Keycloak vs Firebase Authentication

Learn how Keycloak and Firebase Authentication differ in their key features like authentication, enterprise auth, security, user management and compliance, so you can decide which of these authentication providers is best for you.

Keycloak

Secure apps with open source identity management

Visit Keycloak Read more

Details:

B2B
Yes
B2C
No
Open Source
Yes
Self-hosted
Yes

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Firebase Authentication

Secure multi-platform authentication in under 10 lines

Visit Firebase Authentication Read more

Details:

B2B
Yes
B2C
Yes
Open Source
No
Self-hosted
No

Feature Comparison

Keycloak offers broader feature coverage than Firebase Authentication, supporting 30 features compared to 22. Keycloak fully covers authentication and machine to machine (m2m) authentication and more, and both tools fully cover branding.

Passwordless Authentication

Keycloak

Firebase Authentication

Social Connections

Keycloak

Firebase Authentication

Passkeys

Keycloak

Firebase Authentication

Long Lived Sessions

Keycloak

Session idle and max lifespans and offline sessions can be adjusted to keep sessions alive for longer periods

Firebase Authentication

Session Management

Keycloak

Admins can view and revoke user and client sessions, sign out all sessions, and configure session lifespans in the admin console

Firebase Authentication

Multi-Language

Keycloak

The UI is internationalized. Administrators can enable multiple languages and users can choose their language at login or in the account/admin consoles

Firebase Authentication

Email templates and FirebaseUI can be localized; set the language with a `languageCode` property or override CSS for more than 40 languages

	Keycloak	Firebase Authentication
Passwordless Authentication
Social Connections
Passkeys
Long Lived Sessions	Session idle and max lifespans and offline sessions can be adjusted to keep sessions alive for longer periods
Session Management	Admins can view and revoke user and client sessions, sign out all sessions, and configure session lifespans in the admin console
Multi-Language	The UI is internationalized. Administrators can enable multiple languages and users can choose their language at login or in the account/admin consoles	Email templates and FirebaseUI can be localized; set the language with a `languageCode` property or override CSS for more than 40 languages

Compliance Comparison

Firebase Authentication offers significantly broader coverage than Keycloak, supporting 6 certifications and regulatory frameworks compared to 0 for Keycloak. Since Keycloak is open source and does not include compliance certifications, you’ll need to manage compliance yourself.