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Technologies / Litmus / OpenAI

Companies using Litmus and OpenAI

3 companies in our data have public evidence for both Litmus and OpenAI, and 3 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.

3companies use both
38%of Litmus users
under 1%of OpenAI users
3name 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

CompanyLitmusOpenAI
HubSpothubspot.comHubSpot provides marketing, sales, and customer service software on one platform.Marketing
Lab Digitallabdigital.nlLab Digital helps businesses transform their commerce platforms and build scalable, composable architectures.AI and machine learningE-commerce
Marigoldmeetmarigold.comMarigold provides marketing tools that use automation and personalization to reach audiences across channels.Marketing

The two technologies

Litmus

Email and communications

Litmus is an email marketing platform that is now part of Validity Engage. It is used to build, test, monitor, and review emails, and to check deliverability and benchmark email campaigns.

Summarized from litmus.com on 8 Nov 2026.

38% of the 8 companies we see using Litmus also show the other.

All 8 companies using Litmus7 name it as a subprocessorMore in Email and communications

OpenAI

AI and LLM providers

OpenAI is a platform that provides an API for building with OpenAI models. It is used to access models, tools, and services for tasks such as text generation, image generation, audio, and agents.

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

under 1% of the 3,304 companies we see using OpenAI also show the other.

All 3,304 companies using OpenAI2,530 name it as a subprocessorMore in AI and LLM providers

Other pairs

Companies with their own evidence for both.

More with Litmus

Cloudflare8companiesAmazon Web Services7companiesTwilio6companies

More with OpenAI

Cloudflare3,285companiesGoogle Workspace2,478companiesAnthropic1,997companiesAmazon Web Services1,889companiesStripe1,650companiesGoogle1,551companies

Questions

How many companies use both Litmus and OpenAI?

3 companies in StrataDB's data have public evidence for both, and 3 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 Litmus and OpenAI?

HubSpot, Lab Digital and Marigold. Each one links to the evidence behind it.

How does StrataDB know a company uses Litmus and OpenAI?

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 Litmus and OpenAI

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