software
Slack vs Microsoft Teams 2026: Full Comparison
Microsoft Teams is free with Office 365 and integrates deeply with the Microsoft ecosystem, while Slack offers superior user experience and third-party app integration with 2,400+ available apps versus Teams' 1,000+. Teams dominates enterprise adoption with 320+ million monthly active users compared to Slack's 750,000 paid customers.
S
Slack
Cloud-based team communication platform with focus on messaging, channels, and integrations.
Tech startups, creative agencies, and companies deeply integrated with non-Microsoft tools who prioritize superior UX and don't have existing Microsoft 365 subscriptions.
Score71%
VS
Microsoft Teams
Enterprise collaboration platform integrated with Microsoft 365, combining chat, video calls, and document collaboration.
Enterprise organizations with Microsoft 365 deployments, regulated industries requiring advanced compliance, and teams that rely heavily on Office document collaboration.
Score71%
Quick Answer
AI SummaryMicrosoft Teams is free with Office 365 and integrates deeply with the Microsoft ecosystem, while Slack offers superior user experience and third-party app integration with 2,400+ available apps versus Teams' 1,000+. Teams dominates enterprise adoption with 320+ million monthly active users compared to Slack's 750,000 paid customers.
Our Verdict
AI-assistedChoose Microsoft Teams if you're an Office 365 subscriber, need enterprise-grade security, work in a Microsoft-centric organization, or require the largest participant video calls—Teams integrates seamlessly with Word, Excel, SharePoint, and Outlook, with zero additional cost for most businesses. Choose Slack if you prioritize user experience, need extensive third-party integrations, prefer a best-in-class interface, or work in a tech-forward company that values flexibility—Slack excels for teams that aren't locked into the Microsoft ecosystem and demand a more intuitive communication platform.
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S
Slack
6.9/10
vs
Microsoft Teams
8.1/10
S
Choose Slack if
Tech startups, creative agencies, and companies deeply integrated with non-Microsoft tools who prioritize superior UX and don't have existing Microsoft 365 subscriptions.
★
Choose Microsoft Teams if
Best pickEnterprise organizations with Microsoft 365 deployments, regulated industries requiring advanced compliance, and teams that rely heavily on Office document collaboration.
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Key Differences at a Glance
- Monthly Active Users:✓ Microsoft Teams wins(320+ million monthly active users vs 750,000 paid customers)
- Available Third-Party Apps:✓ Slack wins(2,400+ integrations vs 1,000+ integrations)
- Standalone Pricing (Pro Plan):✓ Microsoft Teams wins($6.50/user/month or free with Microsoft 365 vs $8.75/user/month (billed annually))
Key Facts & Figures
104 numeric metrics compared
| Metric | Slack | Microsoft Teams | Ratio |
|---|---|---|---|
| Daily Active Users(millions) | ~38 Million | 320 million | -88% |
| App Integrations(count) | 2,600+ | ~700 | +271% |
| Paid Starting Price(USD/user/mo) | $7.25 | Included with M365 | |
| Standalone Monthly Pricing (Pro Tier)(USD per user per month) | $7.25 | $6.00 (with Microsoft 365 Business Basic) | +21% |
| Annual Cost per User (Pro Tier)(USD) | $87 (billed yearly) | $72 (bundled pricing) | +21% |
| Third-Party App Integrations(integrations) | 2,400+ | 1,000+ | +140% |
| Video Meeting Capacity(participants) | Up to 2,000 (with paid plan) | Up to 10,000 | -80% |
| Mobile App Feature Parity(%) | 95% | 85% | +12% |
| Base Monthly Cost Per User(USD) | $8 | — | — |
| Free Tier Meeting Participant Limit(participants) | Unlimited (Slack Huddles for video limited to 50 participants) | — | — |
| Asynchronous Communication Strength(scale 1-5) | 5 out of 5 (core feature with channels, threads, and history) | — | — |
| Google Workspace Integration Level | 2 out of 5 (available via integration, not native) | — | — |
| AI Features Count (2026)(features) | 30+ (CRM tools, meeting summaries, automation, SlackBot enhancements) | — | — |
| Base Monthly Cost Per User(USD) | $7.25 | — | — |
| Business+ Tier Monthly Cost Per User(USD) | $12.50 | — | — |
| Available Integrations(integrations) | 2000+ | — | — |
| Price Stability (2024-2026)(months) | No increases for 33 months | — | — |
| Free Tier Cost(USD) | Free | — | — |
| Pro/Standard Monthly Cost(USD per user/month) | $7.25 | — | — |
| Third-party Integrations(integrations) | 2000+ | — | — |
| Minimum Monthly Cost Per User(USD) | $7.25 | — | — |
| Third-Party Integrations Available(count) | 2,000+ | — | — |
| Years Price Stable (2026)(months) | 33+ months | — | — |
| Native Integrations Available(count) | 2,200+ | — | — |
| Pro Plan Annual Cost(USD) | $150 (billed monthly) | — | — |
| Free Tier Message History Retention(days) | 90 days | — | — |
| AI Transcription Languages Supported(languages) | 0 (not native feature) | — | — |
| Enterprise Uptime SLA(percent) | 99.99% | — | — |
| User Workspace Limit (Free Tier)(workspaces) | 1 workspace | — | — |
| Maximum Meeting Participants (Free)(participants) | 3 participants | — | — |
| Pro Plan Monthly Cost (Annual Billing)(USD per user) | $8.75 | — | — |
| Available Integrations(count) | 2,000+ integrations | — | — |
| Monthly Cost (Pro Plan)(USD) | $12.50 per user/month | — | — |
| Free Message History(days) | 90 days maximum | — | — |
| Voice Audio Codec Quality(kHz) | 16 kHz | — | — |
| Third-Party Integrations(integrations) | 2000+ | 500+ | +300% |
| Maximum Video Call Participants(people) | 15 participants | — | — |
| Total Registered Users(millions) | 750 million | — | — |
| Enterprise Plan Monthly Cost Per User(USD) | $12.50 | — | — |
| Free Plan Message History Retention(days) | 90 days | — | — |
| Third-Party Integrations Available(integrations) | 2,300+ integrations | — | — |
| Paid Plan Starting Price(USD/user/month) | $7.25 | $6 | +21% |
| Cloud Storage (Base Plan)(GB) | 10 GB | — | — |
| Monthly Cost Per User(USD) | $8-12.50 (Pro/Business+) | — | — |
| Active Workspaces(workspaces) | 750,000+ | — | — |
| Native Integrations(integrations) | 2,300+ | — | — |
| Message History Searchable(years) | 10 years standard | — | — |
| Workflow Automation Steps(built-in steps) | 50+ | — | — |
| Native App Integrations Available(count) | 2,400+ apps | — | — |
| Monthly Cost (Pro Plan, 50 users)(USD) | $412.50/month | — | — |
| Message History Retention (Free Plan)(days) | 90 days (10,000 message limit) | — | — |
| Paid Workspaces/Users (Enterprise Adoption)(workspaces) | 750,000+ paid workspaces | — | — |
| Monthly Cost (10 Users, Annual)(USD) | $150/month ($1,800/year) | — | — |
| Pre-built Integrations(count) | 2,400+ integrations | — | — |
| Message History on Free Plan(days) | 90-day limited access | — | — |
| Active Global Workspaces/Deployments(count) | 750,000+ active workspaces | — | — |
| Uptime SLA Guarantee(%) | 99.99% | — | — |
| Price Per User Per Month (Pro/Standard)(USD) | $12.50/user (Pro plan) | — | — |
| Base Monthly Cost (10-person team)(USD) | $80-150 | — | — |
| Cost for 50-person team(USD/month) | $400-750 | — | — |
| Real-time Messaging Speed(ms (message delivery latency)) | 50-100ms (instant) | — | — |
| File Storage Included(GB) | 5GB (free); unlimited (paid plan) | — | — |
| Setup Time for New Team(hours) | 0.5-1 hour | — | — |
| Max Video Conference Participants(people) | 1000 | 10000 | -90% |
| Message History (Free Plan)(days) | 90 | unlimited | — |
| Voice Codec Quality Rating(score (1-10)) | 7.5 | 8 | -6% |
| Enterprise Security Certifications(count) | SOC 2, HIPAA, FedRAMP, GDPR | SOC 2, HIPAA, FedRAMP, GDPR, DLP, eDiscovery | -33% |
| Time to Deploy(days) | 3-7 | 1-3 | +150% |
| Uptime Guarantee(%) | 99.99% | 99.9% | |
| Pro Plan Monthly Cost(USD per user) | $8.75 | $6.50 or free with Microsoft 365 | +35% |
| Video Conference Max Participants(participants) | 150 | 300 | -50% |
| Free Tier File Storage(GB per user) | 1 GB shared workspace | 100 GB per user | -99% |
| Message Search History (Free Tier)(days) | 90 days | 90 days | |
| Annual Subscription Cost (Pro, 100 users)(USD) | $10,500 | $7,800 or free with Microsoft 365 | +35% |
| Desktop App Memory Usage(MB) | 280 MB | 450 MB | -38% |
| Maximum Webinar Participants(participants) | 10,000 | 10,000 | |
| Free Meeting Duration Limit(minutes) | 60 minutes | 60 minutes | |
| Maximum Free Breakout Rooms(rooms) | 50 rooms | 50 rooms | |
| Starting Paid Plan Cost(USD/month) | $6/month (Microsoft 365 bundle) | $6/month (Microsoft 365 bundle) | |
| Free Plan Monthly Cost(USD) | $6 (Teams Essentials) | $6 (Teams Essentials) | |
| Maximum Free Tier Group Meeting Duration(hours) | 24 hours | 24 hours | |
| Free Tier Participant Limit(participants) | 100 participants | 100 participants | |
| Gartner Meeting Solutions Rating(stars) | 4.5 stars | 4.5 stars | |
| Gartner Review Sample Size(reviews) | 3,669 reviews | 3,669 reviews | |
| Gartner Customer Rating(stars) | 4.5 stars | 4.5 stars | |
| Customer Reviews Analyzed(count) | 3,668 reviews | 3,668 reviews | |
| Video Quality Rating(%) | 7.9% positive | 7.9% positive | |
| Maximum Meeting Participants(participants) | 1,000+ participants | 1,000+ participants | |
| Starting Monthly Price per User(USD) | $4.50 | $4.50 | |
| Free Meeting Duration (3+ participants)(minutes) | 60 minutes | 60 minutes | |
| Real-Time Translation Languages(count) | 31 languages | 31 languages | |
| Enterprise Deployment Adoption (500+ seat orgs)(percentage) | 67% of deployments | 67% of deployments | |
| 3-Year TCO Advantage for 1,000 Users with M365(percentage savings) | 47% lower cost | 47% lower cost | |
| Base Pricing (Monthly)(USD) | $7.00 (Business Basic 2026 price) | $7.00 (Business Basic 2026 price) | |
| Maximum Video Meeting Participants(participants) | 300+ participants | 300+ participants | |
| Language Translation Support(languages) | 40+ languages (Teams Premium) | 40+ languages (Teams Premium) | |
| Registered Users Globally(millions) | 350+ million monthly active users | 350+ million monthly active users | |
| Monthly Active Users (MAU)(millions) | 320M | 320M | |
| Free Plan Meeting Duration Limit(minutes) | 60 minutes (group calls) | 60 minutes (group calls) | |
| Minimum Bandwidth for HD Video(Mbps) | 4.5 Mbps | 4.5 Mbps | |
| Monthly Active Users (2024)(millions) | 320 million | 320 million | |
| Starting Price (Monthly)(USD) | $0 (Free) or $6 (Standard) | $0 (Free) or $6 (Standard) | |
| Native Third-Party Integrations(count) | 500+ apps | 500+ apps | |
| Maximum Video Conference Participants(participants) | 10,000 participants | 10,000 participants |
Sourced from publicly available data · Jul 2026
Key Differences
7 attributes compared head-to-head
S
2SlackMicrosoft Teams leads1 tie
29%57%
Slack
Attribute
Microsoft Teams
- 750,000 paid customersMonthly Active Users320+ million monthly active users
- 2,400+ integrationsAvailable Third-Party Apps1,000+ integrations
- $8.75/user/month (billed annually)Standalone Pricing (Pro Plan)$6.50/user/month or free with Microsoft 365
- 1 GB shared workspace storageFile Storage per User (Free Tier)100 GB per user cloud storage
- 150 participants (unlimited duration)Video Conference Participant Limit300 participants (unlimited with Teams Premium)
- Last 90 daysSearch Message History (Free Plan)Last 90 days
- Extensive themes and sidebar customizationUser Interface CustomizationLimited customization options
- Monthly Active Users
Slack
750,000 paid customers
Microsoft Teams
320+ million monthly active users
- Available Third-Party Apps
Slack
2,400+ integrations
Microsoft Teams
1,000+ integrations
- Standalone Pricing (Pro Plan)
Slack
$8.75/user/month (billed annually)
Microsoft Teams
$6.50/user/month or free with Microsoft 365
- File Storage per User (Free Tier)
Slack
1 GB shared workspace storage
Microsoft Teams
100 GB per user cloud storage
- Video Conference Participant Limit
Slack
150 participants (unlimited duration)
Microsoft Teams
300 participants (unlimited with Teams Premium)
- Search Message History (Free Plan)
Slack
Last 90 days
Microsoft Teams
Last 90 days
- User Interface Customization
Slack
Extensive themes and sidebar customization
Microsoft Teams
Limited customization options
Full Comparison
| Attribute | Slack | Microsoft Teams |
|---|---|---|
| Daily Active Users(millions) | ~38 Million | 320 million |
| App Integrations(count) | 2,600+ | ~700 |
| Google Workspace Native Integration | Limited (requires custom setup) | — |
| Available Integrations(count) | 2,000+ integrations | — |
| Native Microsoft Office Integration | Full (Word, Excel, PowerPoint, Outlook) | — |
| Paid Starting Price(USD/user/mo) | $7.25 | Included with M365 |
| Standalone Monthly Pricing (Pro Tier)(USD per user per month) | $7.25 | $6.00 (with Microsoft 365 Business Basic) |
| Annual Cost per User (Pro Tier)(USD) | $87 (billed yearly) | $72 (bundled pricing) |
| Base Monthly Cost Per User(USD) | $8 | — |
| Base Monthly Cost Per User(USD) | $7.25 | — |
| Business+ Tier Monthly Cost Per User(USD) | $12.50 | — |
Show 24 more attributesPrice Stability (2024-2026)(months) No increases for 33 months — Free Tier Cost(USD) Free — Pro/Standard Monthly Cost(USD per user/month) $7.25 — Minimum Monthly Cost Per User(USD) $7.25 — Years Price Stable (2026)(months) 33+ months — Pro Plan Annual Cost(USD) $150 (billed monthly) — Pro Plan Monthly Cost (Annual Billing)(USD per user) $8.75 — Monthly Cost (Pro Plan)(USD) $12.50 per user/month — Enterprise Plan Monthly Cost Per User(USD) $12.50 — Paid Plan Starting Price(USD/user/month) $7.25 $6 Monthly Cost Per User(USD) $8-12.50 (Pro/Business+) — Monthly Cost (Pro Plan, 50 users)(USD) $412.50/month — Monthly Cost (10 Users, Annual)(USD) $150/month ($1,800/year) — Price Per User Per Month (Pro/Standard)(USD) $12.50/user (Pro plan) — Base Monthly Cost (10-person team)(USD) $80-150 — Cost for 50-person team(USD/month) $400-750 — Pro Plan Monthly Cost(USD per user) $8.75 $6.50 or free with Microsoft 365 Annual Subscription Cost (Pro, 100 users)(USD) $10,500 $7,800 or free with Microsoft 365 Starting Paid Plan Cost(USD/month) $6/month (Microsoft 365 bundle) — Free Plan Monthly Cost(USD) $6 (Teams Essentials) — Starting Monthly Price per User(USD) $4.50 — Base Pricing (Monthly)(USD) $7.00 (Business Basic 2026 price) — Free Plan Meeting Duration Limit(minutes) 60 minutes (group calls) — Starting Price (Monthly)(USD) $0 (Free) or $6 (Standard) — | ||
| Third-Party App Integrations(integrations) | 2,400+ | 1,000+ |
| Video Meeting Capacity(participants) | Up to 2,000 (with paid plan) | Up to 10,000 |
| Native Office Integration | Limited (third-party connectors) | Native with SharePoint, OneDrive, Office Web Apps |
| AI Copilot Features | Slack AI (summarization, search, assisted writing) | Microsoft Copilot Pro (enterprise AI, meeting insights) |
| Free Tier Meeting Participant Limit(participants) | Unlimited (Slack Huddles for video limited to 50 participants) | — |
| Native Video Conferencing | Huddles for brief video, limited to 50 participants; requires external tool for full conferencing | — |
Show 27 more attributesMeeting Recording & Auto-Transcription Not native; requires integration with Otter.ai or similar third-party services — Asynchronous Communication Strength(scale 1-5) 5 out of 5 (core feature with channels, threads, and history) — Third-Party Integrations Available(count) 2,000+ — Enterprise AI Features Advanced AI assistant, smart summaries, automation — Free Message History(days) 90 days maximum — Free Plan Message History Retention(days) 90 days — Free Plan External Guest Collaboration(capacity) Unlimited external guests via workspace invite — Email Service Included No — Message History Searchable(years) 10 years standard — Workflow Automation Steps(built-in steps) 50+ — Message History on Free Plan(days) 90-day limited access — Message History Retention(status) 10,000 messages (free); unlimited (paid) — Built-in Project Management(status) No (requires integrations) — File Storage Included(GB) 5GB (free); unlimited (paid plan) — Max Video Conference Participants(people) 1000 10000 Message History (Free Plan)(days) 90 unlimited Video Conference Max Participants(participants) 150 300 Message Search History (Free Tier)(days) 90 days 90 days Maximum Free Tier Group Meeting Duration(hours) 24 hours — AI Meeting Notes Availability Premium only ($10/user/month) — AI Meeting Summaries Basic transcription only — Free Meeting Duration (3+ participants)(minutes) 60 minutes — Real-Time Translation Languages(count) 31 languages — Maximum Video Meeting Participants(participants) 300+ participants — Language Translation Support(languages) 40+ languages (Teams Premium) — Maximum Video Conference Participants(participants) 10,000 participants — AI Assistant Integration(capability) Copilot with GPT-4, speech-to-text, real-time translation — | ||
| Message Search Speed(seconds) | Excellent - optimized search indexing | Good - improving with Copilot enhancements |
| Voice Audio Codec Quality(kHz) | 16 kHz | — |
| Maximum Video Call Participants(people) | 15 participants | — |
| Real-time Messaging Speed(ms (message delivery latency)) | 50-100ms (instant) | — |
| Desktop App Memory Usage(MB) | 280 MB | 450 MB |
Show 1 more attributeMinimum Bandwidth for HD Video(Mbps) 4.5 Mbps — | ||
| Mobile App Feature Parity(%) | 95% | 85% |
| Mobile App Type | Native iOS/Android with feature-parity | — |
| Google Workspace Integration Level | 2 out of 5 (available via integration, not native) | — |
| AI Features Count (2026)(features) | 30+ (CRM tools, meeting summaries, automation, SlackBot enhancements) | — |
| Available Integrations(integrations) | 2000+ | — |
| Native Integrations Available(count) | 2,200+ | — |
| Third-Party Integrations(integrations) | 2000+ | 500+ |
| Third-Party Integrations Available(integrations) | 2,300+ integrations | — |
| Pre-built Integrations(count) | 2,400+ integrations | — |
Show 1 more attributeNative Third-Party Integrations(count) 500+ apps — | ||
| Deployment Options | Cloud-based SaaS only | — |
| Deployment Options | Cloud-only (SaaS) | — |
| GDPR & Data Sovereignty Compliance | Compliant but data on Salesforce servers | — |
| End-to-End Encryption Available | DMs only, Enterprise+ plan | — |
| End-to-End Encryption Default | Not available | — |
| Enterprise Security Certifications(count) | SOC 2, HIPAA, FedRAMP, GDPR | SOC 2, HIPAA, FedRAMP, GDPR, DLP, eDiscovery |
| Enterprise Security Compliance(certifications) | ISO 27001, SOC 2, HIPAA, GDPR | — |
| Maximum Meeting Participants(participants) | Unlimited group chats | — |
| Third-party Integrations(integrations) | 2000+ | — |
| Native Integrations(integrations) | 2,300+ | — |
| Microsoft 365 Integration Depth(Apps Integrated) | 8+ apps (Outlook, Excel, Word, OneDrive, SharePoint, Project, Planner, Power BI) | — |
| AI Features (2026) | Workflow automation, search enhancement | — |
| Real-Time Translation | Not available | — |
| Asynchronous Communication | Optimized with threads and archives | — |
| Zoom Rooms Cost(USD per room/month) | N/A | — |
| AI Assistant Capability | Slack AI (optional on paid plans) | — |
| AI Transcription Languages Supported(languages) | 0 (not native feature) | — |
| AI Meeting Assistant | Slack AI (search, summarization, drafting) | — |
| AI Translation Languages (2026)(languages) | Limited translation features | — |
| AI Meeting Assistant Cost(USD/month) | Copilot Pro required ($20+ per tenant) | — |
| Workflow Automation Complexity | Advanced with conditional logic | — |
| Storage Per User (Standard Plan)(GB) | Variable by plan | — |
| Cloud Storage (Base Plan)(GB) | 10 GB | — |
| Free Tier File Storage(GB per user) | 1 GB shared workspace | 100 GB per user |
| Meeting Recording Retention (Free)(days) | Unlimited (OneDrive) | — |
| Open Source | No, proprietary | — |
| Maximum Video Length (Free Tier)(minutes) | N/A | — |
| Maximum Video Resolution(pixels) | Requires 3rd party | 1080p @ 30fps |
| Maximum Video Sharing Quality(fps at resolution) | 4K at 30fps | — |
| Free Tier Message History Retention(days) | 90 days | — |
| Message History Retention (Free Plan)(days) | 90 days (10,000 message limit) | — |
| Enterprise Uptime SLA(percent) | 99.99% | — |
| Uptime SLA Guarantee(%) | 99.99% | — |
| Uptime Guarantee(%) | 99.99% | 99.9% |
| User Workspace Limit (Free Tier)(workspaces) | 1 workspace | — |
| Maximum Meeting Participants (Free)(participants) | 3 participants | — |
| Maximum Meeting Participants (Paid)(participants) | Unlimited (slide deck view only) | — |
| Free Plan Message History(months) | 90 days | — |
| FedRAMP Authorization(availability) | No | — |
| HIPAA Compliance Certified | Yes (Business+ plan required) | — |
| Data Residency Control | Microsoft-managed regional datacenters (limited control) | — |
| SOC 2 Type II Certified | Yes | — |
| Custom Workflow Automation | Advanced (Workflow Builder, automations) | — |
| Users Per Workspace(count) | Unlimited | — |
| Maximum Webinar Participants(participants) | 10,000 | — |
| Maximum Meeting Participants(participants) | 1,000+ participants | — |
| Total Registered Users(millions) | 750 million | — |
| Daily Posts Published (Organic)(millions) | N/A | — |
| Active Workspaces(workspaces) | 750,000+ | — |
| Monthly Active Users(users) | 750,000 paid customers | 320 million monthly active users |
| Registered Users Globally(millions) | 350+ million monthly active users | — |
| Monthly Active Users (MAU)(millions) | 320M | — |
| Threading Model | Channel-based threads (contextual loss in active channels) | — |
| Open Source | Proprietary (closed-source) | — |
| Native Video/Audio Calls | Yes (Slack Huddles) | — |
| Native App Integrations Available(count) | 2,400+ apps | — |
| Self-Hosting Capability | No, cloud-only | — |
| Self-Hosted/On-Premises Option | No (cloud-only) | — |
| Paid Workspaces/Users (Enterprise Adoption)(workspaces) | 750,000+ paid workspaces | — |
| Active Global Workspaces/Deployments(count) | 750,000+ active workspaces | — |
| Source Code Availability | Proprietary/closed | Proprietary (closed-source) |
| Setup Time for New Team(hours) | 0.5-1 hour | — |
| Voice Codec Quality Rating(score (1-10)) | 7.5 | 8 |
| Voice Chat Quality Rating(subjective score) | Excellent (optimized for reliability) | — |
| Time to Deploy(days) | 3-7 | 1-3 |
| Learning Curve(1-10 scale (1=easiest)) | 2 | 5 |
| User Learning Curve(difficulty rating) | Steep (enterprise-focused interface) | — |
| Free Cloud Recording Capability | No, paid only | — |
| Free Meeting Duration Limit(minutes) | 60 minutes | — |
| Office 365 Native Integration | Full native integration | — |
| Browser Join Without App | Often requires app/account | — |
| Maximum Free Breakout Rooms(rooms) | 50 rooms | — |
| Free Tier Participant Limit(participants) | 100 participants | — |
| Advanced Chat Features (Channels, Threading, Workflows) | Advanced (channels, nested threads, queues, connectors) | — |
| Gartner Meeting Solutions Rating(stars) | 4.5 stars | — |
| Gartner Review Sample Size(reviews) | 3,669 reviews | — |
| Gartner Customer Rating(stars) | 4.5 stars | — |
| Customer Reviews Analyzed(count) | 3,668 reviews | — |
| 3-Year Total Cost of Ownership (1,000 users)(USD) | Lower (integrated M365) | — |
| Video Quality Rating(%) | 7.9% positive | — |
| Real-Time Translation Support(null) | Limited to basic captions | — |
| Native Cisco Hardware Integration(null) | Third-party device support only | — |
| AI Features in Base Tier | Limited (Copilot requires E5) | — |
| Enterprise Deployment Adoption (500+ seat orgs)(percentage) | 67% of deployments | — |
| 3-Year TCO Advantage for 1,000 Users with M365(percentage savings) | 47% lower cost | — |
| Video Resolution Support(maximum resolution) | 4K (3840x2160) | — |
| Supported Operating Systems(platforms) | Windows, Mac, iOS, Android, Web | — |
| Monthly Active Users (2024)(millions) | 320 million | — |
SSlack
Microsoft TeamsDaily Active Users(millions)
~38 Million
320 million
App Integrations(count)
2,600+
~700
Google Workspace Native Integration
Limited (requires custom setup)
—
Available Integrations(count)
2,000+ integrations
—
Native Microsoft Office Integration
Full (Word, Excel, PowerPoint, Outlook)
—
Paid Starting Price(USD/user/mo)
$7.25
Included with M365
Standalone Monthly Pricing (Pro Tier)(USD per user per month)
$7.25
$6.00 (with Microsoft 365 Business Basic)
Annual Cost per User (Pro Tier)(USD)
$87 (billed yearly)
$72 (bundled pricing)
Base Monthly Cost Per User(USD)
$8
—
Base Monthly Cost Per User(USD)
$7.25
—
Business+ Tier Monthly Cost Per User(USD)
$12.50
—
Show 24 more attributes
Price Stability (2024-2026)(months)
No increases for 33 months
—
Free Tier Cost(USD)
Free
—
Pro/Standard Monthly Cost(USD per user/month)
$7.25
—
Minimum Monthly Cost Per User(USD)
$7.25
—
Years Price Stable (2026)(months)
33+ months
—
Pro Plan Annual Cost(USD)
$150 (billed monthly)
—
Pro Plan Monthly Cost (Annual Billing)(USD per user)
$8.75
—
Monthly Cost (Pro Plan)(USD)
$12.50 per user/month
—
Enterprise Plan Monthly Cost Per User(USD)
$12.50
—
Paid Plan Starting Price(USD/user/month)
$7.25
$6
Monthly Cost Per User(USD)
$8-12.50 (Pro/Business+)
—
Monthly Cost (Pro Plan, 50 users)(USD)
$412.50/month
—
Monthly Cost (10 Users, Annual)(USD)
$150/month ($1,800/year)
—
Price Per User Per Month (Pro/Standard)(USD)
$12.50/user (Pro plan)
—
Base Monthly Cost (10-person team)(USD)
$80-150
—
Cost for 50-person team(USD/month)
$400-750
—
Pro Plan Monthly Cost(USD per user)
$8.75
$6.50 or free with Microsoft 365
Annual Subscription Cost (Pro, 100 users)(USD)
$10,500
$7,800 or free with Microsoft 365
Starting Paid Plan Cost(USD/month)
$6/month (Microsoft 365 bundle)
—
Free Plan Monthly Cost(USD)
$6 (Teams Essentials)
—
Starting Monthly Price per User(USD)
$4.50
—
Base Pricing (Monthly)(USD)
$7.00 (Business Basic 2026 price)
—
Free Plan Meeting Duration Limit(minutes)
60 minutes (group calls)
—
Starting Price (Monthly)(USD)
$0 (Free) or $6 (Standard)
—
Third-Party App Integrations(integrations)
2,400+
1,000+
Video Meeting Capacity(participants)
Up to 2,000 (with paid plan)
Up to 10,000
Native Office Integration
Limited (third-party connectors)
Native with SharePoint, OneDrive, Office Web Apps
AI Copilot Features
Slack AI (summarization, search, assisted writing)
Microsoft Copilot Pro (enterprise AI, meeting insights)
Free Tier Meeting Participant Limit(participants)
Unlimited (Slack Huddles for video limited to 50 participants)
—
Native Video Conferencing
Huddles for brief video, limited to 50 participants; requires external tool for full conferencing
—
Show 27 more attributes
Meeting Recording & Auto-Transcription
Not native; requires integration with Otter.ai or similar third-party services
—
Asynchronous Communication Strength(scale 1-5)
5 out of 5 (core feature with channels, threads, and history)
—
Third-Party Integrations Available(count)
2,000+
—
Enterprise AI Features
Advanced AI assistant, smart summaries, automation
—
Free Message History(days)
90 days maximum
—
Free Plan Message History Retention(days)
90 days
—
Free Plan External Guest Collaboration(capacity)
Unlimited external guests via workspace invite
—
Email Service Included
No
—
Message History Searchable(years)
10 years standard
—
Workflow Automation Steps(built-in steps)
50+
—
Message History on Free Plan(days)
90-day limited access
—
Message History Retention(status)
10,000 messages (free); unlimited (paid)
—
Built-in Project Management(status)
No (requires integrations)
—
File Storage Included(GB)
5GB (free); unlimited (paid plan)
—
Max Video Conference Participants(people)
1000
10000
Message History (Free Plan)(days)
90
unlimited
Video Conference Max Participants(participants)
150
300
Message Search History (Free Tier)(days)
90 days
90 days
Maximum Free Tier Group Meeting Duration(hours)
24 hours
—
AI Meeting Notes Availability
Premium only ($10/user/month)
—
AI Meeting Summaries
Basic transcription only
—
Free Meeting Duration (3+ participants)(minutes)
60 minutes
—
Real-Time Translation Languages(count)
31 languages
—
Maximum Video Meeting Participants(participants)
300+ participants
—
Language Translation Support(languages)
40+ languages (Teams Premium)
—
Maximum Video Conference Participants(participants)
10,000 participants
—
AI Assistant Integration(capability)
Copilot with GPT-4, speech-to-text, real-time translation
—
Message Search Speed(seconds)
Excellent - optimized search indexing
Good - improving with Copilot enhancements
Voice Audio Codec Quality(kHz)
16 kHz
—
Maximum Video Call Participants(people)
15 participants
—
Real-time Messaging Speed(ms (message delivery latency))
50-100ms (instant)
—
Desktop App Memory Usage(MB)
280 MB
450 MB
Show 1 more attribute
Minimum Bandwidth for HD Video(Mbps)
4.5 Mbps
—
Mobile App Feature Parity(%)
95%
85%
Mobile App Type
Native iOS/Android with feature-parity
—
Google Workspace Integration Level
2 out of 5 (available via integration, not native)
—
AI Features Count (2026)(features)
30+ (CRM tools, meeting summaries, automation, SlackBot enhancements)
—
Available Integrations(integrations)
2000+
—
Native Integrations Available(count)
2,200+
—
Third-Party Integrations(integrations)
2000+
500+
Third-Party Integrations Available(integrations)
2,300+ integrations
—
Pre-built Integrations(count)
2,400+ integrations
—
Show 1 more attribute
Native Third-Party Integrations(count)
500+ apps
—
Deployment Options
Cloud-based SaaS only
—
Deployment Options
Cloud-only (SaaS)
—
GDPR & Data Sovereignty Compliance
Compliant but data on Salesforce servers
—
End-to-End Encryption Available
DMs only, Enterprise+ plan
—
End-to-End Encryption Default
Not available
—
Enterprise Security Certifications(count)
SOC 2, HIPAA, FedRAMP, GDPR
SOC 2, HIPAA, FedRAMP, GDPR, DLP, eDiscovery
Enterprise Security Compliance(certifications)
ISO 27001, SOC 2, HIPAA, GDPR
—
Maximum Meeting Participants(participants)
Unlimited group chats
—
Third-party Integrations(integrations)
2000+
—
Native Integrations(integrations)
2,300+
—
Microsoft 365 Integration Depth(Apps Integrated)
8+ apps (Outlook, Excel, Word, OneDrive, SharePoint, Project, Planner, Power BI)
—
AI Features (2026)
Workflow automation, search enhancement
—
Real-Time Translation
Not available
—
Asynchronous Communication
Optimized with threads and archives
—
Zoom Rooms Cost(USD per room/month)
N/A
—
AI Assistant Capability
Slack AI (optional on paid plans)
—
AI Transcription Languages Supported(languages)
0 (not native feature)
—
AI Meeting Assistant
Slack AI (search, summarization, drafting)
—
AI Translation Languages (2026)(languages)
Limited translation features
—
AI Meeting Assistant Cost(USD/month)
Copilot Pro required ($20+ per tenant)
—
Workflow Automation Complexity
Advanced with conditional logic
—
Storage Per User (Standard Plan)(GB)
Variable by plan
—
Cloud Storage (Base Plan)(GB)
10 GB
—
Free Tier File Storage(GB per user)
1 GB shared workspace
100 GB per user
Meeting Recording Retention (Free)(days)
Unlimited (OneDrive)
—
Open Source
No, proprietary
—
Maximum Video Length (Free Tier)(minutes)
N/A
—
Maximum Video Resolution(pixels)
Requires 3rd party
1080p @ 30fps
Maximum Video Sharing Quality(fps at resolution)
4K at 30fps
—
Free Tier Message History Retention(days)
90 days
—
Message History Retention (Free Plan)(days)
90 days (10,000 message limit)
—
Enterprise Uptime SLA(percent)
99.99%
—
Uptime SLA Guarantee(%)
99.99%
—
Uptime Guarantee(%)
99.99%
99.9%
User Workspace Limit (Free Tier)(workspaces)
1 workspace
—
Maximum Meeting Participants (Free)(participants)
3 participants
—
Maximum Meeting Participants (Paid)(participants)
Unlimited (slide deck view only)
—
Free Plan Message History(months)
90 days
—
FedRAMP Authorization(availability)
No
—
HIPAA Compliance Certified
Yes (Business+ plan required)
—
Data Residency Control
Microsoft-managed regional datacenters (limited control)
—
SOC 2 Type II Certified
Yes
—
Custom Workflow Automation
Advanced (Workflow Builder, automations)
—
Users Per Workspace(count)
Unlimited
—
Maximum Webinar Participants(participants)
10,000
—
Maximum Meeting Participants(participants)
1,000+ participants
—
Total Registered Users(millions)
750 million
—
Daily Posts Published (Organic)(millions)
N/A
—
Active Workspaces(workspaces)
750,000+
—
Monthly Active Users(users)
750,000 paid customers
320 million monthly active users
Registered Users Globally(millions)
350+ million monthly active users
—
Monthly Active Users (MAU)(millions)
320M
—
Threading Model
Channel-based threads (contextual loss in active channels)
—
Open Source
Proprietary (closed-source)
—
Native Video/Audio Calls
Yes (Slack Huddles)
—
Native App Integrations Available(count)
2,400+ apps
—
Self-Hosting Capability
No, cloud-only
—
Self-Hosted/On-Premises Option
No (cloud-only)
—
Paid Workspaces/Users (Enterprise Adoption)(workspaces)
750,000+ paid workspaces
—
Active Global Workspaces/Deployments(count)
750,000+ active workspaces
—
Source Code Availability
Proprietary/closed
Proprietary (closed-source)
Setup Time for New Team(hours)
0.5-1 hour
—
Voice Codec Quality Rating(score (1-10))
7.5
8
Voice Chat Quality Rating(subjective score)
Excellent (optimized for reliability)
—
Time to Deploy(days)
3-7
1-3
Learning Curve(1-10 scale (1=easiest))
2
5
User Learning Curve(difficulty rating)
Steep (enterprise-focused interface)
—
Free Cloud Recording Capability
No, paid only
—
Free Meeting Duration Limit(minutes)
60 minutes
—
Office 365 Native Integration
Full native integration
—
Browser Join Without App
Often requires app/account
—
Maximum Free Breakout Rooms(rooms)
50 rooms
—
Free Tier Participant Limit(participants)
100 participants
—
Advanced Chat Features (Channels, Threading, Workflows)
Advanced (channels, nested threads, queues, connectors)
—
Gartner Meeting Solutions Rating(stars)
4.5 stars
—
Gartner Review Sample Size(reviews)
3,669 reviews
—
Gartner Customer Rating(stars)
4.5 stars
—
Customer Reviews Analyzed(count)
3,668 reviews
—
3-Year Total Cost of Ownership (1,000 users)(USD)
Lower (integrated M365)
—
Video Quality Rating(%)
7.9% positive
—
Real-Time Translation Support(null)
Limited to basic captions
—
Native Cisco Hardware Integration(null)
Third-party device support only
—
AI Features in Base Tier
Limited (Copilot requires E5)
—
Enterprise Deployment Adoption (500+ seat orgs)(percentage)
67% of deployments
—
3-Year TCO Advantage for 1,000 Users with M365(percentage savings)
47% lower cost
—
Video Resolution Support(maximum resolution)
4K (3840x2160)
—
Supported Operating Systems(platforms)
Windows, Mac, iOS, Android, Web
—
Monthly Active Users (2024)(millions)
320 million
—
Pros & Cons
10 pros·4 cons across both
S
S
Slack
+5-2
71% positive
Pros
- 2,400+ third-party integrations including GitHub, Jira, Salesforce, and HubSpot
- Superior user interface with intuitive navigation and extensive customization options
- Full message search history available on Pro plan with no time restrictions
- Thread-based conversations reduce channel clutter and improve organization
- Best-in-class mobile apps with feature parity to desktop version
Cons
- Significantly more expensive at $8.75/user/month standalone (vs. Teams' free tier with Microsoft 365)
- Limited free tier functionality—only 90 days of message history and 1 GB workspace storage
Microsoft Teams
+5-2
71% positive
Pros
- Free with Microsoft 365 subscriptions (used by 365+ million Office users globally)
- 100 GB per-user cloud storage on free tier vs. Slack's 1 GB shared workspace
- Seamless integration with Word, Excel, PowerPoint, SharePoint, Outlook, and OneDrive—files open natively in Teams
- Supports up to 300-participant video meetings with built-in recording and transcription
- Enterprise-grade security and compliance (SOC 2 Type II, FedRAMP, HIPAA)
Cons
- Only 1,000+ integrations available—significantly fewer than Slack's 2,400+
- User interface less polished than Slack with steeper learning curve for new users
Frequently Asked Questions
5 questions
Microsoft Teams offers a free tier with 100 GB per-user cloud storage, group video calls up to 60 minutes and 100 participants, and access to Office apps. However, it's truly free only if you don't have a Microsoft 365 subscription—most enterprises already include Teams in their Microsoft 365 deployments at no additional cost. Slack's free tier is more limited, offering only 1 GB shared workspace storage and 90-day message history.
Resources & Learn More
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