Slack vs. Microsoft Teams: A Head-to-Head Comparison
Choosing the right workplace messaging platform can dramatically affect how your team collaborates. Slack and Microsoft Teams are the two dominant players in the space — but they serve slightly different audiences and workflows. Here's what you need to know before committing to either.
Quick Overview
| Feature | Slack | Microsoft Teams |
|---|---|---|
| Free Plan | Yes (limited history) | Yes (with Microsoft account) |
| Video Calls | Yes (Huddles + integrations) | Yes (built-in, robust) |
| File Storage | 5 GB (free), more on paid | 10 GB+ (via SharePoint) |
| Third-Party Integrations | 2,600+ apps | 700+ apps |
| Best For | Startups, tech teams | Enterprise, Microsoft 365 users |
Messaging & Channels
Slack pioneered the concept of organized channels, and it still does them best. Channels are intuitive to create, archive, and search. Threads keep conversations tidy without losing context. Slack's search functionality is particularly powerful on paid plans where full message history is available.
Microsoft Teams also uses channels, but organizes them within "Teams" (groups), which can feel hierarchical and harder to navigate for new users. That said, Teams integrates deeply with SharePoint, OneNote, and the broader Microsoft 365 ecosystem — a major advantage for organizations already embedded in that world.
Video & Voice Calls
Microsoft Teams has a clear edge in video conferencing. It was built with enterprise meetings in mind and supports large video calls, breakout rooms, live captions, and meeting recordings natively. Slack's "Huddles" feature is excellent for quick audio/video drop-ins but isn't designed for large formal meetings.
Integrations & Ecosystem
Slack wins on third-party app integrations. With thousands of apps in its App Directory — including Salesforce, GitHub, Jira, and Google Workspace — it's a flexible hub for diverse tech stacks. Microsoft Teams is more powerful if your company lives inside Microsoft 365, offering seamless connections to Word, Excel, Outlook, and SharePoint.
Pricing
- Slack Free: 90-day message history, 10 app integrations, 1:1 audio/video calls
- Slack Pro: Full history, unlimited integrations, group calls
- Teams Free: Unlimited messages, 60-min meeting limit, 5 GB storage
- Teams Essentials / Microsoft 365 plans: Extended features bundled with Office apps
Which Should You Choose?
Choose Slack if: Your team uses a variety of tools, values a clean interface, and prioritizes fast, informal communication with powerful search.
Choose Microsoft Teams if: Your organization is already on Microsoft 365, needs robust video conferencing, or requires enterprise compliance features.
Both platforms offer free tiers, so the best approach is to trial each with a small team before rolling out company-wide.