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Companies using Abstract API and Slack

6 companies in our data have public evidence for both Abstract API and Slack, and 6 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
55%of Abstract API users
under 1%of Slack users
6name both as subprocessors

Companies using one are 6.6 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

CompanyAbstract APISlack
Cloud Codecloudcode.proCloud Code supplies OSINT solutions and a modular platform for collecting and analyzing big data and open source information.Data and analytics
Employment Heroemploymenthero.comEmployment Hero provides an AI-powered platform for HR, payroll, hiring and rostering.HR and recruiting
Marker.ioMarker.io is a website feedback tool that lets reviewers annotate live pages and send issues to project management tools.Developer tools
SavvyCal Appointmentssavvycal.appSavvyCal Appointments provides a scheduling engine and API that computes availability, enforces scheduling rules, and books appointments atomically.Healthcare
SavvyCalsavvycal.comSavvyCal provides scheduling links that let recipients overlay their own calendar to find a meeting time.Productivity and collaboration
Zerozero.incSales

The two technologies

Abstract API is a platform of APIs that provides unified email, phone and IP signals. It is used to verify users, block risky ones, and enrich data.

Summarized from abstractapi.com on 8 Nov 2026.

55% of the 11 companies we see using Abstract API also show the other.

All 11 companies using Abstract API11 name it as a subprocessor

Slack

by Salesforce · Productivity

Slack is a collaboration platform where teams chat, share files, and work together in channels. It is used for team communication, connecting apps and agents, and automating everyday work.

Summarized from slack.com on 8 Nov 2026.

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

All 1,926 companies using Slack1,335 name it as a subprocessorMore in Productivity

Other pairs

Companies with their own evidence for both.

More with Abstract API

Cloudflare11companiesAmazon Web Services9companiesGoogle Workspace9companiesOpenAI8companiesStripe6companiesGoogle Analytics5companies

More with Slack

Cloudflare1,804companiesGoogle Workspace1,571companiesAmazon Web Services1,293companiesStripe891companiesGoogle Tag Manager878companiesGoogle808companies

Questions

How many companies use both Abstract API and Slack?

6 companies in StrataDB's data have public evidence for both, and 6 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 Abstract API and Slack?

Cloud Code, Employment Hero, Marker.io, SavvyCal Appointments and SavvyCal, and 1 more company. Each one links to the evidence behind it.

How does StrataDB know a company uses Abstract API and Slack?

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 Abstract API and Slack

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