Auth.js (NextAuth.js) vs Keycloak
On the evidence we track, Keycloak leads this comparison with a composite score of 72/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for auth & identity software. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Auth.js (NextAuth.js)
An open-source authentication solution that integrates with web frameworks to provide OAuth-based authentication with customizable sign-in pages.
Keycloak
LeaderCentralized authentication and authorization platform that manages user identity and access control across applications, reducing the need for individual apps to build their own login systems.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
- GitHub
Auth.js (NextAuth.js)
- GitHub
Keycloak
Leader- LDAP
- Active Directory
- Kerberos
- Kubernetes
- Apache APISIX
- OpenTelemetry
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.