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Technologies / Harness / Slack

Companies using Harness and Slack

4 companies in our data have public evidence for both Harness and Slack, 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.

4companies use both
80%of Harness users
under 1%of Slack users
4name both as subprocessors

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

CompanyHarnessSlack
Chargify is now Maxiochargify.comMaxio provides a billing and financial operations platform for subscription, usage-based, and hybrid billing, along with quoting, revenue recognition, and reporting.Finance and accounting software
Ignite Readingignite-reading.comIgnite Reading provides 1:1 early literacy intervention with certified reading tutors using a Science of Reading-aligned curriculum.Education
Maxiomaxio.comMaxio provides billing, subscription management, revenue recognition, and financial reporting software.Finance and accounting software
Pantherpanther.comPanther provides a security platform that investigates alerts, stores outcomes, and supports detection engineering.Cybersecurity

The two technologies

Harness

Developer tools

Harness is an Autonomous SDLC Platform. It is used to ship AI code, catch risk before it ships, and govern every pipeline.

Summarized from harness.io on 8 Nov 2026.

80% of the 5 companies we see using Harness also show the other.

All 5 companies using Harness5 name it as a subprocessorMore in Developer tools

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 1,936 companies we see using Slack also show the other.

All 1,936 companies using Slack1,343 name it as a subprocessorMore in Productivity

Other pairs

Companies with their own evidence for both.

More with Harness

Amazon Web Services5companiesCloudflare5companiesHubSpot5companies

More with Slack

Cloudflare1,821companiesGoogle Workspace1,585companiesAmazon Web Services1,305companiesStripe898companiesGoogle Tag Manager884companiesGoogle812companies

Questions

How many companies use both Harness and Slack?

4 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 Harness and Slack?

Chargify is now Maxio, Ignite Reading, Maxio and Panther. Each one links to the evidence behind it.

How does StrataDB know a company uses Harness 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 Harness 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
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