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Developer Tools · head to head

Keycloak vs Skopeo

Keycloak logo

Keycloak

Developer Tools

Open-source identity and access management server.

From
Free
Free plan
Yes
Full reviewWebsite
Skopeo logo

Skopeo

Cloud

Inspect, copy and sign container images without pulling them

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Keycloak requires self-hosted deployment and operational expertise to install, configure and maintain; Skopeo single-purpose: it neither builds nor runs images, so it is one tool in a chain rather than a solution
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Keycloak and Skopeo actually diverge.

Attributes where Keycloak and Skopeo differ
AttributeKeycloakSkopeo
Pricing modelopen-sourceOpen source, no licence fee
PlatformsSelf-hosted, Docker, Kubernetes, Linux, Windows, APILinux, macOS
CategoryDeveloper ToolsCloud

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 Keycloak

Nothing recorded that Skopeo does not also cover.

Only in Skopeo

  • Remote inspection
  • Registry-to-registry copy
  • Format conversion
  • Image signing

What people use each for

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

Keycloak

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

Skopeo

  • Promoting images between staging and production registries without a round tripnot Keycloak
  • Inspecting an image’s contents before deciding to deploy itnot Keycloak
  • Mirroring images into an air-gapped or internal registrynot Keycloak

Where each one falls short

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

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

Skopeo

  • Single-purpose: it neither builds nor runs images, so it is one tool in a chain rather than a solution
  • Command syntax with transport prefixes such as docker:// is unusual and trips people up initially
  • Documentation is sparse compared with the rest of the container ecosystem

Pricing, plan by plan

Keycloak

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

Skopeo

Free
  • SkopeoFree
    • Full functionality
    • No usage limits
    • Community support

Which should you pick?

Choose Keycloak if

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

Choose Skopeo if

  • You need remote inspection.
  • You want to start without paying.
  • You work on Linux, macOS.
  • You also want registry-to-registry copy.
Skopeo review

Questions people ask

Is Keycloak or Skopeo better?
Neither clearly leads. Keycloak starts at Free and Skopeo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Keycloak or Skopeo?
Keycloak starts at Free and Skopeo at Free.
Does Keycloak or Skopeo run on more platforms?
Keycloak runs on Self-hosted, Docker, Kubernetes, Linux, Windows, API. Skopeo runs on Linux, macOS.
Can I use Keycloak for free?
Both have a free tier, so you can try either at no cost before committing.
What is Keycloak best used for?
Keycloak is most often used for organisations requiring self-hosted identity infrastructure for compliance or data residency, companies with existing ldap/active directory systems needing federated authentication, open-source projects and communities requiring free iam without licensing costs, enterprises building custom identity workflows requiring fine-grained authorisation. Of those, organisations requiring self-hosted identity infrastructure for compliance or data residency and companies with existing ldap/active directory systems needing federated authentication are not what Skopeo is typically brought in for.
What can Keycloak do that Skopeo cannot?
Skopeo covers Remote inspection, Registry-to-registry copy, Format conversion, Image signing.

Answered from the vendors’ own pages

Keycloak: What protocols does Keycloak support?

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

Source
Skopeo: Is Skopeo free?

Yes, open source with no licence fee.

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
Skopeo: Why copy images without pulling them?

A registry-to-registry copy avoids downloading and re-uploading gigabytes, which is faster and much cheaper on bandwidth in CI.

Keycloak: Is Keycloak free?

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

Source
Skopeo: Can Skopeo run containers?

No. It only inspects, copies, signs and deletes images. Running them is Podman’s or Docker’s job.

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