Choosing between Slack and Microsoft Teams is one of the biggest decisions a team can make. Both platforms dominate workplace communication in 2026, but they take very different approaches. Here’s our honest, detailed comparison to help you decide.
Quick Verdict
Choose Slack if your team relies on a diverse set of third-party integrations, values a polished chat experience, and wants the best notification management in the business.
Choose Microsoft Teams if your organization already uses Microsoft 365, needs built-in video conferencing, and wants to save money on an all-in-one solution.
Pricing Comparison
| Plan | Slack | Microsoft Teams |
|---|---|---|
| Free | ✅ (90-day message history, 10 integrations) | ✅ (100 participants, 5 GB storage) |
| Pro / Essentials | $7.25/user/mo | $4/user/mo |
| Business+ / Basic | $12.50/user/mo | $6/user/mo |
| Enterprise / Standard | Custom pricing | $12.50/user/mo |
At first glance, Microsoft Teams is significantly cheaper — especially at the lower tiers. The Essentials plan at $4/user/month undercuts Slack’s Pro at $7.25. However, pricing alone doesn’t tell the whole story.
If your company already pays for Microsoft 365 Business Basic ($6/user/mo) or higher, Teams is included at no extra cost. That’s a massive advantage for organizations already in the Microsoft ecosystem.
Messaging & Chat Experience
Slack
Slack pioneered the modern channel-based messaging experience, and it still feels more refined. Threads are clean and intuitive. The emoji reaction system is deeply ingrained in workplace culture. Slack Connect lets you communicate with external partners seamlessly.
Key strengths:
- Threaded conversations that don’t clutter the main channel
- Custom emoji and workflows for team culture
- Slack Connect for cross-organization collaboration
- Huddles for quick audio/video chats
Microsoft Teams
Teams has improved dramatically over the past few years. The chat experience is solid, though some users still find it slightly less intuitive than Slack. Where Teams shines is in combining chat with the full Microsoft 365 suite — you can co-edit a Word document without leaving the app.
Key strengths:
- Tight integration with Word, Excel, PowerPoint, OneNote
- Loop components for collaborative content blocks
- Copilot AI built directly into conversations
- Channels and teams structure for large organizations
Winner: Slack for pure messaging experience. Teams wins if you need document collaboration alongside chat.
Video Conferencing
This is where Teams pulls ahead significantly. Microsoft Teams offers robust video conferencing with up to 300 participants on paid plans, breakout rooms, live captions, recording, and webinar capabilities — all built in.
Slack added Huddles (lightweight audio/video calls), but for formal meetings, you’ll likely still need a third-party tool like Zoom or Google Meet. That’s an additional cost and context switch.
| Feature | Slack | Microsoft Teams |
|---|---|---|
| Built-in video calls | Huddles (lightweight) | Full-featured meetings |
| Max participants | 50 (Huddles) | 300 (paid plans) |
| Screen sharing | ✅ | ✅ |
| Recording | ❌ | ✅ |
| Breakout rooms | ❌ | ✅ |
| Live captions | ❌ | ✅ |
Winner: Microsoft Teams — not even close for video conferencing.
Integrations & App Ecosystem
Slack has over 2,600 integrations in its App Directory, and the quality of those integrations is generally excellent. Tools like Jira, GitHub, Figma, and Salesforce have first-class Slack apps.
Teams has grown its integration ecosystem significantly, with over 1,800 apps available. The integrations work well, especially with other Microsoft products, but third-party app quality can be inconsistent.
If your workflow depends heavily on non-Microsoft tools, Slack’s integration ecosystem is still superior. If you’re choosing a project management tool to pair with your communication platform, both Slack and Teams integrate with the major players.
Winner: Slack for breadth and quality of third-party integrations.
AI Features
Both platforms have invested heavily in AI for 2026:
- Slack AI ($10/user/mo add-on): Channel recaps, thread summaries, intelligent search across all messages and files
- Teams Copilot (included in Microsoft 365 Copilot at $30/user/mo): Meeting summaries, action item extraction, message drafting, document insights
Slack’s AI is more affordable as a standalone add-on. Teams Copilot is more powerful but requires the broader Microsoft 365 Copilot subscription. For tips on evaluating AI features, check our guide on how to choose the right AI tool.
Winner: Tie — depends on your budget and existing subscriptions.
File Sharing & Storage
| Feature | Slack (Pro) | Teams (Business Basic) |
|---|---|---|
| Storage per user | 10 GB | 1 TB (OneDrive) |
| File sharing | ✅ | ✅ |
| Co-editing | ❌ (links to external tools) | ✅ (real-time in-app) |
| Version history | Limited | Full (via SharePoint) |
Teams offers dramatically more storage and true co-editing capabilities. If your team shares and collaborates on documents frequently, this is a major advantage.
Winner: Microsoft Teams for file management and storage.
Security & Compliance
Both platforms offer enterprise-grade security including:
- End-to-end encryption (in transit and at rest)
- SOC 2, ISO 27001, GDPR compliance
- Data loss prevention (DLP) policies
- eDiscovery and retention policies
Teams has a slight edge for highly regulated industries because it integrates with Microsoft Purview for advanced compliance, information barriers, and sensitivity labels. Slack’s Enterprise Grid also offers robust compliance features but at a higher price point.
Winner: Microsoft Teams by a slim margin for enterprise compliance.
User Experience & Learning Curve
Slack is widely considered more intuitive and enjoyable to use. The interface is clean, search is fast, and keyboard shortcuts make power users extremely productive. New team members typically get comfortable within hours.
Teams can feel overwhelming at first. The interface packs a lot of functionality — chat, meetings, files, apps, calendar — and navigating between them takes time. However, once you’re familiar, having everything in one place is powerful.
Winner: Slack for user experience and onboarding speed.
Who Should Choose What?
Choose Microsoft Teams if:
- Your organization uses Microsoft 365
- Video conferencing is a daily need
- You want maximum value from existing Microsoft licenses
- Compliance requirements are stringent
- Budget is a primary concern
Choose Slack if:
- You use a diverse set of non-Microsoft tools
- Chat is your primary communication mode
- You value a polished, intuitive UX
- You work with external partners frequently
- Your team culture thrives on customization (emoji, workflows)
Our Recommendation
For most teams already invested in Microsoft 365, Teams is the practical choice — you’re likely already paying for it, and the integrated video conferencing alone justifies the switch.
For everyone else — startups, agencies, tech teams, and organizations using Google Workspace — Slack remains the gold standard for team messaging. The superior UX, better integrations, and Slack Connect make it worth the premium.
Whichever you choose, pair it with the right project management tool to keep your team organized beyond just chat.
Need help comparing other tools? Check out our Asana vs Monday comparison or browse our full collection of tool comparisons to find the perfect stack for your team.