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Technologies / Anthropic / Lettermint B.V.

Companies using Anthropic and Lettermint B.V.

6 companies in our data have public evidence for both Anthropic and Lettermint B.V., and 4 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 Anthropic users
33%of Lettermint B.V. users
4name both as subprocessors

Companies using one are 2.7 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

CompanyAnthropicLettermint B.V.
Filentlyfilently.comFilently is an AI tool that recognizes, renames, and files new documents automatically in Google Drive.AI and machine learningProductivity and collaboration
Lizaliza.appLiza is an AI coding and project management tool that combines projects, sprints, an AI assistant, Git workflow and team chat.AI and machine learningDeveloper tools
nurionnurion.comNurion provides a private, EU-sovereign AI workspace that combines meetings, documents, chat, mail, signing, task boards and an API for AI agents.AI and machine learningProductivity and collaboration
Pinpointerpinpointer.seCompliance and riskConstruction
botts.aiAI and machine learning
Custos AIcustosai.euCustos reads business emails, looks up information in a company's existing systems, takes actions like drafting quotes or creating orders, and replies.

The two technologies

Anthropic

AI and LLM providers

Anthropic is a public benefit corporation dedicated to securing the benefits of AI and mitigating its risks. It is used for the responsible development and maintenance of advanced AI for the long-term benefit of humanity.

Summarized from anthropic.com on 8 Nov 2026.

under 1% of the 2,926 companies we see using Anthropic also show the other.

All 2,926 companies using Anthropic2,246 name it as a subprocessorMore in AI and LLM providers

Lettermint B.V.

Email and communications

Lettermint is an email delivery service for transactional emails, broadcast newsletters and marketing campaigns, and inbound email processing. It is used to send and receive emails through SDKs, an API, SMTP, a CLI and integrations.

Summarized from lettermint.co on 8 Nov 2026.

33% of the 18 companies we see using Lettermint B.V. also show the other.

All 18 companies using Lettermint B.V.15 name it as a subprocessorMore in Email and communications

Industries

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

AI and machine learning4Productivity and collaboration3

Other pairs

Companies with their own evidence for both.

More with Anthropic

Cloudflare2,903companiesGoogle Workspace2,132companiesOpenAI1,995companiesAmazon Web Services1,553companiesStripe1,533companiesGoogle1,414companies

More with Lettermint B.V.

Cloudflare18companiesGoogle9companiesGoogle Workspace8companiesHetzner7companiesNext.js7companiesMistral AI5companies

Questions

How many companies use both Anthropic and Lettermint B.V.?

6 companies in StrataDB's data have public evidence for both, and 4 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 Anthropic and Lettermint B.V.?

Filently, Liza, nurion, Pinpointer and botts.ai, and 1 more company. Each one links to the evidence behind it.

How does StrataDB know a company uses Anthropic and Lettermint B.V.?

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 Anthropic and Lettermint B.V.

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