Have a look at YugabyteDB. If you can tolerate Postgres 11.2, it would work for you. Yugabyte offers a managed service, on premise and you can roll out your own

Have a look at YugabyteDB. If you can tolerate Postgres 11.2, it would work for you. Yugabyte offers a managed service, on premise and you can roll out your own system. I’m not affiliated with the company.