STACKIT PostgreSQL Flex is a fully managed PostgreSQL service, which guarantees high avialability and scalability. The service automates maintenance work, patches, updates and backups.
PostgreSQL (aka Postgres) is a free object-relational database management system (RDBMS) that is (further) developed by an open source community. Further information about the PostgreSQL project here.
STACKIT PostgreSQL Flex currently offer the Postgres version 12, 13 & 14