Insomnia vs Keycloak
The ultimate side-by-side head-to-head analysis for 2026.
Short answer
- Price: not directly comparable — Insomnia is free tier available, Keycloak is free.
- How to start: Insomnia is free tier available, Keycloak is 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 We do not publish a quality score, because we do not have one we can stand behind.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.
Insomnia
Keycloak
Category
Developer Tools
Developer Tools
Base Price
Free tier
Free
Public API
Yes
Yes
Mobile app
No
No
Open source / self-hostable
Yes
Yes
SSO (SAML)
Yes
Yes
Choose Insomnia if:
Developers who want to test APIs without a heavy platform.
Choose Keycloak if:
Organisations that need enterprise identity without a per-user bill.
Insomnia: pros & cons
- Clean interface that stays out of the way
- Supports GraphQL and gRPC as first class
- Open-source core
- Smaller ecosystem than Postman
- Team features require a paid plan
- Account requirement irritates some users
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
Our verdict on Insomnia
A lighter alternative to Postman. If your team already lives in Postman collections, switching costs more than it saves.
Our verdict on Keycloak
The serious open-source answer to Auth0. Budget for the operations, because the licence saving is not free.