Docmost vs Outline Wiki: A Comparison for 2026

You need a wiki. Notion's per-user pricing is killing you. Confluence requires an on-premise server you do not want to manage. Your team is scattered across documents, emails, and Slack threads. You cannot find anything.

Two tools dominate the self-hosted wiki space: Docmost and Outline. Both run on your infrastructure. Both cost a fraction of per-seat SaaS. Both are actively maintained. And both differ fundamentally in how they are built, secured, and deployed.

This comparison covers the decisions that matter: licensing, authentication complexity, maturity, permissions, and deployment gotchas. By the end, you will know which fits your team.

Licensing & Code Openness: AGPL vs Business Source License

Docmost is AGPL-3.0; Outline is BUSL-1.1. This is the first fork in the road.

AGPL means Docmost's code is fully open source. You can fork it, modify it, redistribute modified versions, run it in perpetuity. No licensing strings. No corporate approval needed. No restrictions on internal use. If your organization has open-source requirements, requires code audit rights, or mandates open licenses for security or compliance reasons, AGPL is a hard requirement. This is why many teams evaluating Docmost hosting start with the licensing question.

Outline's BUSL (Business Source License) is fundamentally different. You get source code access--transparency is not hidden--and you can run it, but you cannot call it open source. The license is source-available. It grants specific rights: run internally, modify for yourself, but do not redistribute or use it to offer a competing service. The license converts to Apache 2.0 in four years, at which point it becomes fully open source. Some enterprises reject BUSL outright because today, it is proprietary. Others do not care because they are not redistributing software--they just want to run it for internal use.

For internal teams, BUSL is rarely a blocker. You run it, you use it, you are done. For organizations that mandate open source, require community licensing, or need absolute code modification rights for security audits, AGPL is the deciding factor. This is not about feature quality or product maturity. It is about legal compliance and your organization's licensing philosophy.

Authentication & Initial Configuration: The Setup Gotcha Nobody Mentions

Authentication is where most teams trip on day one.

Docmost has built-in email and password login. Create an account, set a password, send invites to team members. They click the link and join. PostgreSQL and Redis are the only external dependencies--both commodity services you probably already use. Total setup from zero to first page written: 3 to 4 hours. One ops person can do this on a weekend. No SSO infrastructure required. No Keycloak installation. No coordinating with your Google Workspace admin. For cost details and deployment options, see the Docmost pricing guide.

Outline requires external SSO--you cannot use plain email and password login. You must integrate with Google Workspace, Slack, GitHub, Keycloak, or another OIDC provider. If you already run Keycloak and have LDAP connected, Outline's authentication is straightforward--30 minutes of config. If you do not have SSO infrastructure, you must stand up Keycloak first (1 to 2 days of installation, LDAP integration, testing). Or you coordinate with your Google Workspace admin to enable OAuth (1 to 3 days of approval cycles if your organization moves slowly).

Outline also requires S3-compatible storage (AWS, Minio, DigitalOcean Spaces). Files go into buckets, not your local disk. If you already use S3 for backups or media hosting, this is no extra burden. If not, it is one more service to manage, one more set of credentials to rotate, one more cost line to track.

For teams moving from Notion or Confluence with no existing SSO infrastructure in place, Docmost is three to five days faster. For teams that already have Keycloak, or where a Workspace admin can enable OAuth in an afternoon, Outline is no burden. This is often the deciding factor for first-month velocity.

Maturity & Feature Depth: The 10-Year Gap

Outline has a 10-year head start. 40,715 GitHub stars to Docmost's 21,792. A 1.87x gap. Last commit: Outline 10 hours ago, Docmost 5 days ago. Both actively maintained.

Outline's maturity shows in every interaction. Slash commands, API-first design, one-click Markdown or PDF exports, Zapier and Slack integrations, full-text search that scales. The editor is polished. Navigation is intuitive. Keyboard shortcuts work. It looks like a product that shipped 10 years ago and fixed every rough edge.

Docmost is 3 years old and moving fast. Plus 1.4 percent star growth in 30 days versus Outline's plus 0.9 percent. It offers real-time collaboration (you see cursors move), block-based editing like Notion, built-in Mermaid and draw.io, granular page-level permissions (Outline lacks these).

Docmost is not catching Outline's polish. But it covers essentials--wiki, search, permissions, comments--without cruft. The question is not 'is Docmost as polished' but 'do you need Outline's polish, or is Docmost sufficient?'

For teams with 20 people or fewer and limited integration needs: Docmost covers you. For 100+ people, heavy API integration, or teams moving from Confluence: Outline's maturity wins.

Permissions, Collaboration & Data Control

Permissions diverge where your team feels the difference every day.

Outline grants access at the document level. You add a person to a document, they can read it. Sub-pages inherit access from their parent document. You cannot lock a single page to one person while another person sees the parent document. This is a gap if you need granular, per-page access control--sensitive HR docs locked to HR only, finance reports locked to finance, product roadmaps locked to product, while the rest of the team browses the public wiki.

Docmost has full role-based access control (RBAC). You create spaces (like folders), pages within those spaces, groups of team members. Then you assign roles per space and per page: owner (full control), editor (create and edit), comment-only (read and comment), or read-only (view only). Each space and page can have different rules. Lock a sensitive page to three people; the rest of the team cannot see it. This is table-stakes for companies managing HR documents, financial data, legal contracts, or internal product roadmaps.

Collaboration style differs too. Outline is markdown-native, designed for asynchronous, text-first editing. You write markdown, it renders, team members comment underneath. It feels like Google Docs but text-based. Docmost is block-based and real-time: you see cursors move when others edit the same block, edits appear instantly without refresh, comments tie to specific blocks. If your team is used to Notion, Docmost's feel is closer.

For small teams (under 10 people) with high trust and simple access needs, Outline's document-level permissions are fine. For teams with sensitive documents scattered across departments, Docmost's granular control is necessary. If real-time editing matters, Docmost wins. If markdown simplicity and asynchronous workflow matter, Outline is your tool.

Deployment & Common Gotchas

Both run as Docker containers. Managed hosting on Elestio costs around 16 dollars per month for a medium instance. That is cheaper than Notion's 10 dollars per user per month if you have three or more people.

Outline has setup gotchas. Authentication must be configured before launch--the app will not work without it. Reverse proxy HTTPS is critical. Outline expects HTTPS; HTTP breaks features. Websocket passthrough must be enabled or real-time editing fails. Miss one, and troubleshooting takes a day.

Docmost is simpler to start but has its own trap: SMTP must be configured early. Skip it, and invites send but team members never receive emails. They will not know to log in. Add five minutes of SMTP config on day one.

Database management is standard for both--PostgreSQL 9.6+ and Redis 4+. Use managed PostgreSQL from your cloud provider if you want. Neither surprises here.

Plan for 1 to 2 days of configuration and testing. Outline requires more upfront coordination because authentication must work on day one. Docmost is more forgiving, but SMTP config on day one saves weeks of 'why did nobody join' complaints.

Which One to Choose? Decision Framework

Use this framework.

Pick Outline if you have SSO infrastructure (Keycloak, Workspace), want maximum polish, value API depth and integrations, or are moving from Confluence. Document-level permissions are enough.

Pick Docmost if you need AGPL open source, want shortest setup, need page-level granular permissions, prefer real-time block-based editing like Notion, or have no existing SSO.

Both beat per-seat SaaS by 10x. Both keep data on your infrastructure. Both are actively maintained. The pick depends on auth infrastructure, permission granularity, and license requirements--not product quality.

If Docmost appeals but infrastructure management does not, consider managed Docmost hosting. Someone else handles servers, backups, updates, patches. You focus on knowledge, not Redis.

Frequently Asked Questions

Is Docmost truly open source?

Yes. Docmost uses AGPL-3.0, the GNU Affero General Public License. You can fork, modify, and run it without restriction. If you contribute changes back and distribute them, you must open-source those changes. For private internal use, you have full freedom.

Does Outline have page-level permissions?

No. Outline grants access at the document level; sub-pages inherit that access. You cannot restrict a single page to one user while keeping the parent document visible to others. Docmost does offer this granularity.

How long does Outline take to set up?

If you already have SSO (Google Workspace, Slack, Keycloak), 3 to 4 hours. If you need to stand up Keycloak first, add 1 to 2 days. S3 storage setup adds another 30 to 60 minutes if you use a new provider.

Can I migrate from Notion to either tool?

Both accept Notion exports. Docmost has direct Notion import in its roadmap (and community contributions exist). Outline has no built-in import; migration is manual. For Confluence, Outline is the easier target since the UX is more similar.

Which tool is faster to search?

Outline's full-text search is faster and more polished. Docmost's search works but is simpler. For teams with thousands of documents, Outline has a meaningful advantage. For small teams (under 500 docs), both are adequate.

The Bottom Line

Outline is the mature, polished choice for teams with SSO and deep integration needs. Docmost is the open-source, fast-setup choice for granular permissions and control.

Both keep knowledge on your infrastructure and cost a fraction of per-seat SaaS.

If Docmost appeals, managed hosting removes the infrastructure burden entirely and lets you focus on knowledge instead of servers.