Apps similar to Passage Identity include Auth0, which has a free version. Other options are Amazon Cognito, Microsoft Entra External ID, Google Cloud Identity Platform and Azure Active Directory B2C. In total there are five Identity Management Tools like Passage Identity for the web.
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:
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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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Microsoft Entra External ID is a 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.
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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.
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