Supabase Auth vs Keycloak

Free with Supabase meets the swiss army knife of iam—if you don't mind sharpening it yourself. Here's our take.

Supabase Auth

Nice Pick

Free with Supabase. Good enough for most apps.

Pros

• Free
• Integrated with Supabase
• Row-level security
• Social logins

Cons

• Less polished UI
• Fewer features
• Tied to Supabase

Keycloak

The Swiss Army knife of IAM—if you don't mind sharpening it yourself.

Pros

• Open-source with robust SSO and OAuth 2.0/OpenID Connect support
• Built-in user federation and social login integrations
• Fine-grained authorization policies for complex access control

Cons

• Steep learning curve for advanced configurations
• Can be resource-heavy and tricky to scale in production

The Verdict

These tools serve different purposes. Supabase Auth is a authentication while Keycloak is a hosting & deployment. We picked Supabase Auth based on overall popularity, but your choice depends on what you're building.

The Bottom Line

Supabase Auth wins

Based on overall popularity. Supabase Auth is more widely used, but Keycloak excels in its own space.