Open Source Alternatives to Auth0
An identity and access management platform that provides authentication, authorization, and user management for applications and AI agents. It supports universal login, multifactor authentication, and fine-grained permissions across web, mobile, and API services.
Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to Auth0 give you an option you fully own. You can self-host them, so your data stays on infrastructure you control. This page lists 8 open source alternatives to Auth0. The most popular are Keycloak, Authentik and SuperTokens. Most use the Apache-2.0 or AGPL-3.0 license, and 8 offer an official Docker image.
Keycloak
An identity and access management server providing single sign-on, user federation, and fine-grained authorization for applications.
Authentik
A self-hosted identity provider for single sign-on that manages authentication and authorization via multiple industry standards.
SuperTokens
Provides secure login and session management for web applications through self hosted user identity infrastructure.
Zitadel
An identity and access management platform providing single sign on, multi tenancy, and API first authentication.
Logto
An identity solution providing multi-tenancy, enterprise SSO, and RBAC for SaaS and agent-based AI applications.
Hanko
Provides authentication and user management with support for passkeys, multi factor authentication, and social login integrations.
Authgear
Manage user authentication, single sign-on, and identity access through a self-hosted or managed identity provider.
Tesseral
Provides multi-tenant authentication and identity management for B2B software with support for SSO and RBAC.
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