ClickHouse

ClickHouse is an open-source, column-oriented database management system that generates analytical data reports in real time using SQL queries. Its columnar storage and execution engine are tuned for fast aggregations and interactive analysis over very large datasets.

ClickHouse runs as a database server and installs on Linux, macOS, and FreeBSD with a single shell command. You query it with SQL, making it a natural fit for dashboards, event analytics, and other read-heavy reporting workloads where scan speed matters.

The project is developed by ClickHouse Inc and licensed under Apache 2.0. It can be self-hosted, or run through the managed ClickHouse Cloud service for teams that prefer not to operate clusters themselves.