Keycloak vs Supabase
The ultimate side-by-side head-to-head analysis for 2026.
Short answer
- Price: not directly comparable — Keycloak is free, Supabase is free tier available.
- How to start: Keycloak is free, Supabase is free tier available.
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 We do not publish a quality score, because we do not have one we can stand behind.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.
Keycloak
Supabase
Category
Developer Tools
Developer Tools
Base Price
Free
Free tier
Public API
Yes
Yes
Mobile app
No
No
Open source / self-hostable
Yes
Yes
SSO (SAML)
Yes
Yes
Choose Keycloak if:
Organisations that need enterprise identity without a per-user bill.
Choose Supabase if:
Next.js Developers, Frontend-focused Coders, and Startups.
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
Supabase: pros & cons
- PostgreSQL Power: Professional relational data management without NoSQL limits.
- Ease of Use: Its dashboard is exceptionally modern and easy to understand.
- Integrated Auth: Set up Google, GitHub, and Apple logins in a matter of minutes.
- Vector Support: Comes with pgvector integration ready for AI-based projects.
- New Platform: Some features (like Edge Functions) are still in a beta phase.
- Ecosystem: Does not yet have as massive an 'Extensions' market as Firebase.
- Self-Hosting: Setting it up on your own server is not as easy as the cloud version.
Our verdict on Keycloak
The serious open-source answer to Auth0. Budget for the operations, because the licence saving is not free.
Our verdict on Supabase
The fastest, most reliable, and most 'free' (open-source) choice for a modern backend.