Keycloak vs Logto: which one to choose in 2026?
Both are open source alternatives to Auth0. We compare license, tech stack and features to help you decide which fits your team best.
| Keycloak | Logto | |
|---|---|---|
| Category | Auth & Identity | Auth & Identity |
| License | Apache-2.0 | MPL-2.0 |
| GitHub stars | ~36.5k | ~14.5k |
| Tech stack | Java, Quarkus | Node.js, PostgreSQL |
| Replaces | Auth0, Okta | Auth0, Clerk |
Keycloak has more GitHub stars, which usually indicates a larger community (not necessarily that it's the best option for your use case).
Keycloak
Open source SSO and identity management, an alternative to Auth0/Okta.
Pros
- Permissive Apache-2.0 license, with 36k+ GitHub stars and a verified deployment
Things to consider
- Higher memory usage than lighter alternatives
Logto
Modern, easy-to-use identity, a self-hosted alternative to Clerk/Auth0.
Pros
- The closest experience to a polished SaaS product
Things to consider
- Smaller community than Keycloak or Authentik
Key features
Keycloak
- SSO and LDAP/Active Directory federation
- Social login (Google, GitHub...)
- Granular role and permission management
Logto
- Very polished admin console
- Multi-tenant and organizations included
- Social login and brand customization
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