Keycloak vs Supabase
Detailed comparison to help you choose the right tool for your needs
K
Keycloak
Open-source identity and access management — self-hosted Auth0 alternative
4.2
Editorial RatingQuick Comparison
Rating
4.2
vs4.5
Starting Price
Free
vsFree
Pricing Model
free
vsfreemium
Feature
Keycloak
Supabase
Single Sign-On
SAML & OpenID Connect
Social login
User federation (LDAP/AD)
Admin console
Fine-grained authorization
PostgreSQL database
Authentication
Storage
Edge functions
Realtime
REST & GraphQL APIs
Keycloak Pros
- Enterprise-grade identity management
- Backed by Red Hat
- Supports every auth protocol
- Massive adoption in enterprise
Keycloak Cons
- Java-based — heavier resource usage
- Complex initial configuration
- Documentation can be overwhelming
Supabase Pros
- Open source — no vendor lock-in
- Full PostgreSQL power (not a NoSQL compromise)
- Best free tier in the backend-as-a-service space
- Excellent developer experience and documentation
- Row Level Security for fine-grained access control
Supabase Cons
- Free projects pause after 1 week of inactivity
- Self-hosting is complex to maintain
- Smaller ecosystem than Firebase for mobile