SingleStore offers a scalable in-memory database that delivers speed and throughput advantages while retaining SQL and ACID compliance. By offering a familiar relational interface to an in-memory data tier, SingleStore empowers developers with the technology web-scale companies use to cope with massive traffic and growth. SingleStore offers orders of magnitude improvements in write and read performance and simplifies application development and maintenance. It was formerly known as MemSQL. The company was founded in 2011 and is based in San Francisco, California.

Volt Active Data develops a data platform designed to augment existing big data investments. It replaces the various layers typically required to make contextual decisions on streaming data with a single, unified layer that can handle ingest to action in milliseconds. The platform features include real-time business decisions; zero-lag streaming aggregation; and monetized streaming data. Its customers include Openet, Huawei, Connexity, Nokia, Mitsubishi Electric, and others. Volt Active Data, formerly VoltDB, was founded in 2010 and is based in Bedford, Massachusetts.

Crate.io is a scalable real-time database for the machine data era, such as information from the Internet of Things that stores massive amounts of data over the cloud and provides it via SQL connections.

Ahana offers a managed service platform for Presto on AWS with the vision to simplify open data lake analytics. Ahana is used by tech companies in various industries. The company was founded in 2020 and is based in San Mateo, California.

Redis Labs is a private computer software company that provides a database management system marked as "NoSQL" as an open source software or as a service using cloud computing.

EnterpriseDB (EDB) is an enterprise Postgres company that delivers an open source-based data management platform, optimized for greater scalability, security, and reliability. It helps to reduce risk and complexity with enterprise-proven management tools, security enhancements, and Oracle compatibility. The company was founded in 2004 and is based in Bedford, Massachusetts.