ClickHouse

The First Real-Time Search Analytics Database

Firebolt Core is a free, self-hosted edition of Firebolt's distributed query engine (https://www.firebolt.io/);

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries.

Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)

A distributed, fast open-source graph database featuring horizontal scalability and high availability

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse.