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Documentation · head to head

Antora vs Scalar

Antora logo

Antora

Documentation

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

From
Free
Rated
-
Full reviewWebsite
Scalar logo

Scalar

Documentation

Open source API reference renderer and request client generated entirely from an OpenAPI document

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.; Scalar it documents only what an OpenAPI document can express, so guides, authentication walkthroughs and conceptual pages need a second tool and a second navigation.
  • They diverge on capability: Antora covers Multi-repository sourcing, Scalar covers OpenAPI driven reference.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Antora and Scalar actually diverge.

Attributes where Antora and Scalar differ
AttributeAntoraScalar
PlatformsSelf-hosted, Static hosting, CI pipelinesWeb, macOS, Windows, Linux

Identical on both: starting price (Free), pricing model (Open source, no licence fee), 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 Scalar

  • OpenAPI driven reference
  • Embedded API client
  • Generated code samples
  • Framework adapters
  • Themeable renderer
  • Self hostable
  • Spec validation

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 Scalar
  • Maintaining documentation for three or more supported releases without copying directoriesnot Scalar
  • Enterprise documentation teams that already write in AsciiDoc and need version-aware cross-referencesnot Scalar
  • Keeping documentation in the same repository and pull request as the code change it describesnot Scalar

Scalar

  • Replacing default Swagger UI on a public API without moving to a hosted documentation vendornot Antora
  • A framework that already emits an OpenAPI document and needs a reference page mounted on a routenot Antora
  • An internal API portal that must run inside a private network with no external callsnot Antora
  • A team that wants readers to make authenticated test calls without leaving the reference pagenot 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.

Scalar

  • It documents only what an OpenAPI document can express, so guides, authentication walkthroughs and conceptual pages need a second tool and a second navigation.
  • The output is only as good as the spec, so an API with thin descriptions and missing examples produces a thin reference and the tool cannot compensate.
  • Deep visual customisation goes beyond the theme variables quickly, and matching an existing brand often means overriding styles against internal class names that can change.
  • Running the embedded client against a production API invites readers to send real requests, which means rate limits, test accounts and CORS configuration become your problem.
  • The open source renderer and the hosted platform advance at different rates, so a feature seen in a demo is not necessarily in the package you self host.

Pricing, plan by plan

Antora

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

Scalar

Free
  • Open source rendererFree
    • MIT licence, no fee for the renderer
    • Embedded request client
    • Framework adapters

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 Scalar if

  • You need openapi driven reference.
  • You want to start without paying.
  • You work on Web, macOS, Windows, Linux.
  • You also want embedded api client.
Scalar review

Questions people ask

Is Antora or Scalar better?
Neither clearly leads. Antora starts at Free and Scalar at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Antora or Scalar?
Antora starts at Free and Scalar at Free.
Does Antora or Scalar run on more platforms?
Antora runs on Self-hosted, Static hosting, CI pipelines. Scalar runs on Web, macOS, Windows, Linux.
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 Scalar is typically brought in for.
What can Antora do that Scalar cannot?
Antora covers Multi-repository sourcing, Version handling, AsciiDoc, Cross-component references. Scalar covers OpenAPI driven reference, Embedded API client, Generated code samples, Framework adapters.

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.

Scalar: Can I use it without paying anything?

Yes. The renderer is open source and self hostable. The hosted platform is a separate paid product.

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.

Scalar: Does it replace a full documentation site?

No. It covers API reference. Guides and concepts need a general documentation generator alongside it.

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.

Scalar: Will my reference go out of date?

Only if your OpenAPI document does. The reference is generated, so there is no second copy to forget.

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.

Scalar: Does the embedded client send real requests?

Yes, from the reader browser. Plan for CORS, rate limits and a sandbox environment before publishing.

Scalar: What if my API has no OpenAPI document?

Then this is the wrong tool. Producing an accurate spec is the prerequisite, not an optional step.

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