ClickHouse - OLAP Database
What is ClickHouse?
ClickHouse is an open-source columnar OLAP (Online Analytical Processing) database developed by Yandex in 2016. It is designed for ultra-fast analytical queries on large datasets, real-time analytics, and business intelligence.
Benefits of ClickHouse in Business Projects
Why is ClickHouse considered the fastest analytical database in the world? Here are the key benefits backed by facts and the experience of leading enterprises.
Drawbacks of ClickHouse – An Honest Assessment
Every technology has limitations. Here are the main drawbacks of ClickHouse and how they can be addressed in real-world enterprise projects.
What is ClickHouse Used For?
The main ClickHouse use cases in 2025 – with examples from top tech companies and our own analytics projects.
Real-Time Analytics and Business Intelligence
Real-time dashboards, KPI monitoring, business intelligence
Yandex.Metrica (20B events/day), Cloudflare Analytics, Uber analytics
Log Analysis and System Monitoring
Centralized logging, application monitoring, security analytics
GitLab logging, Spotify event tracking, ContentSquare analytics
IoT Analytics and Telemetry
Sensor data analysis, device telemetry, time-series analytics
S7 Airlines fleet monitoring, smart city sensors, industrial IoT
Financial Reporting and Compliance
Financial reports, compliance, risk analytics, fraud detection
Deutsche Bank risk analytics, Razorpay financial reporting
FAQ: ClickHouse – Frequently Asked Questions
Complete answers to common questions about the ClickHouse database.