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ClickHouse is an open-source, column-oriented analytics database designed for fast queries on large datasets. It’s commonly used for real-time dashboards, product analytics, observability (logs/metrics/traces), and other workloads where teams need low-latency SQL queries at scale.
If you’re looking for “ClickHouse user count,” the most accurate public numbers typically refer to developer adoption (community size), open-source activity (GitHub stars), and ClickHouse Cloud customers (paying/managed-service usage). This page pulls those metrics into one place with clear year labels.
Answer (quick snapshot)
ClickHouse’s website states there are 100k+ developers using ClickHouse, and the company reported 3,000+ customers on its fully managed service, ClickHouse Cloud (Jan 2026). The open-source project also has about 46k GitHub stars.
ClickHouse key metrics
| Metric | Figure | Year / Date | Source |
|---|---|---|---|
| Developer adoption (site claim) | 100k+ developers | ClickHouse site accessed 2026 | ClickHouse.com |
| ClickHouse Cloud customers | 3,000+ customers | Jan 16, 2026 | ClickHouse blog (Series D announcement) |
| ARR growth (company statement) | 250%+ YoY | Jan 16, 2026 | ClickHouse blog (Series D announcement) |
| GitHub stars (open-source repo) | 46.1k | Repo accessed 2026 | GitHub |
| GitHub forks (open-source repo) | 8.1k | Repo accessed 2026 | GitHub |
| Project start (company history) | Work began in 2009 | Company history page | ClickHouse “Our Story” |
| Open-source release (company history) | Released open-source (Apache 2.0) in 2016 | Company history page | ClickHouse “Our Story” |
| Historical user stat (legacy post) | 100,000 users | 2023 (legacy claim) | Replaced by “100k+ developers” wording |
What is ClickHouse?
ClickHouse is built for analytical workloads: fast aggregations, scans, and group-bys across very large tables. Because it’s column-oriented, it can read only the columns needed for a query, compress data efficiently, and return results quickly—making it a fit for real-time reporting and high-volume event data.
Where ClickHouse is most commonly used
- Product analytics: event tracking, funnels, cohorts, and real-time dashboards.
- Observability: querying logs, metrics, and traces at high cardinality and high ingestion rates.
- Real-time BI / operational reporting: low-latency analytics for internal teams and customer-facing dashboards.
- Data warehousing “speed layer”: offloading expensive queries from slower/older systems.
ClickHouse timeline (high-level)
- 2009: Work begins on ClickHouse (company history).
- 2016: ClickHouse is released as an open-source project under Apache 2.0.
- 2022: ClickHouse launches an early access program for its cloud service (company history).
- 2026: ClickHouse announces a $400M Series D and reports 3,000+ ClickHouse Cloud customers.
FAQ
How many people use ClickHouse?
ClickHouse doesn’t publish a single, audited “active user” figure across all deployments. However, ClickHouse’s website states there are 100k+ developers using ClickHouse, which is the clearest public adoption metric.
How many customers does ClickHouse Cloud have?
In a January 16, 2026 company announcement, ClickHouse reported 3,000+ customers on ClickHouse Cloud.
Is ClickHouse open source?
Yes. ClickHouse is an open-source project (Apache 2.0). ClickHouse’s “Our Story” page notes the open-source release occurred in 2016.
When did ClickHouse start?
ClickHouse’s company history says work on ClickHouse began in 2009.
What’s the difference between ClickHouse and ClickHouse Cloud?
ClickHouse refers to the open-source database you can self-host. ClickHouse Cloud is the fully managed service operated by ClickHouse, Inc.
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