ZITADEL is an open-source identity infrastructure platform that provides authentication and authorization capabilities for applications. The platform is designed for developers and organizations that need to manage user identities across consumer, business, and employee use cases. Core capabilities include: - Hosted login pages with customizable branding - Multi-factor authentication (MFA) and passkey/passwordless support - Social login integrations (Google, Microsoft, GitHub, and others via pre-built templates) - Single Sign-On (SSO) - Role-based access control (RBAC) - Multi-tenant architecture built natively into the platform - API-first design with gRPC and REST APIs - Service account and machine identity management - Custom workflow execution via "ZITADEL Actions" (event-triggered scripts) ZITADEL supports both a cloud-hosted (SaaS) model and self-hosting options, allowing organizations to deploy across different data regions. The platform is OpenID Certified, ISO 27001 certified, GDPR compliant, and SOC 2 Type II attested. The platform targets software developers and organizations building B2B and B2C applications, providing SDKs for languages and frameworks including Go, Angular, React, Next.js, Flutter, and Python. It is available as an open-source project on GitHub with a commercial cloud offering. ZITADEL is headquartered in San Francisco, California, and serves customers across 69 countries. Notable customers include Klaviyo, Fiddler AI, and various healthcare and financial services organizations.