MariaDB [1] is a community developed fork of MySQL, so you can feel free to use that in place of MySQL. Another alternative would be Percona [2] which is a dro

MariaDB [1] is a community developed fork of MySQL, so you can feel free to use that in place of MySQL. Another alternative would be Percona [2] which is a drop-in replacement for Oracle MySQL. About PostgreSQL I haven't had that much of personal experience with it, but for sure I plan to learn it, because it has been battle-tested for years with lots of well-known projects, such as Django framework, for instance. [1] https://github.com/MariaDB/server https://github.com/MariaDB/server [2] https://github.com/percona/percona-server https://github.com/percona/percona-server