ClickHouse
Funding History
| Series B · 10/2021 | $2.0B |
|---|---|
| Series C · 05/2025 | $6.3B |
| Series D · 01/2026 | $15.0B |
About
ClickHouse, Inc. builds and commercializes the ClickHouse database, an open-source, column-oriented OLAP database management system originally developed at Yandex starting in 2009 and open-sourced in 2016. The company incorporated independently in 2021 and is headquartered in the San Francisco Bay Area.
- CEO
- Aaron Katz
- Employees
- 600+
- Headquarters
- San Francisco Bay Area, CA
- Founded
- 2021 (technology originated 2009)
- Website
- clickhouse.com
Overview
ClickHouse is the company behind the ClickHouse database, a fast, open-source column-oriented database management system built for real-time analytics on large volumes of data. Work on the underlying technology began in 2009 inside Yandex, where Alexey Milovidov and a small team built an experimental engine to generate real-time analytical reports; it was open-sourced under an Apache 2.0 license in 2016.
The company was spun out as an independent business and incorporated in Delaware in 2021, headquartered in the San Francisco Bay Area, with co-founders Aaron Katz (CEO), Alexey Milovidov (CTO) and Yury Izrailevsky (President, Product and Engineering).
ClickHouse offers both the open-source database and a fully managed cloud service, ClickHouse Cloud, and has increasingly positioned its platform as infrastructure for AI-native and agent-facing applications, including a January 2026 acquisition of Langfuse, an open-source LLM observability platform.
Customers cited by the company include Anthropic, Tesla, Meta, Sony, Capital One, Mercado Libre, Lyft, Instacart, Decagon and Memorial Sloan Kettering.
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