Open-source identity infrastructure that scales with your business Zitadel delivers enterprise-grade identity management without the enterprise complexity. Built for modern applications, it provides secure authentication, authorization, and user management through clean APIs and intuitive interfaces. Why developers choose Zitadel: 1. Zero vendor lock-in - Open source with self-hosting options 2. Multi-tenant by design - Isolate customers while sharing infrastructure 3. Modern standards - Native support for OpenID Connect, OAuth2, SAML, and Passkeys/FIDO2 4. Developer-friendly - Comprehensive APIs, webhooks, and customizable workflows 5. Production-ready - Built-in audit trails, monitoring, and enterprise security Perfect for SaaS platforms, B2B applications, and any product requiring sophisticated user management. Deploy in minutes, customize as you scale. Key Features: Multi-tenancy, Passkeys/FIDO2, Self-service management, OpenID Connect, OAuth2, SAML, LDAP, OTP, Audit trails, API-first architecture