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Technologies / OpenAI / Similarweb

Companies using OpenAI and Similarweb

6 companies in our data have public evidence for both OpenAI and Similarweb, and 5 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.

6companies use both
under 1%of OpenAI users
100%of Similarweb users
5name both as subprocessors

Companies using one are 7.1 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

CompanyOpenAISimilarweb
Affilaeaffilae.comAffilae provides an affiliate and influence marketing platform with tools for managing campaigns, affiliates, and payments.Marketing
Brainitobrainito.comBrainito provides a marketing workspace with tools for website audits, SEO, content, email, SMS, ads and analytics.AI and machine learningMarketing
ClickUpclickup.comClickUp provides a workspace that connects work, knowledge, and conversations to AI.AI and machine learningProductivity and collaboration
marketingcloudfx.com
WebFXwebfx.comWebFX is a digital marketing agency that provides SEO, content marketing, and lead generation services.Marketing
ListPluslistplus.aiListPlus helps CRM teams, RevOps and GTM engineers find B2B leads and check and enrich contact data.Sales

The two technologies

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

Similarweb

Analytics

Similarweb is a digital intelligence platform that provides data on website traffic, app usage, and competitor activity. It is used by marketing, research, sales, and retail teams to benchmark performance, analyze competitors, and guide SEO, advertising, and growth decisions.

Summarized from similarweb.com on 8 Nov 2026.

100% of the 6 companies we see using Similarweb also show the other.

All 6 companies using Similarweb5 name it as a subprocessorMore in Analytics

Industries

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

Marketing3AI and machine learning2

Other pairs

Companies with their own evidence for both.

More with OpenAI

Cloudflare3,281companiesGoogle Workspace2,475companiesAnthropic1,995companiesAmazon Web Services1,887companiesStripe1,647companiesGoogle1,549companies

More with Similarweb

Anthropic6companiesCloudflare6companies

Questions

How many companies use both OpenAI and Similarweb?

6 companies in StrataDB's data have public evidence for both, and 5 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 OpenAI and Similarweb?

Affilae, Brainito, ClickUp, marketingcloudfx.com and WebFX, and 1 more company. Each one links to the evidence behind it.

How does StrataDB know a company uses OpenAI and Similarweb?

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 OpenAI and Similarweb

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.

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