Keycloak vs PostgreSQL
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 We do not publish a quality score, because we do not have one we can stand behind.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.
Keycloak
PostgreSQL
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)
Yes
No
Choose Keycloak if:
Organisations that need enterprise identity without a per-user bill.
Choose PostgreSQL if:
Backend Developers, Data Engineers, and System Architects.
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
PostgreSQL: pros & cons
- Rock-Solid Reliability: Known for data integrity and full ACID compliance.
- Extensible Architecture: Add new data types and functions via a massive plugin ecosystem.
- JSONB Support: Combines the power of relational data with NoSQL-like flexibility.
- Open Source: Free to use forever with no licensing fees for any scale.
- Learning Curve: Mastering performance tuning and advanced features takes time.
- Operational Overhead: Managing it yourself requires significant DBA knowledge.
- Memory Usage: Each connection consumes a dedicated process, requiring careful pool management.
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 PostgreSQL
The most professional, reliable, and powerful database choice for any serious software project.