ClickHouse is an open-source column-oriented DBMS (columnar database management system) for online analytical processing (OLAP) that allows users to generate analytical reports using SQL queries in real-time.

Its technology works 100-1000x faster than traditional database management systems and processes hundreds of millions to over a billion rows and tens of gigabytes of data per server per second. With a widespread user base around the globe, the technology has received praise for its reliability, ease of use, and fault tolerance.

In September of 2021 in San Fransisco, CA, ClickHouse incorporated to house the open source technology with an initial $50 million investment from Index Ventures and Benchmark Capital. On October 28, 2021 the company received Series B funding totaling $250 million at an evaluation of $2 billion from Coatue Management, Altimeter Capital, and other investors. The company continues to build the open source project and engineering the cloud technology.

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