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Technologies / Castor / Google Tag Manager

Companies using Castor and Google Tag Manager

2 companies in our data have public evidence for both Castor and Google Tag Manager. Each company below links to the source for every claim. Our coverage is partial, so this is not everyone.

2companies use both
100%of Castor users
under 1%of Google Tag Manager users
0name 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

CompanyCastorGoogle Tag Manager
Cypress.ioCypress provides an open-source app and a cloud platform for testing web applications, including end-to-end, component, and API testing.
JWXjwx.comJWX provides technology platforms for video streaming, publishing, and advertising.Media and entertainment

The two technologies

Castor is an AI-native clinical trial platform that combines EDC, eCOA, eConsent, and data management in one platform. It is used to capture, manage, and review clinical trial and real-world evidence study data.

Summarized from castoredc.com on 8 Nov 2026.

100% of the 2 companies we see using Castor also show the other.

All 2 companies using Castor

Google Tag Manager

by Google · Analytics

Google Tag Manager is a tag management system that lets you configure and deploy tags on your website or mobile app through a web interface. It is used to add and update tags, such as measurement and marketing optimization tags, without editing your site code.

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

under 1% of the 9,704 companies we see using Google Tag Manager also show the other.

All 9,704 companies using Google Tag Manager63 name it as a subprocessorMore in Analytics

Other pairs

Companies with their own evidence for both.

More with Google Tag Manager

Cloudflare9,709companiesGoogle Workspace6,334companiesGoogle Analytics3,666companiesHubSpot2,961companiesWordPress2,812companiesAmazon Web Services2,721companies

Questions

How many companies use both Castor and Google Tag Manager?

2 companies in StrataDB's data have public evidence for both. Our coverage is partial, so the real number is higher.

Which companies use Castor and Google Tag Manager?

Cypress.io and JWX. Each one links to the evidence behind it.

How does StrataDB know a company uses Castor and Google Tag Manager?

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 Castor and Google Tag Manager

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