ClickHouse, which is approximately 28% owned by Nebius, has now announced its major expansion into AI and data infrastructure. The company raised $400 million in a “Series D” funding round, which would imply a valuation of $15 billion.
To accelerate growth, the company acquired the open-source Langfuse platform, which enables more precise monitoring and evaluation of large language models (LLMs); in addition, the company launched a new Postgres service. This integrated solution combines both transactions and analytics, making it easier for developers to build better AI applications on a single unified platform.
SAN FRANCISCO, January 16, 2026–(BUSINESS WIRE)–ClickHouse, a leader in real-time analytics, data warehousing, observability, and AI/ML, announced today the close of its Series D financing, raising $400 million. The round was led by Dragoneer Investment Group, with participation from Bessemer Venture Partners, GIC, Index Ventures, Khosla Ventures, Lightspeed Venture Partners, accounts advised by T. Rowe Price Associates, Inc., and WCM Investment Management.
The financing follows a period of sustained, accelerating growth for ClickHouse. The company now serves more than 3,000 customers on its fully managed service, ClickHouse Cloud, with ARR growing more than 250 percent year over year. Over the past three months, customers including Capital One, Lovable, Decagon, Polymarket, and Airwallex have adopted the platform or expanded existing deployments. These customers join an established base that includes AI innovators and major brands like Meta, Cursor, Sony, and Tesla.
“ClickHouse was built to deliver exceptional performance and cost efficiency for the most demanding data workloads, and this momentum validates that strategy,” said Aaron Katz, CEO of ClickHouse. “As we look toward the future, we are adding support for unified transactional and analytical workloads, so developers can build any type of applications powered by AI on the best technical foundation. And we are expanding our offering to include LLM observability, so AI application builders can evaluate the quality and behavior of AI outputs as they move into production. Additional funding, combined with continued product execution, positions us to deliver the leading data and LLM observability platform in the AI era.”
https://sg.finance.yahoo.com/news/clickhouse-raises-400m-series-d-143000473.html