Auth0

Sure, Auth0 Auth0 is awesome.

But have you considered these open source alternatives?

They are free, self-hostable and community-driven.

Check by yourself:  Zitadel , Keycloak  Keycloak , Authelia  Authelia , Authentik  Authentik ,  Hanko .

  1. So is Keycloak Keycloak

    Open Source Identity and Access Management

    ★ 36.3K Security Identity management License: Apache-2.0

    Add authentication to applications and secure services with minimum effort. No need to deal with storing users or authenticating users.

    Keycloak provides user federation, strong authentication, user management, fine-grained authorization, and more.

    Read more about Keycloak

  2. So is Authelia Authelia

    The Single Sign-On Multi-Factor portal for web apps

    ★ 28.6K Security Identity management License: Apache-2.0

    Authelia is an open-source authentication and authorization server providing two-factor authentication and single sign-on (SSO) for your applications via a web portal. It acts as a companion for reverse proxies by allowing, denying, or redirecting requests.

    preview

    Read more about Authelia

  3. So is Hanko

    The Complete Authentication and User Management Solution for the Passkey Era

    ★ 9K Security Identity management License: AGPLv3, MIT

    Hanko is an open-source authentication and user management solution with a focus on moving the login beyond passwords while being 100% deployable today.

    Read more about Hanko