ClickHouse

Fast open-source columnar database for real-time analytics

ClickHouse is an open-source columnar database built for real-time analytics. Processes billions of rows per second with SQL, making it the engine behind Tinybird , PostHog , and Cloudflare analytics.
Column-oriented storage compresses data 10-50x and enables blazing aggregation queries. ClickHouse Cloud offers a managed serverless option. Not for transactional workloads — use alongside Postgres or MongoDB .

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