An open source, object-relational database system with over 35 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.
"We use PostgreSQL as the database backing our control plane. Ubicloud also offers a managed PostgreSQL cloud service with all the bells and whistles (backup/restore, HA, etc.). If you'll be at PGConf.EU next month, please drop by our booth and say hi!"