Auth0 is described as 'You can connect any application (written in any language or on any stack) to Auth0 and define its Connection, the method used to authenticate the users of that application:' and is a identity management tool in the development category. There are more than 50 alternatives to Auth0, not only websites but also apps for a variety of platforms, including SaaS, Self-Hosted, Linux and Mac apps. The best Auth0 alternative is Keycloak, which is both free and Open Source. Other great sites and apps similar to Auth0 are AuthKit, ZITADEL , Authelia and Hanko.
Open Source Identity and Access Management for modern Applications and Services.
Keycloak is the most popular Linux & Self-Hosted alternative to Auth0.
Keycloak is the most popular Open Source & free alternative to Auth0.
AuthKit is a Radix-powered open source authentication UI built for effortless customizations. User Management is the backend platform handling email verification, account linking, bot blocking, organization modeling, and more.
AuthKit is the most popular Web-based alternative to Auth0.
Secure authentication management for your application. Customize as you grow, with easy APIs and programmable workflows. Focus on growing, your login is in good hands.
ZITADEL is the most popular SaaS alternative to Auth0.
Protect your applications with Single Sign-On and 2 Factor. Authelia is an open-source full-featured authentication server available on Github.
Hanko is a modern open source Authentication & User Management system – built and hosted in the EU. Alternative to Clerk, Auth0, Stytch, Descope.
Stack is an open-source, self-hostable, and highly customizable authentication and user management system.
Kanidm is an identity management server, acting as an authority on account information, authentication and authorisation within a technical environment.
Clerk is more than a "sign-in box." Integrate complete user management UIs and APIs, purpose-built for React, Next.js, and the Modern Web.
FusionAuth is an auth for any app. Get everything you need for secure registration and user management in minutes. Single-tenant, on-prem or private cloud, custom emails with localization, social login, and more.
Almost everyone thinks FusionAuth is a great Auth0 alternative.
FusionAuth is the most popular Windows & Mac alternative to Auth0.
Okta's Workforce and Customer Identity Clouds enable secure access, authentication, and automation—putting identity at the heart of business security and growth.
Most users think Okta is a great Auth0 alternative.
Okta is the most popular commercial alternative to Auth0.
Pomerium is an identity and context-aware proxy that enables secure access to applications without a client. Pomerium provides a standardized interface to add access control to applications regardless of whether the application itself has authorization or authentication baked-in.
Amazon Cognito lets you add user sign-up/sign-in and access control to your web and mobile apps quickly and easily. Cognito scales to millions of users, and supports sign-in with social identity providers such as FB, Google, and Amazon, and SAML 2.0.
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Similar feature set, but on-premise and free.