Company Overview

ClickHouse was originally open-sourced by Russian internet company Yandex in 2016, as a high-performance column-oriented DBMS designed for real-time Online Analytical Processing (OLAP). In 2021, Yury Izrailevsky, Vlad Smirnov, and Alexey Milovidov co-founded ClickHouse Inc, headquartered in California. The company raised a $300 million Series B in 2022 at a valuation of approximately $2 billion.

ClickHouse is renowned for its extreme query performance, capable of scanning hundreds of billions of rows per second on commodity hardware. It is widely used for real-time analytics, log processing, time-series data, A/B testing, and more. As of 2026, ClickHouse is one of the most popular open-source OLAP databases on GitHub.

Core Products

🐧 ClickHouse OSS (Open Source)

  • Fully open source under Apache 2.0 license
  • Columnar storage, vectorized execution, real-time data ingestion
  • SQL support compatible with MySQL protocol
  • High compression ratio reducing storage costs
  • Distributed deployment with replication support

☁️ ClickHouse Cloud

  • Fully managed cloud service
  • Auto-scaling, pay-as-you-go pricing
  • Built-in high availability, backup and disaster recovery
  • Multi-cloud support (AWS, GCP)
  • SQL console, monitoring dashboard and management tools

πŸ”Œ ClickHouse Connect

  • Official connectors and drivers
  • Supports Python, Node.js, Java, Go and more
  • JDBC and ODBC drivers
  • Integration with dbt, Airbyte, Kafka and other tools

🚒 ClickHouse Kubernetes Operator

  • Automated deployment and management on Kubernetes
  • Custom Resource Definitions (CRD) support
  • Auto-scaling and rolling upgrades

Key Milestones

  • 2009: Internal ClickHouse project started at Yandex
  • 2016: Open-sourced on GitHub under Apache 2.0 license
  • 2020: Rapid community growth, became one of the most popular open-source OLAP databases
  • 2021: ClickHouse Inc officially founded, Series A funding
  • 2022: $300M Series B funding, ClickHouse Cloud launched
  • 2023: ClickHouse Cloud generally available on AWS and GCP
  • 2024: ClickHouse Kubernetes Operator released
  • 2025+: Continued query performance optimization, expanding real-time analytics ecosystem

Market Position & Competitors

ClickHouse holds a leading position in the real-time analytics database market:

  • Snowflake: Cloud data warehouse, enterprise data platform focus
  • Apache Druid: Real-time analytics database, strong in time-series analysis
  • Apache Pinot: Real-time OLAP database, low-latency analytical queries
  • StarRocks: Open-source OLAP database, emphasis on extreme query speed
  • TimescaleDB: PostgreSQL-based time-series database
  • Databricks: Data lakehouse platform, data engineering and ML focus

Core Strengths

Extreme Query Performance: Columnar storage + vectorized execution engine, industry-leading single-table query speed
Fully Open Source: Apache 2.0 license, active community, rich ecosystem
Real-time Ingestion: Millisecond-level real-time data insertion and querying
High Compression Ratio: Columnar storage delivers 5-10x compression, significantly reducing storage costs
SQL Compatible: Standard SQL support reduces learning and migration costs
Cloud Native: ClickHouse Cloud and Kubernetes Operator support modern deployment

Key Events

Year Event Domain Description
2021 ClickHouse Inc founded Company Core Yandex team established the company
2022 Series B $300M Funding Valuation of ~$2 billion
2022 ClickHouse Cloud launched Cloud Service Managed cloud service went live
2024 Kubernetes Operator released Cloud Native K8s automated deployment support