ClickHouse is the high-performance columnar analytics database built at Yandex, now used in production at Cloudflare, Uber, eBay, Spotify, and Sentry for sub-second queries over billions of rows.
Source: GitHub · fetched 2026-04-17
ClickHouse is a columnar OLAP database released as open source by Yandex in 2016. It is Apache 2.0 licensed. The engine is built around vectorized query execution, compressed columnar storage, and aggressive parallelism, which lets it execute complex analytical queries over billions of rows in sub-second time on commodity hardware.
The company, ClickHouse Inc., was spun out of Yandex in 2021 and now runs ClickHouse Cloud, a fully-managed offering on AWS, GCP, and Azure. The database has become the default choice for product analytics backends, observability data platforms, time-series analytics at scale, and internal BI tooling that needs speed without a Snowflake-sized budget.
Production ClickHouse deployments include Cloudflare (trillions of rows, one of the largest public deployments), Uber, eBay, Spotify, Sentry, PostHog, Deutsche Bank, Bloomberg, Tinybird's customers, and the analytics backends of many observability vendors. It is rapidly becoming the default analytics database for new devtools and SaaS companies.
ClickHouse users are data engineers building analytics pipelines, backend engineers shipping product-analytics features, platform engineers running self-hosted clusters, and data scientists running interactive queries. These personas buy ETL/ELT tools (Airbyte, Fivetran), visualization (Superset, Metabase, Grafana), streaming (Kafka, Redpanda), and observability.
According to the ClickHouse README: “ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time.” (source)
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ClickHouse is used in production at Cloudflare, Uber, eBay, Spotify, ByteDance, and Yandex (the original creator). ClickHouse Cloud is used across fintech, analytics SaaS, and real-time monitoring platforms..
ClickHouse, Inc., founded in 2021 by the original Yandex ClickHouse team after spinning out the project. The codebase is Apache 2.0 licensed and hosted at github.com/ClickHouse/ClickHouse.
Apache Druid (real-time OLAP), Apache Pinot (LinkedIn-origin, similar niche), DuckDB (single-node analytical SQL), Google BigQuery (managed cloud OLAP), Snowflake, and Amazon Redshift for cloud data warehouses.
ClickHouse has 2,839 contributors (GitHub, 2026/04). It is one of the more actively contributed open-source projects in its category, with contributions from both individual developers and corporate engineering teams.
Yes. ClickHouse is production-ready: it has 46.9k GitHub stars, 2,839 contributors (GitHub, 2026/04), and is last released Apr 2026. It is used in production at large-scale organizations and has a mature release cadence.
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