ClickHouse

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 structured query language (SQL) queries in real-time. ClickHouse Inc. is headquartered in the San Francisco Bay Area with the subsidiary, ClickHouse B.V., based in Amsterdam, Netherlands. ClickHouse, Inc. was incorporated in San Francisco, California, in September 2021 to commercialize the open-source ClickHouse database. The company was initially funded with US$50 million from Index Ventures and Benchmark Capital, with participation from Yandex N.V. and others. On 28 October 2021, the company announced a US$250 million Series B funding round at a valuation of US$2 billion, led by Coatue Management, Altimeter Capital, and others. In May 2025, ClickHouse raised US$350 million in a Series C funding round led by Khosla Ventures, with participation from BOND, IVP, Battery Ventures, Bessemer Venture Partners, and existing investors including Index Ventures, Lightspeed Venture Partners, GIC, Benchmark Capital, Coatue Management, FirstMark Capital, and Nebius Group. The round valued the company at approximately US$6.35 billion and brought total funding to more than US$650 million.