Best Database as a Service (DBaaS) SaaS companies
MariaDB
MariaDB is a high performance, open source database that helps the world's busiest websites deliver more content, faster.
Amazon Relational Database Service (RDS)
Amazon Relational Database Service (RDS) is a web service that makes it easy to set up, operate, and scale a relational DB in the cloud: Amazon Aurora, PostgreSQL, MySQL, MariaDB, Oracle, and Microsoft SQL Server.
Amazon DocumentDB
Amazon DocumentDB (with MongoDB compatibility) is a fast, scalable, highly available, and fully managed document database service that supports MongoDB workloads.
SimpleDB
SimpleDB is a highly available and flexible non-relational data store that offloads the work of database administration.
ArangoDB
ArangoDB is a distributed, free, and open-source database with a flexible data model for documents, graphs, and key-values. Build high performance applications using a convenient SQL-like query language or JavaScript extensions.
Aiven for Apache Cassandra
Leverage the complete open source ecosystem of extensions and tools to create highly-performant data pipelines for event-driven applications on all major clouds..
Managed Apache Cassandra
Fully managed and automated monitoring and alerting for Apache Cassandra with 24/7 support.