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ClickHouse has closed a $400 million Series D funding round led by Dragoneer Investment Group, alongside the acquisition of Langfuse for LLM observability and the launch of a native Postgres service, positioning the company to unify transactional and analytical workloads while accelerating its role in real-time analytics and AI infrastructure.
Quick Intel
ClickHouse, a leader in real-time analytics, data warehousing, observability, and AI/ML, announced the close of its $400 million Series D financing. The round was led by Dragoneer Investment Group and included 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.
This funding follows rapid growth for ClickHouse Cloud, the company’s fully managed service, which now supports more than 3,000 customers with annual recurring revenue (ARR) increasing over 250 percent year over year. Recent adopters and expanders include Capital One, Lovable, Decagon, Polymarket, and Airwallex, joining an established customer base featuring AI innovators and major brands such as 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.”
Dragoneer Investment Group, founded by Marc Stad in 2012, led the round with its research-driven, selective approach to category-defining companies. The firm has backed several leading data platforms and foundational AI companies over the past decade.
“Major platform shifts ultimately reward the infrastructure companies that sit closest to production,” said Christian Jensen, Partner at Dragoneer Investment Group. “As models become more capable, the bottleneck moves to data infrastructure. ClickHouse stood out because it delivers the performance, efficiency, and reliability required for AI systems operating at scale.”
ClickHouse enables net-new workloads by making real-time analytics cost-effective at scale, often embedded in customer-facing products where performance directly affects end-user experience. The platform supports mission-critical, always-on systems with high query volumes, tight latency, and continuous observability needs driven by AI production.
ClickHouse has acquired Langfuse, the leading open-source LLM observability platform. LLM observability focuses on monitoring non-deterministic AI outputs for accuracy, safety, and alignment in production environments—a critical need as AI agents integrate into core workflows.
Langfuse has achieved rapid adoption, closing 2025 with over 20,000 GitHub stars, more than 26 million monthly SDK installs, and widespread use among Fortune 500 companies.
“We built Langfuse on ClickHouse because LLM observability and evaluation is fundamentally a data problem,” said Marc Klingen, CEO of Langfuse. “Now, as one team, we can deliver a tighter end-to-end product: faster ingestion, deeper evaluation, and a shorter path from a production issue to a measurable improvement.”
ClickHouse announced an enterprise-grade native Postgres service, deeply integrated with its analytics engine. Built in partnership with Ubicloud—an open-source cloud provider with expertise from Citus Data, Heroku, and Microsoft—the service delivers high-performance, scalable Postgres backed by NVMe storage and native CDC capabilities.
Users can sync transactional data to ClickHouse in a few clicks for up to 100X faster analytics, with a unified query layer powered by a native Postgres extension. This eliminates the need for separate systems, enabling developers to build real-time AI applications spanning transactions and analytics seamlessly.
“Postgres and ClickHouse complement each other naturally, and are key for AI applications. Together, we’re delivering an integrated stack that removes complexity for teams, with production-grade Postgres for transactions and ClickHouse for analytics working as one,” said Umur Cubukcu, Co-CEO and Co-Founder, Ubicloud.
ClickHouse has expanded globally through partnerships including Japan Cloud and Microsoft Azure OneLake, while hosting major user events worldwide. Recent product enhancements include broader data lake support (Apache Iceberg, Delta Lake), advanced full-text search for observability, and lightweight updates optimized for AI workloads.
With this Series D funding, the Langfuse acquisition, and the native Postgres launch, ClickHouse strengthens its position as a unified data platform powering the next wave of AI infrastructure.
About ClickHouse
ClickHouse is a fast, open-source columnar database management system built for real-time data processing and analytics at scale. Engineered for high performance, ClickHouse Cloud delivers exceptional query speed and concurrency, making it ideal for applications that demand instant insight from massive volumes of data. As AI agents become increasingly embedded in software and are generating far more frequent and complex queries, ClickHouse brings a high-throughput, low-latency engine, purpose-built to meet this challenge. Trusted by leading companies like Sony, Tesla, Memorial Sloan Kettering, Lyft, and Instacart, ClickHouse helps teams unlock insights and drive smarter decisions with a scalable, efficient, and modern data platform.
About Dragoneer Investment Group
Dragoneer is a growth-oriented investment firm founded with over $30 billion in assets under management. The firm partners with founders and management teams building category-defining companies in both the public and private markets. More than 50 Dragoneer-backed companies have gone public. Dragoneer investments include Airbnb, Amwins, Atlassian, Databricks, Datadog, Meta, Nubank, OpenAI, Revolut, ServiceNow, Snowflake, Spotify, and Uber.
About Langfuse
Langfuse is an open-source platform for building, testing, and monitoring LLM applications/agents. Teams use Langfuse to trace and debug agent workflows, run evaluations, and continuously measure and improve the quality of AI outputs in production. Langfuse is available as a managed cloud service and can be self-hosted at production scale. Langfuse is one of the fastest growing LLM engineering platforms, with 20,470 GitHub stars, 26M+ SDK installs per month, and 6M+ Docker pulls, and is trusted by 19 of the Fortune 50 and 63 of the Fortune 500 companies.
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