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team communication software · Tool Face-Off

Slack vs Microsoft Teams

Quick answer

Slack wins on polish and integrations; Teams wins on value if you're already in Microsoft 365. Your existing stack is the real tiebreaker.

Our pick
Slack
Where work flows (and GIF wars happen)
4.2★
VS
Microsoft Teams
The Swiss Army knife bolted to your Office subscription
3.8★
Free Plan
Yes – 90-day message history, 10 integrations
Yes – unlimited messages, 5 GB storage
Paid Pricing (per seat/mo)
~$7.25 (Pro), ~$12.50 (Business+)
~$6 (Essentials) – included in M365 plans
Message History (free)
90 days
Unlimited
Native Video Calls
Up to 50 participants (paid)
Up to 1,000 participants
Third-party Integrations
2,600+ apps in marketplace
~700 apps
Microsoft 365 Integration
Basic (via connector)
Seamless – Teams, SharePoint, OneDrive native
Workflow Automation
Workflow Builder – no-code automations built-in
Power Automate – powerful but complex
Search Quality
Fast, accurate, filters by person/date/channel
Functional but slower and less precise
Channel/Thread Organization
Channels + threaded replies, clean UX
Teams > Channels > Tabs structure, steeper learning curve
Storage (paid)
No file storage limit (via integrations)
1 TB+ per user via OneDrive
Screen Sharing
Yes, all paid plans
Yes, free and paid
Offline Access
Limited – read-only cache
Better offline support via desktop app

Slack

Pricing★★★☆☆
Support★★★½☆
Features★★★★½
Ease of Use★★★★½
Integrations★★★★★
Mobile Experience★★★★½

Microsoft Teams

Pricing★★★★½
Support★★★★☆
Features★★★★½
Ease of Use★★★☆☆
Integrations★★★½☆
Mobile Experience★★★½☆

Worth knowing

Microsoft Teams once had a bug that would mark you as 'Away' during a video call — so you could simultaneously be in a meeting and look like you'd abandoned your desk. Peak corporate energy.

If you want

You want the slickest UX and best third-party integrations

Slack's interface is faster, cleaner, and connects to almost everything without fighting your IT department.

→ Pick Slack
If you want

Your company already pays for Microsoft 365

Teams is essentially free in that bundle — paying extra for Slack is a hard sell to your CFO.

→ Pick Microsoft Teams
If you want

You need large-scale video meetings built in

Teams supports up to 1,000 participants natively; Slack's calling features feel like an afterthought by comparison.

→ Pick Microsoft Teams
If you want

You're a small startup or dev team moving fast

Slack's Workflow Builder, Huddles, and app ecosystem are purpose-built for scrappy, async-heavy teams.

→ Pick Slack
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