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Technologies / Castle.io / Google Analytics

Companies using Castle.io and Google Analytics

2 companies in our data have public evidence for both Castle.io and Google Analytics, 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
under 1%of Google Analytics 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.ioGoogle Analytics
GitBookgitbook.comGitBook is a documentation platform that flags outdated content and fixes it.Developer tools
Signablesignable.comSignable provides electronic signature software for sending, signing, and tracking documents.

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

Google Analytics

by Google · Analytics

Google Analytics is a service that connects customer and campaign data across devices and platforms in one place and uses Google AI to surface insights. It is used to understand how users come to and interact with a website and to inform marketing and budget decisions.

Summarized from business.google.com on 8 Nov 2026.

under 1% of the 8,120 companies we see using Google Analytics also show the other.

All 8,120 companies using Google Analytics627 name it as a subprocessorMore in Analytics

Other pairs

Companies with their own evidence for both.

More with Google Analytics

Cloudflare8,129companiesGoogle Workspace5,402companiesGoogle Tag Manager3,406companiesAmazon Web Services2,178companiesHubSpot1,947companiesNext.js1,833companies

Questions

How many companies use both Castle.io and Google Analytics?

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 Google Analytics?

GitBook and Signable. Each one links to the evidence behind it.

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

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 Google Analytics

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