Slack vs Microsoft Teams 2026: Team Communication Compared
By Itai Varochik | Updated February 18, 2026 | 3 min read
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Overview
Slack and Microsoft Teams are the two dominant platforms for workplace communication, collectively serving over 500 million users. Slack pioneered the modern team messaging experience, while Teams leverages Microsoft's enterprise ecosystem to bundle communication with Office 365 productivity tools.
Since Salesforce acquired Slack in 2021, the platform has deepened its integration with the Salesforce ecosystem. Teams, meanwhile, has become the default communication tool for organizations already invested in Microsoft 365.
Feature comparison
- Messaging: Slack's threaded conversations are more intuitive. Teams offers richer formatting but conversations can become cluttered in busy channels.
- Video/Audio: Teams includes full-featured meetings with up to 1,000 participants. Slack Huddles are lightweight but limited to 50 participants.
- Integrations: Slack has 2,600+ integrations with a developer-friendly API. Teams integrates deeply with Microsoft 365 apps (Word, Excel, SharePoint).
- File Sharing: Teams uses SharePoint/OneDrive natively. Slack integrates with Google Drive, Dropbox, and Box.
- AI Features: Teams offers Copilot (meeting summaries, drafts). Slack AI provides search summaries and channel recaps.
Pricing comparison
Slack:
- Free: 90-day message history, 10 integrations
- Pro: $7.25/user/mo
- Business+: $12.50/user/mo
- Enterprise Grid: custom pricing
Microsoft Teams:
- Free: 100 participants, 5GB storage
- Essentials: $4/user/mo
- Business Basic: $6/user/mo (with Microsoft 365 web apps)
- Business Standard: $12.50/user/mo (with desktop Office apps)
Teams offers better value for organizations already using Microsoft 365, as it is included in most business subscriptions at no additional cost.
Winner by category
- Best for Messaging: Slack (superior threading and channel organization)
- Best for Video Meetings: Microsoft Teams (full-featured meetings, larger capacity)
- Best for Microsoft Shops: Microsoft Teams (native Office 365 integration)
- Best for Developers: Slack (richer API, more third-party integrations)
- Best for Value: Microsoft Teams (included with Microsoft 365 subscriptions)
Final verdict
Choose Slack if your team values a clean messaging experience, uses diverse third-party tools, or works in a tech-forward environment where integrations matter most.
Choose Microsoft Teams if your organization is invested in the Microsoft 365 ecosystem, needs robust video conferencing, or wants to minimize per-tool costs by bundling communication with productivity software.
Frequently Asked Questions
Is Slack or Teams better?
Slack is better for messaging and third-party integrations. Teams is better for video meetings and Microsoft 365 users. The best choice depends on your existing tool ecosystem.
Is Microsoft Teams free?
Yes, Microsoft Teams offers a free tier with 100-participant meetings, 5GB storage, and unlimited messaging. Paid plans start at $4 per user per month.
Can Slack and Teams work together?
Yes, there are third-party bridges that connect Slack and Teams channels. However, running both platforms simultaneously is common in organizations during transitions or cross-company collaborations.
Which has better security?
Both platforms offer enterprise-grade security with encryption, compliance certifications, and admin controls. Teams benefits from Microsoft's broader security ecosystem; Slack offers Enterprise Key Management for advanced encryption control.