Authorizer
Your data, your control. Fully open source, authentication, etc.
...Bring your database and have complete control over the user information. You can self-host authorizer instances and connect to any database (Currently supports 11+ databases including Postgres, MySQL, SQLite, SQLServer, YugaByte, MariaDB, PlanetScale, CassandraDB, ScyllaDB, MongoDB, ArangoDB). This guide helps you practice using Authorizer to evaluate it before you use it in a production environment. It includes instructions for installing the Authorizer server in local or standalone mode.