ClickHouse
ClickHouse provides an open-source analytical database and managed data platform for real-time analytics, observability, and AI workloads.
- Artificial Intelligence
- Palo Alto, California, United States
Company Overview
ClickHouse is a data infrastructure company that develops an open-source, column-oriented database management system designed for fast analytical queries across large volumes of data. The original project began in 2009 and was open-sourced in 2016. ClickHouse, Inc. was incorporated in 2021 and provides commercial products and managed cloud services built around the database.
Its offerings include ClickHouse Cloud, a managed analytics service; ClickStack, an observability platform for logs, metrics, traces, and session replays; and ClickHouse Managed Postgres, which combines transactional database capabilities with analytical processing. The company also supports workloads involving machine learning, generative AI, and large language model observability.
ClickHouse serves customers across technology, financial services, cybersecurity, e-commerce, and other industries. In January 2026, it raised $400 million in Series D financing and announced the acquisition of Langfuse, an LLM observability platform. The company reported more than 4,000 customers and over $250 million in annual run-rate revenue in May 2026.
QueryFeedz Insight
ClickHouse operates at the intersection of data infrastructure, real-time analytics, observability, and AI application development. Its core technology is an open-source columnar database optimized for analytical workloads that require fast queries over large datasets. The company extends this technology through managed cloud services and specialized products for application monitoring, data warehousing, and AI observability.
The company also introduced managed PostgreSQL services and ClickHouse Agents, broadening its offering toward transactional workloads and AI-driven analytics. Its reported $250 million-plus annual run-rate revenue in May 2026 signals substantial commercial adoption, although this is a company-reported operating metric rather than audited annual revenue.
Funding & Investors
- Latest funding
- $400
- Latest round
- Series D
- Latest funding date
- January 2026
Investors
- Dragoneer Investment Group — Lead investor
- Bessemer Venture Partners
- GIC
- Index Ventures
- Khosla Ventures
- Lightspeed Venture Partners
- Accounts advised by T. Rowe Price Associates
- WCM Investment Management
Founders
- Aaron Katz — Co-Founder and CEO. Alexey Milovidov — Co-Founder and CTO. Yury Izrailevsky — Co-Founder and President
Company Links
Harmonic Visit Harmonic website (opens in a new tab)
Artificial Intelligence
Gecko Robotics Visit Gecko Robotics website (opens in a new tab)
Artificial Intelligence
Gecko Robotics combines AI, advanced robotics, and industrial data to improve the inspection, maintenance, and modernization of critical infrastructure.
Island (Island Technology, Inc.) Visit Island (Island Technology, Inc.) website (opens in a new tab)
Artificial Intelligence
Island is an enterprise cybersecurity startup building a secure browser, AI governance platform, and enterprise networking infrastructure. Its unified platform helps organizations control application access, protect sensitive data, and govern both human and AI-agent activity across the digital workplace.
Ataraxis AI Visit Ataraxis AI website (opens in a new tab)
Artificial Intelligence
Ataraxis AI is a clinical AI startup using digital pathology and multimodal foundation models to personalize cancer prognosis and treatment selection. Its Ataraxis Breast platform aims to help oncologists estimate recurrence risk and predict individual treatment response.