Wiki.js vs Outline
Both are alternatives to Confluence. Here's how they stack up — verified facts, no spin.
Also searched as Outline vs Wiki.js — same comparison, one verdict.
Wiki.js is open source (AGPL-3.0) and Outline is not (Business Source License 1.1 (source-available, not OSI open source)) — so the real question is whether you want to own the wikis & internal docs stack or rent it.
Wiki.js
Every editor, every auth provider, every storage backend.
Wiki.js is the flexible one: Markdown, WYSIWYG, HTML and AsciiDoc editors, more than fifty authentication providers, and content that can sync to Git so your wiki has real version history in a repository you control. AGPL-3.0, around 29k stars. That Git sync is the feature worth noticing — it makes documentation reviewable in pull requests, which is how engineering teams already work. The trade is configuration: it does a great deal, and it asks you to decide about most of it.
Outline
The best-looking option — and not open source, whatever the lists say.
Outline is a fast, beautifully judged team knowledge base with excellent search, a slash-command editor and Slack integration that people actually use. It is also the entry on this page most often mislabelled. Outline ships under the **Business Source License 1.1**, not an OSI licence: you may self-host it for internal use, but you may not offer it as a competing hosted service, and the licence converts to open source only after a delay. For most companies documenting their own work that changes nothing. If you were planning to build a product on it, it changes everything — and you would not learn that from the directory that told you it was open source.
Side by side
6 points of comparison, every one read from a verified field. Green marks the side that wins a row outright. A dash means we do not hold that fact — never that it is zero.
| Wiki.js | Outline | |
|---|---|---|
| Sovereignty ScoreOur transparent 0–100 composite for data ownership and exit cost. | 92 | 66 |
| Open source | Yes | No |
| Self-hostable | Yes | Yes |
| Local-first data | Yes | Yes |
| License | AGPL-3.0 | Business Source License 1.1 (source-available, not OSI open source) |
| Pricing | Free and open source. You supply the server and database. | Self-hostable free within BUSL terms. Outline Cloud is paid per user. |
Wiki.js edges it on the Sovereignty Score, but the right pick depends on the trade-offs below.
Weighing both against staying on Confluence? Is Confluence free? What it actually costs →
Wiki.js
Strengths
- +Git storage backend gives real version control over documentation
- +Over fifty auth providers — SSO into almost anything
- +Multiple editors, so writers are not forced into one style
- +Mature, with years of production use
Trade-offs
- −More configuration than BookStack before it feels finished
- −Node and a database to operate
- −Version 3 has been a long time coming
- −Search is adequate rather than excellent
Outline
Strengths
- +Best design and editing experience of anything on this page
- +Search is genuinely fast and good
- +Slack and API integrations that people use daily
- +Self-hostable for ordinary internal use
Trade-offs
- −NOT open source — Business Source License, despite near-universal mislabelling
- −Cannot be offered as a competing hosted service
- −Licence terms can be tightened by the vendor on future versions
- −Smaller plugin ecosystem than Confluence
Which one fits you
The trade-offs above, turned into a decision. Find the line that describes your team.
Choose Wiki.js
if you want the source and the option to fork it, and git storage backend gives real version control over documentation.
Choose Outline
if best design and editing experience of anything on this page.
Neither, yet
if both carry a real cost you should weigh first — more configuration than BookStack before it feels finished, and nOT open source — Business Source License, despite near-universal mislabelling. If either of those is a dealbreaker for your team, the shortlist is wrong rather than the choice.
Wiki.js vs Outline — common questions
Is Wiki.js a better fit than Outline for wikis & internal docs?
It depends on what you are optimising for, and the honest split is this: Wiki.js scores 92 to Outline's 66 on data ownership and exit cost, so it is the safer choice if you care about being able to leave. Outline earns its place on a different axis — best design and editing experience of anything on this page. Neither is a wrong answer for every team; the table above is the actual comparison.
What happens if we want to switch later?
Wiki.js keeps its data local or in open formats, so leaving is an export rather than a negotiation. Outline is still self-hostable, so the files stay on your server either way — but it is not local-first by design, so check what its export produces before you rely on it.
Can I self-host Wiki.js or Outline?
Both can be self-hosted. The difference is what it costs you in time rather than whether it is possible — see the setup and maintenance rows above.
Are Wiki.js and Outline both alternatives to Confluence?
Yes — both appear in our Confluence comparison, which is why they are worth putting side by side. People usually arrive here already having decided to move off Confluence and now choosing between the two replacements, which is a narrower and much easier question.
Related alternative guides
Facts verified 2026-08-03. Licenses and pricing change — spotted something out of date? That's a correction we want.