head to head · open source
Keycloak vs casdoor
Keycloak has 37,139 GitHub stars, 9,008 forks, 3,292 open issues and last shipped yesterday. casdoor has 14,511 stars, 1,831 forks, 97 open issues and last shipped yesterday. Keycloak leads on adoption by 156% (37,139 vs 14,511 stars). Keycloak is written in Java under Apache-2.0; casdoor is written in Go under Apache-2.0. Keycloak has attracted 24% as many forks as stars, casdoor 13%. casdoor was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Keycloak | casdoor | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 15K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Java | Go |
| Last push | 2026-10-05 | 2026-10-05 |
| Forks | ⑂ 9.0K | ⑂ 1.8K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Keycloak if
- You weight community size — 37K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Java
- You value the larger contributor base for long-term maintenance
pick casdoor if
- You want the casdoor feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and casdoor fits your workflow better
About Keycloak
Keycloak is an open source identity and access management server, written in Java and licensed under Apache 2.0, that adds authentication and access control to applications and services, and it is intended for teams and organisations that want to own their user store rather than rent one.
read the full Keycloak overview →
About casdoor
Casdoor is an open source, self hosted identity and access management platform written in Go and licensed under Apache 2.0, which provides a single sign on and authentication server with a web console for teams that want to own their user directory rather than delegate it to a hosted provider.
read the full casdoor overview →
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Frequently asked questions
Is Keycloak or casdoor more popular?
Keycloak has 37,139 GitHub stars and casdoor has 14,511. Keycloak has the larger community by that measure.
Are Keycloak and casdoor free?
Both are open source. Keycloak is licensed under Apache-2.0 and casdoor under Apache-2.0. Neither carries a licence fee.
What is the difference between Keycloak and casdoor?
Keycloak is written in Java and casdoor in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Keycloak or casdoor?
Choose Keycloak if you want the larger community (37,139 stars) or its Apache-2.0 licence terms. Choose casdoor if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.