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Technologies / Anthropic / Lob

Companies using Anthropic and Lob

13 companies in our data have public evidence for both Anthropic and Lob, and 12 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.

13companies use both
under 1%of Anthropic users
45%of Lob users
12name both as subprocessors

Companies using one are 3.6 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

CompanyAnthropicLob
airSlateairslate.comairSlate builds automation products for editing and signing documents, automating business processes, and acquiring new customers.Productivity and collaboration
AWeberaweber.comAWeber provides email marketing, automation, landing pages, and ecommerce tools.Marketing
Cartacarta.comCarta provides software for managing equity, fund administration, and legal and compliance workflows for private capital.Finance and accounting software
Communitrakcommunitrak.comCommunitrak provides all-in-one software for managing HOAs online, including payments, messaging, violation tracking, a website builder, amenity reservations, and access control.
DocHubdochub.comDocHub provides online tools to edit, sign, share, and create forms for PDF documents.Productivity and collaboration
Fundraise Upfundraiseup.comFundraise Up provides an AI-powered fundraising platform for nonprofits, including checkout, payment methods, peer-to-peer fundraising, and donor management tools.
Heritage Passportheritagepassport.coHeritage Passport helps people find out whether their family line qualifies for citizenship by descent in 42 countries and prepares the paperwork to prove it.
Januaryjanuary.comJanuary uses AI to collect debts for creditors by engaging consumers across voice, SMS, and chat.AI and machine learningFintech
Koolaykoolay.comKoolay provides a nonprofit software platform combining donor CRM, website, donations, events, grant discovery, AI grant writing, and e-sign, plus done-for-you grant writing services.
Lunoslunos.aiLunos provides AI agents that automate accounts receivable and accounts payable tasks such as collections, dispute management, cash application, and payment orchestration.AI and machine learningFinance and accounting software
Modern Treasurymoderntreasury.comModern Treasury provides an API for onboarding customers, opening accounts, and moving money across fiat and stablecoins with compliance and ledgering built in.Payments
SignNowsignnow.comairSlate SignNow provides electronic signature and document workflow tools that let users sign, send, track, and store documents from any device, along with templates, fillable fields, and an API for embedding eSignatures in other apps.Productivity and collaboration
AI-STORMSai-storms.comAI-STORMS provides a storm-response workspace that connects weather signals, property research, owner data, eligibility review, approved outreach, and outcome tracking.

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 2,910 companies we see using Anthropic also show the other.

All 2,910 companies using Anthropic2,239 name it as a subprocessorMore in AI and LLM providers

Lob is a direct mail platform that lets businesses create, personalize, route, and fulfill physical mail campaigns. It is used to send automated direct mail, with printing and delivery handled through its Print Delivery Network.

Summarized from lob.com on 8 Nov 2026.

45% of the 29 companies we see using Lob also show the other.

All 29 companies using Lob26 name it as a subprocessor

Industries

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

Productivity and collaboration3Finance and accounting software2AI and machine learning2

Other pairs

Companies with their own evidence for both.

More with Anthropic

Cloudflare2,905companiesGoogle Workspace2,134companiesOpenAI1,997companiesAmazon Web Services1,556companiesStripe1,532companiesGoogle1,415companies

More with Lob

Cloudflare29companiesAmazon Web Services22companiesGoogle Workspace22companiesOpenAI19companiesTwilio19companiesGoogle15companies

Questions

How many companies use both Anthropic and Lob?

13 companies in StrataDB's data have public evidence for both, and 12 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 Lob?

airSlate, AWeber, Carta, Communitrak and DocHub, and 8 more companies. Each one links to the evidence behind it.

How does StrataDB know a company uses Anthropic and Lob?

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 Lob

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