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Documentation · head to head

Antora vs Outline

Antora logo

Antora

Documentation

Static site generator that assembles versioned AsciiDoc documentation from many git repositories

From
Free
Rated
-
Full reviewWebsite
Outline logo

Outline

Documentation

Team knowledge base under the Business Source Licence, self-hostable or vendor hosted

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Antora content must be AsciiDoc, so an existing markdown documentation set has to be converted before you can evaluate the tool properly.; Outline the Business Source Licence is not an open source licence, so anyone planning to host Outline for clients, resell it or embed it in a commercial service is prohibited until the per-release change date passes, and this is regularly discovered only at legal review.
  • They diverge on capability: Antora covers Multi-repository sourcing, Outline covers Structured collections.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Antora and Outline actually diverge.

Attributes where Antora and Outline differ
AttributeAntoraOutline
Pricing modelOpen source, no licence feeFree to self-host, per user per month when hosted by the vendor
PlatformsSelf-hosted, Static hosting, CI pipelinesWeb, Self-hosted, Docker, iOS, Android

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Documentation).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Antora

  • Multi-repository sourcing
  • Version handling
  • AsciiDoc
  • Cross-component references
  • Separate UI bundle
  • Content reuse

Only in Outline

  • Structured collections
  • Block editor
  • Search
  • Backlinks and mentions
  • Templates
  • API and webhooks
  • Single sign-on
  • Self-hosting

What people use each for

The jobs each tool is most often brought in to do.

Antora

  • Publishing one documentation site from several product repositories owned by different teamsnot Outline
  • Maintaining documentation for three or more supported releases without copying directoriesnot Outline
  • Enterprise documentation teams that already write in AsciiDoc and need version-aware cross-referencesnot Outline
  • Keeping documentation in the same repository and pull request as the code change it describesnot Outline

Outline

  • Running an internal wiki on your own infrastructure when documentation cannot leave a specific jurisdictionnot Antora
  • Replacing a general-purpose workspace tool with something narrower where search speed and writing flow matter mostnot Antora
  • Keeping engineering decision records and postmortems in templated documents that link to each other automaticallynot Antora
  • Giving a company already standardised on Google or Okta a wiki that inherits identity and group membership directlynot Antora

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Antora

  • Content must be AsciiDoc, so an existing markdown documentation set has to be converted before you can evaluate the tool properly.
  • The component, version and module model must be understood before anything builds, and the first working site typically takes days rather than the afternoon a markdown generator needs.
  • Theming means building a separate UI bundle with Handlebars templates and its own pipeline, which is a front-end project most documentation teams are not staffed for.
  • There is no search included, so every deployment adds either a Lunr extension with its own index size limits or a paid hosted search service.
  • Builds fetch from every configured repository, so large multi-component sites become slow and depend on git availability during every documentation build.

Outline

  • The Business Source Licence is not an open source licence, so anyone planning to host Outline for clients, resell it or embed it in a commercial service is prohibited until the per-release change date passes, and this is regularly discovered only at legal review.
  • There is no local password authentication, so self-hosting requires an identity provider to be in place first, which turns a small internal wiki into a project with a dependency on Google, Okta, Entra or a Keycloak instance somebody has to run.
  • Self-hosting needs Postgres, Redis and S3-compatible object storage together, so the operational footprint is larger than the single database most internal wikis require.
  • The hosted plans offer no customer-selectable hosting region, so buyers with data residency obligations are pushed to self-hosting even when they would have paid to avoid running servers.
  • It is built for internal knowledge rather than public documentation, with no versioned documentation sets, no static output and limited public publishing, so it will not serve as a product documentation site.
  • Because it is a single-vendor project rather than a foundation-governed one, a future licence or pricing change applies to new releases and the only defence is staying on an older version.

Pricing, plan by plan

Antora

Free
  • AntoraFree
    • Mozilla Public Licence 2.0
    • Unlimited components and versions
    • No hosting or seat costs

Outline

Free
  • Self-hostedFree
    • Source available under the Business Source Licence
    • No licence fee for use inside your own organisation
    • Requires Postgres, Redis and S3-compatible storage
  • Team (hosted)$undefined/month
    • Charged per user per month
    • Hosted and maintained by the vendor
    • Single sign-on through Google, Slack or Microsoft
  • Enterprise (hosted)$undefined/month
    • SAML single sign-on and provisioning
    • Administrative controls and audit visibility
    • Negotiated terms and support

Which should you pick?

Choose Antora if

  • You need multi-repository sourcing.
  • You want to start without paying.
  • You work on Self-hosted, Static hosting, CI pipelines.
  • You also want version handling.
Antora review

Choose Outline if

  • You need structured collections.
  • You want to start without paying.
  • You work on Web, Self-hosted, Docker, iOS, Android.
  • You also want block editor.
Outline review

Questions people ask

Is Antora or Outline better?
Neither clearly leads. Antora starts at Free and Outline at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Antora or Outline?
Antora starts at Free and Outline at Free.
Does Antora or Outline run on more platforms?
Antora runs on Self-hosted, Static hosting, CI pipelines. Outline runs on Web, Self-hosted, Docker, iOS, Android.
Can I use Antora for free?
Both have a free tier, so you can try either at no cost before committing.
What is Antora best used for?
Antora is most often used for publishing one documentation site from several product repositories owned by different teams, maintaining documentation for three or more supported releases without copying directories, enterprise documentation teams that already write in asciidoc and need version-aware cross-references, keeping documentation in the same repository and pull request as the code change it describes. Of those, publishing one documentation site from several product repositories owned by different teams and maintaining documentation for three or more supported releases without copying directories are not what Outline is typically brought in for.
What can Antora do that Outline cannot?
Antora covers Multi-repository sourcing, Version handling, AsciiDoc, Cross-component references. Outline covers Structured collections, Block editor, Search, Backlinks and mentions.

Answered from the vendors’ own pages

Antora: Can I use markdown with Antora?

Not as the primary format. Antora is an AsciiDoc pipeline, and treating markdown as a first-class input means a different tool.

Outline: Is Outline open source?

No, not in the OSI sense. It is source available under the Business Source Licence, which permits internal use and self-hosting but not offering it as a service to others, with each release converting to an open source licence after its change date.

Antora: Is it worth it for a single product with one version?

Usually not. The model pays off when you have several repositories or several supported versions; below that a simpler generator will do the same job with far less setup.

Outline: Can I run it for free?

Yes, for your own organisation. Self-hosting carries no licence fee, only the cost of running Postgres, Redis, object storage and an identity provider.

Antora: How does versioning actually work?

Each branch or tag of a source repository becomes a version of that component. You publish a new version by branching, not by copying a directory.

Outline: Can I choose where the hosted version stores data?

No. The hosted plans do not offer a region choice, so residency requirements mean self-hosting.

Antora: Who maintains it?

OpenDevise, the group behind Asciidoctor, under the Mozilla Public Licence. Paid consulting and custom UI work are available from them separately.

Outline: Does it work for public product documentation?

Poorly. It has no versioned documentation sets or static site output, so it is best kept for internal knowledge.

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