ZITADEL provides a complete identity infrastructure that goes beyond simple login screens. The platform handles the full authentication lifecycle including social logins (Google, GitHub, Apple, Microsoft), enterprise SSO via SAML and OIDC federation, passwordless authentication with FIDO2/Passkeys, and multi-factor authentication with TOTP and SMS. Every authentication event is recorded in an immutable audit log built on event sourcing architecture, making compliance reporting straightforward.
What distinguishes ZITADEL from alternatives like Auth0 or Keycloak is its first-class multi-tenancy support. Each organization within your ZITADEL instance gets isolated user stores, custom branding, separate identity provider configurations, and delegated administration—without deploying separate instances. This makes it particularly well-suited for B2B SaaS products where each customer organization needs their own login experience and user management.
ZITADEL is written in Go and designed for cloud-native deployment with CockroachDB or PostgreSQL as the backing store. It ships with a polished management console, comprehensive REST and gRPC APIs, SDKs for popular frameworks (Next.js, Angular, Flutter, Go, .NET), and Terraform provider for infrastructure-as-code workflows. The project has over 10,000 GitHub stars and is licensed under Apache 2.0, with a managed cloud offering for teams that prefer not to self-host.
