European alternatives to Auth0

Auth0 is an identity and access management platform from the United States, acquired by Okta in 2021. Developers use it to hand off login to a hosted service: social and enterprise sign-in, single sign-on across applications, multi-factor authentication, user directories and standards such as OAuth 2.0, OpenID Connect and SAML. It removes the need to build and maintain password handling and session logic yourself.

An identity provider holds the account records of everyone who uses your product, and it sits on the critical path of every login, so both jurisdiction and availability come into the decision. A European alternative to Auth0 gives you that component from a supplier inside the EU or EFTA. ZITADEL and cidaas offer managed identity platforms, Keycloak is the open source project many teams run themselves, and Bare.ID provides it as a managed service.