# Companies Using Slack

> 28,800+ companies with confirmed Slack installations — organizations that have adopted real-time team messaging as their primary internal communication layer.

**Source:** https://gtm.ai/marketplace/companies-using-slack

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## Overview

Slack has become the default communication layer for tech-forward companies — and with that comes an entire ecosystem of bots, integrations, and workflow tools built on top of it. Companies running Slack are signal-rich buyers for productivity, automation, and employee experience tools that plug into their existing messaging infrastructure.

## What's Included

Confirmed Slack installation data and company firmographics. The audience is concentrated among technology, media, and knowledge-work companies that have standardized on Slack as their primary asynchronous and real-time communication tool.

## Use Cases

- **Slack app and workflow automation vendors** prospecting their addressable Slack-native market
- **Employee experience and HR tools** selling to companies using Slack as an engagement layer
- **Microsoft Teams vendors** building displacement campaigns against Slack-standard organizations