compare
Authorizer vs Keycloak
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Authorizer | Keycloak |
|---|---|---|
| Language | Go | Java |
| Licence | Apache-2.0 | Apache-2.0 |
| Stars | 2.1k | 37k |
| Latest | 2.4.1 | 26.8.0 |
| Last push | 2026-10-06 | 2026-10-06 |
| Release cadence | too few releases | about 14 days between releases |
| Active contributors | 2 commit authors on the default branch in the last 90 days | 97+ commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Auth0. Alternatives to Auth0 →
PartialAuthorizerLogin, signup and role-based access for your applications over OAuth and OpenID Connect.
Full replacementKeycloakHosted login pages, social login and OpenID Connect for your applications.
Authorizer
- 2.4.12026-09-03Security release. Fixes two reported advisories plus two further issues of the same classes found while fixing them.
- 2.4.02026-08-19Enterprise SSO (SAML IdP, verified domains, home realm discovery), WebAuthn/passkey login, SCIM 2.0, machine and agent…
- 2.4.0-rc.232026-08-17Release candidate for 2.4.0.pre-release
- 2.4.0-rc.222026-08-14Release candidate for 2.4.0.pre-release
- 2.4.0-rc.212026-08-14Release candidate for 2.4.0.pre-release
Authorizer
✓ signed The latest release, 2.4.1, carries a signature GitHub verified.
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Keycloak
unsigned The latest release, 26.8.0, carries no signature GitHub could verify.
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