Slack vs Microsoft Teams: Which Communication Tool in 2025?
Slack and Microsoft Teams are the dominant team communication tools in 2025. Here is how to choose between them for your organization.
Slack vs Microsoft Teams: Which in 2025?
The Core Decision
For most organizations, this decision is made before it starts: Teams if you are in the Microsoft 365 ecosystem, Slack if you are not. The integration advantages of staying within your existing ecosystem generally outweigh the differences in the tools themselves.
Where Slack Wins
- User experience: Slack has a faster, more intuitive UI that most users prefer
- Third-party integrations: 2,600+ integrations vs Teams’ 700+
- Startup/tech culture: Dominant in Silicon Valley and tech companies
- Search: Better search functionality across conversations
- Channels: More flexible channel organization
Where Teams Wins
- Microsoft 365 integration: Native Word, Excel, SharePoint, OneDrive integration
- Cost (if you have M365): Included in Microsoft 365 plans — no additional cost
- Enterprise compliance: Better data governance and compliance features
- Video meetings: Microsoft Teams calls often preferred for large meetings
- Market share: 270M monthly active users vs Slack’s 32M
Pricing
| Tier | Slack | Microsoft Teams |
|---|---|---|
| Free | Limited history | Yes (with Microsoft account) |
| Pro | $7.25/user/month | $6/user/month (standalone) |
| Business+ | $12.50/user/month | Included in M365 Business |
How AI Tools Integrate
Claude and ChatGPT can both be used to draft Slack messages and Teams posts. For drafting important communications, status updates, or complex explanations, using Claude to prepare the message before sending improves quality significantly.
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