros
Unique docs + infinite canvas combination
Local-first and self-hostable
Good for visual and spatial planning
Cons
Databases less mature than AppFlowy
Mobile and some collaboration features still developing
Newer, faster-changing project
OutlinePros
Polished, fast team wiki with real-time editing
Strong search and integrations
Mature and widely used
Cons
Not a database/board tool
Heavier setup (PostgreSQL, Redis, S3, auth)
Source-available BSL, not fully open source
DocmostPros
Fully open source (AGPL)
Lightweight, modern team wiki
Spaces, permissions, real-time editing
Cons
Younger project; feature depth still growing
Documentation-focused, limited database features
Smaller community than Outline
AnytypePros
End-to-end encrypted, local-first
No central server required; optional self-host node
Cross-device with Notion-like objects
Cons
Self-hosting means running a sync node, not a typical web app
Less suited to browser-based team editing
Different mental model than Notion
SiYuanPros
Granular block model with backlinks
Privacy-first, self-hostable, browser access
Database/attribute views
Cons
Denser, steeper interface
Official cloud sync is a paid add-on
More technical than casual users may want
TriliumNextPros
Excellent for large, nested personal knowledge bases
Scripting and note cloning for power users
Lightweight self-hosted server
Cons
Single-user, not built for team collaboration
Not a databases/boards tool like Notion
Utilitarian interface
Verdict
There is no single drop-in replacement for Notion, but the gap is closing. For most people who want the all-in-one combination of block documents and databases, AppFlowy is the most natural starting point, with AFFiNE a strong alternative when an infinite canvas matters. Teams focused on documentation are usually better served by Outline or Docmost, while privacy-first individuals will prefer Anytype, SiYuan, or TriliumNext.
All of these are free to self-host, so the smartest move is to try your top two on a test server before migrating. Treat the feature notes here as a starting map; the license and image-size figures in this article carry the date we read them, and a week on a test server tells you what a feature list cannot.
What we measured: image size
The figures below were collected by us on the dates shown, not taken from vendor marketing. Each table says what was read or measured, on which machine, and when.
| Image | Compressed size | Last pushed | Reference |
|---|---|---|---|
| AppFlowy Cloud | 99 MB | 2026-09-03 | docker.io/appflowyinc/appflowy_cloud:latest |
| AFFiNE | 228 MB | — | ghcr.io/toeverything/affine:stable |
| Outline | 299 MB | 2026-09-01 | docker.io/outlinewiki/outline:latest |
| Docmost | 208 MB | 2026-07-04 | docker.io/docmost/docmost:latest |
| SiYuan | 95 MB | 2026-08-30 | docker.io/b3log/siyuan:latest |
| TriliumNext | 108 MB | 2025-06-15 | docker.io/triliumnext/notes:latest |
Compressed size of the linux/amd64 image as reported by the registry (what you download), and the date the tag was last pushed; ghcr.io does not expose a push date. Read from the registry APIs, Windows 11 laptop (AMD Ryzen 5 5625U, 6 cores, 16 GB RAM) — the editor's workstation; measured 2026-09-06.
Sources
Originally published at https://utilverse.info/compare/best-self-hosted-alternatives-to-notion-8-open-source-picks/.
Top comments (1)
The gap between Outline's PostgreSQL/Redis/S3 setup and Anytype's sync-node model matters more to me than the compressed image sizes. I'd spend part of that suggested week with real content testing a restore and an export, especially attachments, internal links, and database relationships. For a small team, data ownership also means being able to recover without the person who set it up and leave without rebuilding the knowledge base by hand.