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Technologies / Castle.io / ClickHouse

Companies using Castle.io and ClickHouse

2 companies in our data have public evidence for both Castle.io and ClickHouse, and 2 name both in their own subprocessor list. Each company below links to the source for every claim. Our coverage is partial, so this is not everyone.

2companies use both
50%of Castle.io users
1%of ClickHouse users
2name both as subprocessors

The companies

Strongest evidence first: a company naming both in its own subprocessor list comes before one seen on its website or in job postings.

Subprocessor listPrivacy policyWebsiteJob postings

CompanyCastle.ioClickHouse
GitBookgitbook.comGitBook is a documentation platform that flags outdated content and fixes it.Developer tools
lovable.dev

The two technologies

Castle.io

Security and identity

Castle.io is a suite of APIs for bot detection and abuse prevention. It is used to stop bots and fraud through behavioral analysis.

Summarized from docs.castle.io on 8 Nov 2026.

50% of the 4 companies we see using Castle.io also show the other.

All 4 companies using Castle.ioMore in Security and identity

ClickHouse is an open-source OLAP database for real-time analytics, and it is also offered as a fully managed cloud service called ClickHouse Cloud. It is used to analyze large volumes of data with fast queries, such as for real-time dashboards, observability, data warehousing, and machine learning workloads.

Summarized from clickhouse.com on 8 Nov 2026.

1% of the 322 companies we see using ClickHouse also show the other.

All 322 companies using ClickHouse268 name it as a subprocessorMore in Data

Other pairs

Companies with their own evidence for both.

More with ClickHouse

Cloudflare310companiesGoogle Workspace284companiesAmazon Web Services259companiesOpenAI172companiesStripe162companiesAnthropic155companies

Questions

How many companies use both Castle.io and ClickHouse?

2 companies in StrataDB's data have public evidence for both, and 2 of them name both in their own subprocessor list, the strongest evidence we hold. Our coverage is partial, so the real number is higher.

Which companies use Castle.io and ClickHouse?

GitBook and lovable.dev. Each one links to the evidence behind it.

How does StrataDB know a company uses Castle.io and ClickHouse?

From four kinds of public evidence: subprocessor lists, privacy policies, website code and job postings. Each is kept apart with its source and the date we saw it. A company missing here means we found no evidence, not that it does not use them.

Find every company using Castle.io and ClickHouse

See the full list with the source for each company, and run the same lookup for any technology from the API, Claude or your browser.

  • Every company and vendor, with its public source
  • 100 API calls a month, plus MCP and the Chrome extension
  • Work email only. No card, no sales call