Heroku Postgres - Heroku Postgres is an SQL database as a service.
ObjectBox - ObjectBox empower edge computing with an edge device database and synchronization solution for Mobile & IoT. Store and sync data from edge to cloud.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
Microsoft SQL Server Compact - Bring Microsoft SQL Server 2017 to the platform of your choice. Use SQL Server 2017 on Windows, Linux, and Docker containers.
MySQL - The world's most popular open source database
VoltDB - In-memory relational DBMS capable of supporting millions of database operations per second