---
title: "Microsoft Teams vs Slack: who uses which, and who's switching (2026)"
description: "Microsoft Teams vs Slack by real usage: 1.2M+ companies use Microsoft Teams and 390K+ use Slack."
url: https://www.incumbently.com/compare/microsoft-teams-vs-slack
---

Head to head · Last verified Nov 6, 2026

# Microsoft Teams vs Slack Who uses which, and who's switching.

We see 1.2M+ companies using Microsoft Teams and 390K+ using Slack. In the last 12 months, 12K+ started on Microsoft Teams and 1,800+ on Slack. 0 moved from Microsoft Teams to Slack, and 0 the other way.

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1.2M+ Companies using Microsoft Teams

390K+ Companies using Slack

Switched between them

Over time

## New customers, month by month.

Microsoft Teams Dec 2025 – Oct 2026

Slack Dec 2025 – Oct 2026

Switching

## Who moves which way.

Companies that stopped using one and started using the other since Nov 6, 2025.

Microsoft Teams → Slack **0** companies Slack → Microsoft Teams **0** companies

Microsoft Teams

## By company size.

1 employee staff 2%

2–10 staff 56%

11–50 staff 21%

51–200 staff 11%

201–500 staff 5%

501–1,000 staff 2%

1,001–5,000 staff 2%

Slack

## By company size.

2–10 staff 14%

11–50 staff 17%

51–200 staff 32%

201–500 staff 16%

501–1,000 staff 8%

1,001–5,000 staff 8%

5,001–10,000 staff 2%

10,001+ staff 3%

Microsoft Teams

## Top industries.

Construction 3%

IT Services and IT Consulting 3%

Retail 2%

Business Consulting and Services 2%

Financial Services 2%

Slack

## Top industries.

IT Services and IT Consulting 5%

Software Development 5%

Financial Services 3%

Hospitals and Health Care 3%

Advertising Services 2%

Questions

## Microsoft Teams vs Slack, answered.

Microsoft Teams is used by more of the companies we see: 1.2M+ against 390K+.

In the last 12 months, 12K+ companies started using Microsoft Teams and 1,800+ started using Slack.

Since Nov 6, 2025, 0 moved from Microsoft Teams to Slack and 0 moved from Slack to Microsoft Teams.

More on Microsoft Teams

[Companies using Microsoft Teams**1.2M+** ](https://www.incumbently.com/companies-using/microsoft-teams)[Microsoft Teams vs Zoom](https://www.incumbently.com/compare/microsoft-teams-vs-zoom)[Webex to Microsoft Teams**20** ](https://www.incumbently.com/switching/webex-to-microsoft-teams)[Microsoft Teams vs Webex](https://www.incumbently.com/compare/microsoft-teams-vs-webex)[Team communication market share](https://www.incumbently.com/market-share/team-communication)

More on Slack

[Companies using Slack**390K+** ](https://www.incumbently.com/companies-using/slack)[Companies leaving Slack**0** ](https://www.incumbently.com/leaving/slack)[Slack to Zoom**1** ](https://www.incumbently.com/switching/slack-to-zoom)[Slack vs Zoom](https://www.incumbently.com/compare/slack-vs-zoom)[Webex to Slack**7** ](https://www.incumbently.com/switching/webex-to-slack)[Slack vs Webex](https://www.incumbently.com/compare/slack-vs-webex)[Team communication market share](https://www.incumbently.com/market-share/team-communication)

[Compare Every tool comparison ](https://www.incumbently.com/compare)[Market share Team communication market share ](https://www.incumbently.com/market-share/team-communication)Related

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