Side by side

Auth0 vs Keycloak

Both stand on api authentication platforms. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Keycloak provides single sign-on, multiple authentication methods, directory synchronization, and fine-grained authorization policies as open-source software. Some features need enabling, and the project recommends Red Hat build of Keycloak for users who need long-term support for specific versions.

Visit Keycloak

The facts

	Auth0	Keycloak
Free plan	Not published	Yes
Open source	Not published	Not published
Runs on	Web, API	API, Linux, Self-hosted, Web, Windows
Lowest paid plan	Essentials: $35 a month	Free or on request
Plans published	4	1
Maker	Okta, Inc.	Not published
Website	auth0.com	keycloak.org
On api authentication platforms	#11 of 12	#7 of 12

Auth0: what it does well

Keycloak: what it does well

Supports OpenID Connect, OAuth 2.0, and SAML
Offers passkeys, passwords, certificates, and two-factor methods
Synchronizes users from LDAP and Active Directory
Provides server, container, and operator deployments

What to know first

Some features are disabled by default
Preview features may not be generally available as supported features
Long-term support for specific versions points to Red Hat build

Alternatives to Auth0 Alternatives to Keycloak The whole list