ZITADEL is an open-source identity and access management platform that provides authentication, authorization, and user management capabilities for applications. It supports multiple authentication methods including OAuth2, OIDC, SAML, passkeys, and 2FA/MFA, while offering features like single sign-on, multi-tenancy, and SCIM for user provisioning. Developers use ZITADEL to outsource identity infrastructure rather than building these systems from scratch, with built-in support for modern security standards and compliance requirements like FIPS 140-3.

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