Market share · Last verified Nov 6, 2026
Team communication market share Across 1.7M+ companies.
Across the 1.7M+ company installs we see in Team communication, Microsoft Teams leads with 72.3%, followed by Slack at 22.7%. Shares count companies, not revenue.
1.7M+Company installs in Team communication
72.3%Microsoft Teams share
4Vendors compared
Share
Share of companies.
Switching
Who moves to whom.
Companies that stopped using one vendor and started using another since Nov 6, 2025. Darker cells mean more switches.
From ↓ · To →Microsoft TeamsSlackZoomWebexMicrosoft Teams—n/an/an/aSlack0—10Zoom00—0Webex20717—
n/a: we don't see drops for Microsoft Teams yet, so moves away from it aren't counted. Moves to it are.
By company size
Share by company size.
51–200 staff
201–500 staff
501–1,000 staff
1,001–5,000 staff
5,001–10,000 staff
10,001+ staff
How we count
Every signal behind the numbers.
MX recordsDomain names
Microsoft 365 behind MimecastShows adoptionDomain names 9
Subdomains and tenants 7
Certificates 4
Website and app 12
Hiring 8
People 6
Company news 7
Vendors and partners 7
Public records 6
Code and infrastructure 8
Incumbent events 4
Questions
Team communication market share, answered.
Microsoft Teams, with 72.3% of the 1.7M+ company installs we see in Team communication. Slack is second at 22.7%.
By the number of companies where we see each tool in use, not by revenue or seats. A company that uses two of these tools counts for both.
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