Microsoft Teams vs Slack: Complete Comparison 2026
An in-depth comparison of features, pricing, and user experience to help you make the right choice.
Microsoft Teams
8.4(42,800 reviews)
Unified communication platform combining video meetings, chat, file sharing, and Microsoft 365 integration for workplace collaboration.
Slack
Channel-based messaging app for teams, with threads, huddles, app integrations and searchable history.
Quick Comparison
| Aspect | Microsoft Teams | Slack |
|---|---|---|
| Best For | Organizations already invested in the Microsoft 365 ecosystem | Startups and tech teams that run on many SaaS tools |
| Pricing Model | Freemium | Freemium |
| Starting Price | Free | Free |
| Deployment | cloud | cloud |
| Platforms | WEB, IOS, ANDROID, WINDOWS, MAC, LINUX | WEB, WINDOWS, MAC, LINUX, IOS, ANDROID |
| Rating | 8.4/10 | 9.0/10 |
Pros & Cons
Microsoft Teams
Pros
- Included with Microsoft 365 — no extra cost if you already pay for Office apps
- Deepest Office integration: co-author Word docs, edit Excel, present PowerPoint live in meetings
- Persistent channels keep conversations organized by project, team, or topic long-term
- Copilot AI generates meeting notes, action items, and catches you up on missed discussions
- Teams Rooms hardware ecosystem is the largest, with 30+ certified device partners
Cons
- Heavy RAM usage — regularly consumes 800MB-1.2GB, sluggish on machines with 8GB RAM
- Steep learning curve for new users navigating channels, chats, tabs, and meeting types
- Notification overload by default; most users spend the first week tuning settings
- File management confusion when documents scatter across Teams, SharePoint, and OneDrive
- Meeting join time is 3-5 seconds slower than Zoom, which adds up across dozens of daily calls
Slack
Pros
- Best-in-class app directory with 2,600+ integrations
- Search is fast and accurate across years of history
- Channels and threads keep conversations organized and scannable
- Workflow Builder enables no-code automation without IT
- Polished desktop and mobile apps that feel fast
Cons
- Free plan limited to 90 days of message history
- Per-user pricing gets expensive for large teams
- Always-on notification culture can hurt deep focus
- Microsoft Teams comes bundled free with Microsoft 365
- No built-in document or project management depth
Pricing Comparison
| Product | Pricing Model | Starting Price |
|---|---|---|
| Microsoft Teams | freemium | Free0 |
| Slack | freemium | Free0 |
Our Verdict
Choose Microsoft Teams if...
Organizations already invested in the Microsoft 365 ecosystem
Choose Slack if...
Startups and tech teams that run on many SaaS tools
Still Not Sure?
Explore more alternatives or read in-depth reviews to make your decision.