Auth0 is an identity and access management platform designed for developers and businesses to implement authentication and authorization for custom applications. The company operates as a product unit within Okta and provides Identity-as-a-Service (IDaaS) solutions focused on customer identity and access management (CIAM). The Auth0 platform offers authentication capabilities including single sign-on (SSO), multi-factor authentication (MFA), passwordless authentication, social login integrations, and SAML implementation. The platform includes features such as breached password detection, adaptive MFA, self-service account management, and integration with Microsoft Active Directory. Auth0 provides APIs and libraries compatible with multiple development frameworks including Laravel, Ruby on Rails, and PHP-based systems. Auth0 serves organizations across various sectors including healthcare, government, and commercial enterprises. The platform is designed to handle large-scale deployments, with implementations supporting hundreds of thousands of users. Organizations use Auth0 to consolidate identity management across multiple applications and systems, reducing the need for custom-built authentication infrastructure. The platform emphasizes developer experience with well-documented APIs, pre-built libraries for common frameworks, and tools for building custom authentication flows and branding. Auth0 enables organizations to migrate from legacy authentication systems while maintaining compatibility with existing IT infrastructure. The service model allows development teams to outsource identity management complexity while focusing on core product development.