Docmost vs Outline: Which Self-Hosted Notion Alternative in 2026?

Your team's knowledge is scattered across Notion pages, a few Google Docs nobody can find, and three Slack threads someone swears had the answer. At some point you decide you want a real wiki, one you host yourself, where the data is yours and the bill does not climb with every new seat. Two self-hosted names rise to the top: Docmost and Outline. They look similar in a screenshot, but they differ in ways that matter once you actually run them. Here is the honest comparison.

The short version: Outline is the older, more polished product with a bigger ecosystem, Docmost is the genuinely open-source, lighter option that is faster to stand up. Which one fits depends on your license stance and how you want people to log in.

The license is the first fork in the road

This is where they really split, and it is worth understanding before you commit.

Docmost is licensed under AGPL-3.0, a recognized open-source license. Its enterprise extras (single sign-on, audit logs, SCIM provisioning) live in a separate paid edition, but the core wiki is genuine open source.

Outline ships under the Business Source License (BSL 1.1). That is source-available, not OSI-approved open source: you can read the code and self-host it for your own team for free, but the license restricts offering it as a competing hosted service, and the code only converts to a fully open license after a set change date. For most teams self-hosting an internal wiki, BSL is perfectly usable. If "actually open source" is a hard requirement for you, that is a point for Docmost.

Logging in: the setup gotcha nobody mentions

This one trips people up on day one. Outline does not ship built-in email-and-password login. To sign in, you wire up an external identity provider, Google, Slack, or a generic OIDC service like Keycloak or Authentik. It also expects PostgreSQL, Redis, and S3-compatible storage for file uploads before it will run.

Docmost keeps it simpler: built-in email-and-password authentication, plus PostgreSQL and Redis. No identity provider required just to get your first page written. For a small team that does not already run SSO, that is a meaningfully shorter path to a working wiki.

The day-to-day feel

Outline has a roughly ten-year head start and it shows. The editor is fast and polished, slash commands are everywhere, real-time collaboration is smooth, search is excellent, and there is a mature API plus a long list of integrations. With around 39,000 GitHub stars, it is the more battle-tested of the two.

Docmost is younger, near 20,000 stars, and lighter, but it covers the essentials well: real-time collaborative editing, spaces with granular permissions, comments, page history, and nice touches like Mermaid, draw.io, and LaTeX support baked in. It feels clean rather than sparse, and it is moving quickly.

Self-hosting on Elestio

Both run as Docker containers, and both are one-click deploys on Elestio if you would rather not assemble the database, cache, and storage by hand. Figure on a MEDIUM managed VM at roughly $16/month, which covers the instance plus automated backups, SSL, and updates. One extra note for Outline: it needs S3-compatible object storage for uploads, so pair it with a store like Garage or SeaweedFS (also on Elestio) or an external bucket. Self-hosting is not free, you are swapping per-seat SaaS pricing for a flat infrastructure cost, but for a team of any real size that math tips in your favor fast.

Common gotchas

• Outline will not start without auth configured: set up at least one identity provider and your S3 credentials before the first launch, or you will stare at a login screen you cannot get past.
• Outline behind a reverse proxy: set the public URL and force HTTPS, otherwise OAuth redirects break.
• Docmost needs SMTP: configure mail early, or invites and password resets silently go nowhere.
• Both rely on websockets for real-time editing, so make sure your reverse proxy is set to pass them through.

So which one?

Pick Outline if you want the most polished, mature experience, you already run SSO, and you lean on a deep integration and API ecosystem. The BSL license is fine for internal use, and the extra setup buys you a genuinely refined product.

Pick Docmost if a real open-source license matters to you, you want built-in email-and-password login without standing up an identity provider, or you just want a clean, capable wiki running in minutes on a lighter footprint.

Both keep your team's knowledge on infrastructure you control, and both will get you off the per-seat SaaS treadmill. You can have either one running on Elestio in a couple of minutes: Docmost or Outline.

Thanks for reading ❤️ See you in the next one 👋