Caddy vs Keycloak
The ultimate side-by-side head-to-head analysis for 2026.
Short answer
- Price: both start at Free.
- How to start: both are free.
These lines are generated from the pricing we track, not from a paid placement. We do not publish a quality score, because we do not have one we can stand behind. They cannot tell you which tool fits your workflow — the sections below are there for that. How we score tools.
Caddy
Keycloak
Category
Developer Tools
Developer Tools
Base Price
Free
Free
Public API
Yes
Yes
Mobile app
No
No
Open source / self-hostable
Yes
Yes
SSO (SAML)
No
Yes
Choose Caddy if:
Anyone who wants a correctly configured HTTPS server without ceremony.
Choose Keycloak if:
Organisations that need enterprise identity without a per-user bill.
Caddy: pros & cons
- HTTPS configured correctly by default
- Configuration is short and legible
- Single binary, easy to deploy
- Smaller community than nginx
- Fewer third-party guides
- Some advanced setups need plugins
Keycloak: pros & cons
- Full identity server at no licence cost
- Standards support including SAML and OIDC
- Complete control over user data
- Operating it is a real responsibility
- Administration console is dense
- Upgrades need care
Our verdict on Caddy
The easiest path to good TLS defaults. nginx still wins on ecosystem and examples.
Our verdict on Keycloak
The serious open-source answer to Auth0. Budget for the operations, because the licence saving is not free.