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Web Development · head to head

Docusaurus vs Keycloak

Docusaurus logo

Docusaurus

Web Development

Static site generator from Meta for documentation sites

From
Free
Rated
-
Full reviewWebsite
Keycloak logo

Keycloak

Developer Tools

Open-source identity and access management server.

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Docusaurus customisation past the config file assumes React knowledge, which not every docs team has; Keycloak requires self-hosted deployment and operational expertise to install, configure and maintain

Where they differ

Only the attributes on which Docusaurus and Keycloak actually diverge.

Attributes where Docusaurus and Keycloak differ
AttributeDocusaurusKeycloak
Pricing modelOpen source, no licence fee; hosting billed separatelyopen-source
PlatformsWeb, Self-hosted, Node.jsSelf-hosted, Docker, Kubernetes, Linux, Windows, API
CategoryWeb DevelopmentDeveloper Tools

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

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 Docusaurus

  • MDX authoring
  • Docs versioning
  • Internationalisation
  • Algolia search
  • React theming
  • Plugin architecture

Only in Keycloak

Nothing recorded that Docusaurus does not also cover.

What people use each for

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

Docusaurus

  • Open-source project documentation that must track several released versionsnot Keycloak
  • Docs sites needing translation workflows rather than a single languagenot Keycloak
  • Teams already writing React who want to extend the docs theme directlynot Keycloak
  • Replacing a hand-rolled docs site with something that handles search and versioningnot Keycloak

Keycloak

  • Organisations requiring self-hosted identity infrastructure for compliance or data residencynot Docusaurus
  • Companies with existing LDAP/Active Directory systems needing federated authenticationnot Docusaurus
  • Open-source projects and communities requiring free IAM without licensing costsnot Docusaurus
  • Enterprises building custom identity workflows requiring fine-grained authorisationnot Docusaurus
  • Teams with sufficient operational expertise to manage infrastructurenot Docusaurus

Where each one falls short

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

Docusaurus

  • Customisation past the config file assumes React knowledge, which not every docs team has
  • Build times grow noticeably on very large sites, particularly with many versions and locales
  • Major version upgrades have required real migration work rather than a dependency bump
  • It generates a static site, so anything dynamic — gated content, per-user docs — needs a separate solution

Keycloak

  • Requires self-hosted deployment and operational expertise to install, configure and maintain
  • No managed cloud option provided by Red Hat; organisations must operate infrastructure themselves or use third-party distributions
  • Clustering and high-availability configurations require additional operational knowledge
  • Community support only; commercial support requires third-party vendors or distributions

Pricing, plan by plan

Docusaurus

Free
  • DocusaurusFree
    • Full generator
    • Versioning
    • Internationalisation

Keycloak

Free
  • Open-sourceFree
    • Full platform functionality
    • Self-hosted deployment
    • Community support

Which should you pick?

Choose Docusaurus if

  • You need mdx authoring.
  • You want to start without paying.
  • You work on Web, Self-hosted, Node.js.
  • You also want docs versioning.
Docusaurus review

Choose Keycloak if

  • You want to start without paying.
  • You work on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
Keycloak review

Questions people ask

Is Docusaurus or Keycloak better?
Neither clearly leads. Docusaurus starts at Free and Keycloak at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Docusaurus or Keycloak?
Docusaurus starts at Free and Keycloak at Free.
Does Docusaurus or Keycloak run on more platforms?
Docusaurus runs on Web, Self-hosted, Node.js. Keycloak runs on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
Can I use Docusaurus for free?
Both have a free tier, so you can try either at no cost before committing.
What is Docusaurus best used for?
Docusaurus is most often used for open-source project documentation that must track several released versions, docs sites needing translation workflows rather than a single language, teams already writing react who want to extend the docs theme directly, replacing a hand-rolled docs site with something that handles search and versioning. Of those, open-source project documentation that must track several released versions and docs sites needing translation workflows rather than a single language are not what Keycloak is typically brought in for.
What can Docusaurus do that Keycloak cannot?
Docusaurus covers MDX authoring, Docs versioning, Internationalisation, Algolia search.

Answered from the vendors’ own pages

Docusaurus: Is Docusaurus free?

Yes. Docusaurus is open source from Meta with no licence fee. You pay only for hosting, and static output can be served from free tiers on Netlify, Vercel or GitHub Pages.

Keycloak: What protocols does Keycloak support?

Keycloak supports OpenID Connect, OAuth 2.0 and SAML 2.0 protocols for authentication and authorisation.

Source
Docusaurus: What is Docusaurus built with?

React and MDX. Pages are authored in MDX — Markdown that can embed React components — and the theme layer is React, so layouts are extended with components.

Keycloak: Can Keycloak integrate with existing user directories?

Yes. Keycloak supports user federation with LDAP and Active Directory systems, allowing organisations to leverage existing user directories.

Source
Docusaurus: Does Docusaurus support multiple documentation versions?

Yes. Versioning is built in, so documentation for several released product versions can be maintained side by side, which is a main reason projects choose it.

Keycloak: Is Keycloak free?

Yes. Keycloak is fully open-source and free to deploy and use. No licensing fees are required.

Source
Docusaurus: Does Docusaurus include search?

It integrates with Algolia DocSearch rather than shipping its own search index. Open-source projects can typically use Algolia’s free DocSearch programme.

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