XWiki vs Outline
Both are alternatives to Confluence. Here's how they stack up — verified facts, no spin.
Also searched as Outline vs XWiki — same comparison, one verdict.
XWiki is open source (LGPL-2.1) 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.
XWiki
The heavyweight — a wiki you can program like an application platform.
XWiki has been running enterprise documentation for two decades and is less a wiki than a platform you write applications on top of: structured data, scripting, forms and workflow all live inside the wiki itself. LGPL-2.1, Java, with a large extension marketplace. It is the only option here that genuinely replaces Confluence Data Center feature for feature, including the parts organisations use for regulated processes. It is also the heaviest, and it looks its age next to Docmost.
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.
| XWiki | Outline | |
|---|---|---|
| Sovereignty ScoreOur transparent 0–100 composite for data ownership and exit cost. | 91 | 66 |
| Open source | Yes | No |
| Self-hostable | Yes | Yes |
| Local-first data | Yes | Yes |
| License | LGPL-2.1 | Business Source License 1.1 (source-available, not OSI open source) |
| Pricing | Free and open source. Commercial support available from XWiki SAS. | Self-hostable free within BUSL terms. Outline Cloud is paid per user. |
XWiki 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 →
XWiki
Strengths
- +The only true Confluence Data Center replacement, feature for feature
- +Structured data and scripting — build applications inside the wiki
- +Two decades of enterprise deployment behind it
- +LGPL with commercial support available
Trade-offs
- −Heaviest option here — a Java application to operate
- −Interface is dated next to the newer tools
- −Steep learning curve for the platform features
- −Overkill if you just want to write pages
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 XWiki
if you want the source and the option to fork it, and the only true Confluence Data Center replacement, feature for feature.
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 — heaviest option here — a Java application to operate, 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.
XWiki vs Outline — common questions
Is XWiki a better fit than Outline for wikis & internal docs?
It depends on what you are optimising for, and the honest split is this: XWiki scores 91 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?
XWiki 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 XWiki 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 XWiki 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.