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Technologies / Close / Slack

Companies using Close and Slack

12 companies in our data have public evidence for both Close 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.

12companies use both
60%of Close users
1%of Slack users
5name both as subprocessors

Companies using one are 7.3 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

CompanyCloseSlack
Clerk.ioClerk.io provides AI-powered search, product recommendations, chat, audience segmentation, and email tools for online stores.AI and machine learningE-commerce
Countfirecountfire.comCountfire provides PDF takeoff and estimating software for mechanical and electrical projects.Construction
FareHarborfareharbor.comFareHarbor provides booking software and a business management platform for tours, activities, rentals and attractions.Travel and hospitality
Funnelyticsfunnelytics.ioFunnelytics is a visual journey mapping and analytics platform that maps customer journeys and connects them to data to show where revenue is leaking.Data and analyticsE-commerce
Zokozoko.ioZoko provides a WhatsApp platform for Shopify brands that includes a shared team inbox, targeted campaigns, and AI agents for order questions and checkout recovery.E-commerce
Svixsvix.comSvix provides a webhook API and related products for sending, receiving, and testing webhooks.Developer tools
WorkOSworkos.comWorkOS provides building blocks for adding enterprise features such as single sign-on, user management, and directory sync to an app.CybersecurityDeveloper tools
AccessOwlaccessowl.ioAccessOwl is an access governance tool that automates SaaS access management, including onboarding, offboarding, access reviews, access requests, shadow IT discovery, and spend tracking.Identity and access
Dibsidodibsido.comDibsido is a workplace booking app for reserving desks, parking spots, and meeting rooms.
Finsifinsi.aiFinsi provides AI agents that work from a single data warehouse with shared metric definitions, and lets teams connect their own agents over MCP or API.AI and machine learningE-commerce
ListPluslistplus.aiListPlus helps CRM teams, RevOps and GTM engineers find B2B leads and check and enrich contact data.Sales
OneDirectoryonedirectory.comOneDirectory provides an employee directory for Microsoft 365 that lets people search coworkers by role, skill, team or location and includes profiles and an org chart.Productivity and collaboration

The two technologies

Close

CRM and sales

Close is a sales CRM that combines calling, email, SMS, pipeline management, reporting, and an AI sales agent named Chloe in one platform. It is used by sales teams to act on their sales data and manage their pipeline.

Summarized from close.com on 8 Nov 2026.

60% of the 20 companies we see using Close also show the other.

All 20 companies using Close11 name it as a subprocessorMore in CRM and sales

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.

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

Industries

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

E-commerce4AI and machine learning2Developer tools2Identity and access2

Other pairs

Companies with their own evidence for both.

More with Close

Cloudflare20companiesGoogle Workspace19companiesAmazon Web Services16companiesStripe16companiesGoogle Tag Manager11companiesGoogle Analytics10companies

More with Slack

Cloudflare1,809companiesGoogle Workspace1,576companiesAmazon Web Services1,295companiesStripe893companiesGoogle Tag Manager880companiesGoogle809companies

Questions

How many companies use both Close and Slack?

12 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 Close and Slack?

Clerk.io, Countfire, FareHarbor, Funnelytics and Zoko, and 7 more companies. Each one links to the evidence behind it.

How does StrataDB know a company uses Close 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 Close 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