TLDR: ClickHouse has announced an extension of its Series C financing, bringing in new investors like Citi Ventures, to further develop its data platform for real-time analytics, data warehousing, observability, and AI/ML. The company’s CEO, Aaron Katz, emphasized the platform’s role in enabling lightning-fast analytics on massive datasets, crucial for the ‘Era of AI’. This additional funding follows an earlier $350 million Series C round, bringing the total funding to over $650 million, alongside a $100 million credit facility.
ClickHouse, a prominent provider of real-time analytics solutions, has successfully extended its Series C financing, attracting new investors including Citi Ventures. This latest funding round, announced in a press release on Tuesday, October 7, 2025, is earmarked to accelerate the development and expansion of its data platform, which is designed to meet the escalating demands of real-time analytics, data warehousing, observability, and artificial intelligence/machine learning (AI/ML) applications.
Aaron Katz, CEO of ClickHouse, highlighted the strategic importance of this investment, stating, “This extended Series C financing will accelerate our mission to empower organizations with lightning-fast analytics on massive datasets.” He further elaborated on the platform’s capabilities, noting, “Our data platform gives customers the speed, flexibility and efficiency they need to tackle their most critical use cases at scale, helping them unlock value faster in the era of AI.”
Vibhor Rastogi, head of AI investing at Citi Ventures, echoed this sentiment, emphasizing ClickHouse’s transformative impact on data utilization. Rastogi remarked, “The demand for fast, interactive analytics has never been greater, especially as data-driven AI initiatives accelerate.”
This recent capital injection builds upon a previously announced $350 million Series C financing round in May, which was led by Khosla Ventures. That initial round, combined with earlier investments, brought ClickHouse’s total funding to over $650 million. Additionally, the company secured a $100 million credit facility led by Stifel and Goldman Sachs.
ClickHouse also revealed in its Tuesday press release that it now serves a robust customer base of over 2,000 organizations. The company has significantly expanded its platform offerings, introducing ClickStack, a high-performance observability stack, and enhancing its capabilities for real-time analytics workloads with MongoDB Change Data Capture. Further improvements include enhanced data lake support and specialized tools for building agent-facing applications.
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To cater to the stringent requirements of regulated sectors, ClickHouse has launched ClickHouse Private, a private cloud version of its commercial offering. It has also integrated Federal Information Processing Standards (FIPS) compliance into ClickHouse Government, addressing the needs of highly regulated environments. Earlier in March, ClickHouse acquired HyperDX, an open-source observability platform, aiming to create a comprehensive observability solution that integrates session replay, exceptions, logs, infrastructure metrics, and distributed tracing.
