Open source RDBMS that forked from MySQL. Add a version-specific tag like mariadb-10.5 if that context is important.
MariaDB Server is a high performing open source (GPLv2) relational databases, forked from MySQL.
The development aims to maintain high compatibility with MySQL, ensuring a library binary equivalency and exact matching with MySQL APIs and commands. MariaDB developers continue to develop new features and improve performance to better serve its users.
For more information, including compatibility details, please see MariaDB versus MySQL - Compatibility