There are also quite some NewSQL solutions out there. TiDB, CockroachDB, Spanner, just to name a few. Besides, the first two are open source... https://github.

There are also quite some NewSQL solutions out there. TiDB, CockroachDB, Spanner, just to name a few. Besides, the first two are open source... https://github.com/pingcap/tidb https://github.com/pingcap/tidb https://github.com/cockroachdb/cockroach https://github.com/cockroachdb/cockroach They provide the features of both RDBMS, such as ACID transactions, SQL, and the scalability of NoSQL.