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Technologies / Kickbox / Slack

Companies using Kickbox and Slack

6 companies in our data have public evidence for both Kickbox and Slack, 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
55%of Kickbox users
under 1%of Slack users
5name 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

CompanyKickboxSlack
Convertrconvertr.ioConvertr provides a platform that helps go-to-market teams standardize lead data, automate data processing and manage campaigns.Marketing
Krakenkraken.techKraken provides an operating system and AI products for energy utilities.Energy and climate
Lushalusha.comLusha provides verified B2B contact and company data, enrichment, and buying-signal intelligence through its workspace, API, browser extension, and AI connectors.Sales
Nylasnylas.comNylas provides APIs for email, calendar, contacts, and meeting data that sync across providers like Gmail, Microsoft Graph, Exchange, and IMAP.CommunicationsDeveloper tools
Uploadcareuploadcare.comUploadcare provides file upload, storage, transformation, and delivery infrastructure for apps.Cloud and infrastructureDeveloper tools
ListPluslistplus.aiListPlus helps CRM teams, RevOps and GTM engineers find B2B leads and check and enrich contact data.Sales

The two technologies

Kickbox

Email and communications

Kickbox is an email verification platform that checks whether email addresses are valid, active, and safe to send to. It is used to clean email lists and block invalid addresses at signup to help keep data clean and improve deliverability.

Summarized from kickbox.com on 8 Nov 2026.

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

All 11 companies using Kickbox8 name it as a subprocessorMore in Email and communications

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 1,934 companies we see using Slack also show the other.

All 1,934 companies using Slack1,341 name it as a subprocessorMore in Productivity

Industries

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

Sales2Developer tools2

Other pairs

Companies with their own evidence for both.

More with Kickbox

Cloudflare11companiesAmazon Web Services10companiesGoogle Workspace9companiesStripe7companiesHubSpot6companiesOpenAI6companies

More with Slack

Cloudflare1,812companiesGoogle Workspace1,579companiesAmazon Web Services1,298companiesStripe895companiesGoogle Tag Manager880companiesGoogle811companies

Questions

How many companies use both Kickbox and Slack?

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 Kickbox and Slack?

Convertr, Kraken, Lusha, Nylas and Uploadcare, and 1 more company. Each one links to the evidence behind it.

How does StrataDB know a company uses Kickbox 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 Kickbox 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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