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:



Microsoft Entra External ID is described as 'Next-generation customer identity and access management (CIAM) solution for managing all external identities. These include customers, citizens, patients, partners, suppliers, and contractors within a single, unified platform' and is a identity management tool in the network & admin category. There are five alternatives to Microsoft Entra External ID for SaaS, Web-based and Amazon Web Services. The best Microsoft Entra External ID alternative is Auth0, which is free. Other great apps like Microsoft Entra External ID are Amazon Cognito, Google Cloud Identity Platform, Passage Identity and Azure Active Directory B2C.
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:



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.

Identity Platform is a customer identity and access management (CIAM) system that can help you add identity and access management functionality to your applications, protect user accounts, and scale with confidence.


Azure Active Directory B2C (Azure AD B2C) is a customer identity access management (CIAM) solution that enables you to sign up and sign in your customers into your apps and APIs.



