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Technologies / Grammarly / OpenAI

Companies using Grammarly and OpenAI

9 companies in our data have public evidence for both Grammarly and OpenAI, and 8 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.

9companies use both
82%of Grammarly users
under 1%of OpenAI users
8name both as subprocessors

Companies using one are 5.8 times as likely as the average company in our data to show evidence of the other.

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

CompanyGrammarlyOpenAI
Airtimeairtime.comAirtime provides tools for recording, presenting, and sharing video.CommunicationsProductivity and collaboration
Global Thinkingglobalthinking.aiGlobal Thinking AI helps businesses implement AI tools and provides AI consulting, chatbots, automation, CRM, reputation management, sales funnels, and websites.AI and machine learningConsulting and services
Hunter Web Serviceshunter.ioHunter is an email outreach platform that finds and verifies company and contact email addresses.Sales
marketingcloudfx.com
Ringostatringostat.comRingostat provides an AI-powered business phone and marketing performance platform that combines calls, chats, messengers and SMS with call tracking and analytics.CommunicationsData and analytics
Samsarasamsara.comSamsara provides a connected operations platform with fleet telematics, AI dash cams, asset tracking, and compliance tools.Logistics and supply chain
Supersidesuperside.comSuperside provides creative design, production, and marketing services, including ad creative, video production, web design, and AI consulting.Design and creativeMarketing
WebFXwebfx.comWebFX is a digital marketing agency that provides SEO, content marketing, and lead generation services.Marketing
Perconapercona.comPercona provides open source software, support, and services for MySQL, PostgreSQL, MongoDB, and Valkey/Redis databases.Consulting and services

The two technologies

Grammarly

Productivity

Grammarly is an AI writing partner that helps turn thoughts into writing. It is used for paragraph rewrites, tone suggestions, proofreading, and spotting AI-generated text.

Summarized from grammarly.com on 8 Nov 2026.

82% of the 11 companies we see using Grammarly also show the other.

All 11 companies using Grammarly10 name it as a subprocessorMore in Productivity

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 3,285 companies we see using OpenAI also show the other.

All 3,285 companies using OpenAI2,522 name it as a subprocessorMore in AI and LLM providers

Industries

Among the companies above, by our own classification of their homepage.

Consulting and services3Communications2Marketing2

Other pairs

Companies with their own evidence for both.

More with Grammarly

Cloudflare11companiesGoogle11companiesGoogle Workspace9companiesAmazon Web Services8companiesAnthropic7companiesSentry7companies

More with OpenAI

Cloudflare3,268companiesGoogle Workspace2,464companiesAnthropic1,987companiesAmazon Web Services1,885companiesStripe1,638companiesGoogle1,541companies

Questions

How many companies use both Grammarly and OpenAI?

9 companies in StrataDB's data have public evidence for both, and 8 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 Grammarly and OpenAI?

Airtime, Global Thinking, Hunter Web Services, marketingcloudfx.com and Ringostat, and 4 more companies. Each one links to the evidence behind it.

How does StrataDB know a company uses Grammarly 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 Grammarly 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
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