Hanko is an open-source authentication and user management platform developed by a Germany-based team for web and mobile applications. It supports multiple authentication methods, including passwords, passkeys, multi-factor authentication, and single sign-on, and provides APIs and framework-agnostic web components for integrating authentication into applications. Hanko can be deployed on a customer's own infrastructure or used through Hanko Cloud, giving development teams control over their authentication environment and user data.