Keycloak vs Pulumi
The ultimate side-by-side head-to-head analysis for 2026.
Short answer
- Price: not directly comparable — Keycloak is free, Pulumi is free tier available.
- How to start: Keycloak is free, Pulumi 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 We do not publish a quality score, because we do not have one we can stand behind.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
Pulumi
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 Pulumi if:
Teams whose infrastructure logic has outgrown a declarative template.
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
Pulumi: pros & cons
- Real languages with real tooling
- Type checking catches mistakes before deploy
- Covers all major clouds
- Programming languages allow complexity to creep in
- Smaller community than Terraform
- State management still needs care
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 Pulumi
A good fit for engineers who would rather write code than templates. Terraform is easier to hire for.