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Team Messaging / Chat · Head to head

Microsoft Teams vs Slack

Both products compete in Team Messaging / Chat. Team messaging and chat software provides persistent channels, direct messages, and threaded conversations for internal communication. Organizations use it as the primary real-time coordination layer across functions and time zones, often with integrations to project management, CI/CD pipelines, and other tooling. Here are the facts the B4 Index maintains on each, side by side.

The two files, side by side

Microsoft Teams
Slack
What it is
Dominant in enterprise, bundled with productivity
Boost productivity and save time with Slack‌ — ‌the AI work platform for managing projects, automating workflows, and connecting teams securely. Start working smarter today.
Website
teams.microsoft.com ↗
slack.com ↗
Pricing
Included with M365
$7-13/user/month
Categories served
Unified Communications (UCaaS), Video Conferencing, Team Messaging / Chat
Team Messaging / Chat
Status
Active
Active
The Microsoft Teams file → The Slack file →

The decision underneath the comparison

Choosing between Microsoft Teams and Slack assumes you're buying Team Messaging / Chat at all. That's the prior question, and the B4 Index scores it on two axes: how much Team Messaging / Chat differentiates you, and how far AI has come at building it. Read the build-versus-buy considerations for Team Messaging / Chat before you shortlist either product.

Vendor facts are maintained independently of any B4 verdict and re-verified on a monthly liveness check. See the full methodology.