Rauthy is a lightweight and easy to use OpenID Connect Identity Provider. It aims to be simple to both set up and operate, with very secure defaults and lots of config options, if you need the flexibility. It puts heavy emphasis on Passkeys and a very strong security in general. The project is written in Rust to be as memory efficient, secure and fast as possible, and it can run on basically any hardware. If you need Single Sign-On support for IoT or headless CLI tools, it’s got you covered as well. You get High-Availability, client branding, UI translation, a nice Admin UI, Events and Auditing, and many more features. By default, it runs on top of Hiqlite and does not depend on an external database (Postgres as an alternative) to make it even simpler to operate, while scaling up to millions of users easily.