compare
Keycloak vs Zen IdP
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Keycloak | Zen IdP |
|---|---|---|
| Language | Java | Go |
| Licence | Apache-2.0 | MIT |
| Stars | 37k | 15 |
| Latest | 26.8.0 | v0.1.0 |
| Last push | 2026-10-10 | 2026-08-19 |
| Release cadence | about 14 days between releases | about 1 day between releases |
| Active contributors | 100+ commit authors on the default branch in the last 90 days | 1 commit author on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Zen IdP replaces Keycloak. Alternatives to Keycloak →
PartialOIDC provider configured from YAML files with TOTP login and one SQLite file; no realms, federation or SAML documented.
Both replace Okta. Alternatives to Okta →
Full replacementKeycloakSSO over OpenID Connect and SAML, user federation with LDAP and Active Directory, and MFA.
PartialZen IdPOIDC sign-in with TOTP for users defined in YAML; its README documents no SAML, social login or directory sync.
Keycloak
Zen IdP
- v0.1.02026-08-16
- v0.1.0-alpha.72026-08-16
- v0.1.0-alpha.62026-08-15
- v0.1.0-alpha.52026-08-15
- v0.1.0-alpha.42026-08-15
Keycloak
unsigned The latest release, 26.8.0, carries no signature GitHub could verify.
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Zen IdP
unsigned The latest release, v0.1.0, carries no signature GitHub could verify.
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