Slack vs Microsoft Teams: Complete Comparison (2026) | Comparison
Slack is the pioneer of team messaging with a cleaner interface and better third-party integrations. Microsoft Teams has 320M+ daily active users — largely due to Office 365 bundling — and better video conferencing. Teams is free with Microsoft 365; Slack charges for most features.
Slack
Cloud-based team messaging and collaboration platform with advanced search and thread-focused conversations.
Startups, tech companies, and developer teams
Microsoft Teams
Enterprise collaboration platform integrated with Microsoft 365 suite, offering messaging, video calls, and Office app integration.
Enterprise teams using Microsoft 365
Quick Answer
AI SummarySlack is the pioneer of team messaging with a cleaner interface and better third-party integrations. Microsoft Teams has 320M+ daily active users — largely due to Office 365 bundling — and better video conferencing. Teams is free with Microsoft 365; Slack charges for most features.
Our Verdict
AI-assistedSlack for startups and developers who value integrations and UX. Teams for enterprises already using Microsoft 365. Teams wins on scale; Slack wins on experience.
Was this verdict helpful?
Choose Slack if
Startups, tech companies, and developer teams
Choose Microsoft Teams if
Best pickEnterprise teams using Microsoft 365
Track this comparison
Get notified when prices change, new specs ship, or our verdict updates.
Triggers: price change new spec verdict update
No spam. Stop anytime.
Key Differences at a Glance
- Daily Active Users:✓ Microsoft Teams wins(320M+ vs ~38M)
- Interface Quality:✓ Slack wins(Excellent vs Moderate)
- Video Calling:✓ Microsoft Teams wins(Excellent vs Good)
Key Facts & Figures
141 numeric metrics compared
| Metric | Slack | Microsoft Teams | Ratio |
|---|---|---|---|
| Daily Active Users(millions) | ~38 Million | 320 million | |
| App Integrations(count) | 2,600+ | ~700 | |
| 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) | |
| Third-Party App Integrations(integrations) | 2,400+ | 1,000+ | |
| Video Meeting Capacity(participants) | Up to 2,000 (with paid plan) | Up to 10,000 | |
| Mobile App Feature Parity(%) | 95% | 85% | |
| Base Monthly Cost Per User(USD) | $8.25 (Pro plan, min 3 users) | — | — |
| 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) | 2200+ | 1000+ | |
| Pro Plan Annual Cost(USD) | $150 (billed monthly) | $70/year (via Microsoft 365 Business Basic) | |
| 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 | 1,000+ native 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(partners) | 2000+ integrations | 500+ | |
| 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 | |
| Cloud Storage (Base Plan)(GB) | 10 GB | — | — |
| Monthly Cost Per User(USD) | $8-12.50 (Pro/Business+) | — | — |
| Active Workspaces(workspaces) | 750,000+ | — | — |
| Native Integrations(count) | 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 | — | — |
| 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), varies by plan | — | — |
| Setup Time for New Team(hours) | 0.5-1 hour | — | — |
| Max Video Conference Participants(people) | 1000 | 10000 | |
| Message History (Free Plan)(days) | 90 | unlimited | — |
| Voice Codec Quality Rating(score (1-10)) | 7.5 | 8 | |
| Enterprise Security Certifications | SOC 2, HIPAA, FedRAMP, GDPR | SOC 2, HIPAA, FedRAMP, GDPR, DLP, eDiscovery | |
| Time to Deploy(days) | 3-7 | 1-3 | |
| Uptime Guarantee(percent) | 99.99% | 99.9% | |
| Pro Plan Monthly Cost(USD/month) | $8.75 | $6.50 or free with Microsoft 365 | |
| Video Conference Max Participants(participants) | 150 | 300 | |
| Free Tier File Storage(GB per user) | 1 GB shared workspace | 100 GB per user | |
| 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 | |
| Desktop App Memory Usage(MB) | 280 MB | 450 MB | |
| Monthly subscription cost (Pro plan)(USD per user) | $12.50 | — | — |
| Native third-party integrations(count) | 100+ | 500+ apps | |
| Message search response time(milliseconds) | <500ms | — | — |
| User interface satisfaction rating(out of 10) | 9.2/10 | — | — |
| Maximum video call participants (free tier)(people) | 100 participants | — | — |
| Service uptime SLA guarantee(percent) | 99.99% | — | — |
| Message history retention (free plan)(days) | 90 days searchable | — | — |
| Enterprise app marketplace size(applications) | 2,000+ apps (Slack App Directory) | — | — |
| Team Size Cost Efficiency Threshold(team members) | Cost-effective until ~12 users | — | — |
| Message History Searchability(months) | 90 days (Free/Pro), unlimited with Enterprise | — | — |
| Average User Adoption Time(days) | 1-3 days | — | — |
| Global Active Users(millions) | 750+ million messages daily across 750k+ organizations | — | — |
| Monthly Subscription Cost (Pro/Standard)(USD) | $8.25 | $0 (bundled) or $12.50 (standalone) | |
| Message Delivery Latency(milliseconds) | <100ms | 200-300ms | |
| File Upload Limit(GB) | 20GB | 250GB | |
| Message History Retention (Free Tier)(days) | 90 days | Unlimited | — |
| G2 Ease of Use Rating (2024)(stars) | 4.5/5 | 4.0/5 | |
| Video Meeting Participant Limit(participants) | 2000 | 300 | |
| Pro Plan Monthly Cost Per User(USD) | $12.50 | $6.00 | |
| File Storage Per User(GB) | 100 (workspace) | 1000 (1TB OneDrive) | |
| Free Group Video Call Duration Limit(minutes) | 40 | 60 | |
| Maximum Video Conference Participants (Free)(people) | Limited (typically 3-4) | 100 | |
| G2 User Interface Rating(out of 5) | 4.6/5 (12,400 reviews) | 4.1/5 (8,300 reviews) | |
| 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) | |
| Maximum Video Conference Participants(participants) | 10,000 participants | 10,000 participants | |
| Voice Latency(ms) | 50-100ms | 50-100ms | |
| Free Tier Call Duration Limit(minutes) | 60 minutes (100 participants max) | 60 minutes (100 participants max) | |
| Monthly Cost (1 Pro User)(USD) | $6.00 | $6.00 | |
| Screen Sharing Maximum FPS(fps) | 30fps | 30fps | |
| Supported Language Captions(languages) | 60+ languages | 60+ languages | |
| Maximum Free Server Categories(categories) | Limited (fixed structure) | Limited (fixed structure) | |
| Enterprise Fortune 500 Adoption Rate(percent) | 80% | 80% | |
| Free Tier Meeting Duration for Group Calls(minutes) | 60 minutes (unlimited participants) | 60 minutes (unlimited participants) | |
| Maximum Participants (Standard Meeting)(people) | 300 participants | 300 participants | |
| Free Plan Cloud Storage(GB) | 5 GB (OneDrive) | 5 GB (OneDrive) | |
| Breakout Rooms Maximum Count(rooms) | 50 breakout rooms | 50 breakout rooms | |
| Global Enterprise Video Conferencing Market Share (2024)(percent) | 28.2% | 28.2% | |
| Active Monthly Users(millions) | 300+ million users | 300+ million users | |
| Base Monthly Cost (Single User)(USD) | $4.00 (Teams Essentials) - $12.50 (Teams Premium) | $4.00 (Teams Essentials) - $12.50 (Teams Premium) | |
| Maximum File Upload Size(GB) | 2 GB per file | 2 GB per file | |
| Annual TCO (1,000 users, 3-year average)(USD) | $48,000-150,000 | $48,000-150,000 |
Sourced from publicly available data ·
Key Differences
5 attributes compared head-to-head
- ~38MDaily Active Users320M+(winner)
- Excellent(winner)Interface QualityModerate
- GoodVideo CallingExcellent(winner)
- $7.25+/user/moPriceIncluded in M365(winner)
- Superior(winner)Developer IntegrationsGood
- Daily Active Users
Slack
~38M
Microsoft Teams
320M+(winner)
- Interface Quality
Slack
Excellent(winner)
Microsoft Teams
Moderate
- Video Calling
Slack
Good
Microsoft Teams
Excellent(winner)
- Price
Slack
$7.25+/user/mo
Microsoft Teams
Included in M365(winner)
- Developer Integrations
Slack
Superior(winner)
Microsoft Teams
Good
Full Comparison
| Attribute | Slack | |
|---|---|---|
| Daily Active Users(millions) | ~38 Million | 320 million(winner) |
| App Integrations(count) | 2,600+(winner) | ~700 |
| Google Workspace Native Integration | Limited (requires custom setup) | — |
| Native third-party integrations(count) | 100+ | 500+ apps(winner) |
| Native Microsoft 365 Integration(integration level) | API-based (basic) | Native (deep) |
| Microsoft 365 Integration Depth(integration level) | 8+ apps (Outlook, Excel, Word, OneDrive, SharePoint, Project, Planner, Power BI) | — |
Show 2 more attributesNative Microsoft Office Integration Full (Word, Excel, PowerPoint, Outlook) — Microsoft 365 Ecosystem Integration(integration depth) Native: Word, Excel, SharePoint, OneDrive, Outlook, Power BI — | ||
| Paid Starting Price(USD/user/mo) | $7.25(winner) | Included with M365 |
| Standalone Monthly Pricing (Pro Tier)(USD per user per month) | $7.25 | $6.00 (with Microsoft 365 Business Basic)(winner) |
| Annual Cost per User (Pro Tier)(USD) | $87 (billed yearly) | $72 (bundled pricing)(winner) |
| Base Monthly Cost Per User(USD) | $8.25 (Pro plan, min 3 users) | — |
| Base Monthly Cost Per User(USD) | $7.25 | — |
| Business+ Tier Monthly Cost Per User(USD) | $12.50 | — |
Show 31 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) $70/year (via Microsoft 365 Business Basic) 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/month) $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 Monthly subscription cost (Pro plan)(USD per user) $12.50 — Team Size Cost Efficiency Threshold(team members) Cost-effective until ~12 users — Monthly Subscription Cost (Pro/Standard)(USD) $8.25 $0 (bundled) or $12.50 (standalone) Pro Plan Monthly Cost Per User(USD) $12.50 $6.00 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) — Free Tier Call Duration Limit(minutes) 60 minutes (100 participants max) — Monthly Cost (1 Pro User)(USD) $6.00 — Base Monthly Cost (Single User)(USD) $4.00 (Teams Essentials) - $12.50 (Teams Premium) — | ||
| Third-Party App Integrations(integrations) | 2,400+(winner) | 1,000+ |
| Available Integrations(integrations) | 2000+ | — |
| Third-Party Integrations(partners) | 2000+ integrations(winner) | 500+ |
| Video Meeting Capacity(participants) | Up to 2,000 (with paid plan) | Up to 10,000(winner) |
| 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 31 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 — Available Integrations(count) 2,000+ integrations 1,000+ native integrations 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) — 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 Message Search Speed (Free Tier)(indexing scope) All messages indexed instantly Last 3 months only Message History Retention (Free Tier)(days) 90 days Unlimited Video Meeting Participant Limit(participants) 2000 300 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 — Supported Language Captions(languages) 60+ languages — Breakout Rooms Maximum Count(rooms) 50 breakout rooms — | ||
| Message Search Speed(seconds) | Excellent - optimized search indexing | 2-4 seconds average |
| 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(winner) | 450 MB |
Show 5 more attributesMessage search response time(milliseconds) <500ms — Message Delivery Latency(milliseconds) <100ms 200-300ms Minimum Bandwidth for HD Video(Mbps) 4.5 Mbps — Voice Latency(ms) 50-100ms — Screen Sharing Maximum FPS(fps) 30fps — | ||
| Mobile App Feature Parity(%) | 95%(winner) | 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) | — |
| Deployment Options | Cloud-based SaaS only | — |
| 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 | SOC 2, HIPAA, FedRAMP, GDPR | SOC 2, HIPAA, FedRAMP, GDPR, DLP, eDiscovery(winner) |
| Enterprise Security Compliance(certifications) | ISO 27001, SOC 2, HIPAA, GDPR | — |
| Maximum Meeting Participants(participants) | Unlimited group chats | — |
| Third-Party Integrations Available(integrations) | 2,300+ integrations | — |
| Built-in Task Management(features) | No: messaging-only, requires integrations | — |
| Message History Searchability(months) | 90 days (Free/Pro), unlimited with Enterprise | — |
| Third-party Integrations(integrations) | 2000+ | — |
| Native Integrations(count) | 2,300+ | — |
| Pre-Built Integrations(count) | 2,400+ integrations | — |
| 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) | — |
Show 1 more attributeAI Assistant Integration Copilot with GPT-4, speech-to-text, real-time translation — | ||
| Workflow Automation Complexity | Advanced with conditional logic | — |
| Storage Per User (Standard Plan)(GB) | Variable by plan | — |
| Cloud Storage (Base Plan)(GB) | 10 GB | — |
| File Storage Included(GB) | 5GB (Free), varies by plan | — |
| Free Tier File Storage(GB per user) | 1 GB shared workspace | 100 GB per user(winner) |
| Message history retention (free plan)(days) | 90 days searchable | — |
Show 4 more attributesFile Upload Limit(GB) 20GB 250GB File Storage Per User(GB) 100 (workspace) 1000 (1TB OneDrive) Meeting Recording Retention (Free)(days) Unlimited (OneDrive) — Free Plan Cloud Storage(GB) 5 GB (OneDrive) — | ||
| Open Source | No, proprietary | — |
| Maximum Video Length (Free Tier)(minutes) | N/A | — |
| Maximum Video Resolution(pixels) | Requires 3rd party | 1080p (1920x1080) |
| Native Integrations Available(count) | 2200+(winner) | 1000+ |
| Enterprise app marketplace size(applications) | 2,000+ apps (Slack App Directory) | — |
| Free Tier Message History Retention(days) | 90 days | — |
| Enterprise Uptime SLA(percent) | 99.99% | — |
| Uptime SLA Guarantee(%) | 99.99% | — |
| Uptime Guarantee(percent) | 99.99%(winner) | 99.9% |
| Service uptime SLA guarantee(percent) | 99.99% | — |
| 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(boolean) | No | — |
| HIPAA Compliance Certified | Yes (Business+ plan required) | Yes |
| 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+ | — |
| Global Active Users(millions) | 750+ million messages daily across 750k+ organizations | — |
| Registered Users Globally(millions) | 350+ million monthly active users | — |
| Monthly Active Users (MAU)(millions) | 320M | — |
| Active Monthly Users(millions) | 300+ million users | — |
| Threading Model | Channel-based threads (contextual loss in active channels) | — |
| Deployment Options | Cloud-only (SaaS) | — |
| 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) | — |
| Self-Hosted Deployment Option | Cloud-only SaaS | — |
| 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(winner) |
| Voice Chat Quality Rating(subjective score) | Excellent (optimized for reliability) | — |
| Time to Deploy(days) | 3-7 | 1-3(winner) |
| Learning Curve(hours to proficiency) | 2(winner) | 5 |
| Monthly Active Users(users) | 0.75 million | 360 million(winner) |
| User interface satisfaction rating(out of 10) | 9.2/10 | — |
| Average User Adoption Time(days) | 1-3 days | — |
| G2 Ease of Use Rating (2024)(stars) | 4.5/5(winner) | 4.0/5 |
| G2 User Interface Rating(out of 5) | 4.6/5 (12,400 reviews)(winner) | 4.1/5 (8,300 reviews) |
| Maximum video call participants (free tier)(people) | 100 participants | — |
| Free Group Video Call Duration Limit(minutes) | 40 | 60(winner) |
| Maximum Video Conference Participants (Free)(people) | Limited (typically 3-4) | 100(winner) |
| Message Search Capability(text) | Full-text indexed across all messages | Basic keyword search (limited free tier) |
| 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 | — |
| Maximum Participants (Standard Meeting)(people) | 300 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) | — |
| Maximum Video Sharing Quality(fps at resolution) | 4K at 30fps | — |
| Enterprise Deployment Adoption (500+ seat orgs)(percentage) | 67% of deployments | — |
| Global Enterprise Video Conferencing Market Share (2024)(percent) | 28.2% | — |
| 3-Year TCO Advantage for 1,000 Users with M365(percentage savings) | 47% lower cost | — |
| Video Resolution Support(maximum resolution) | 4K (3840x2160) | — |
| User Learning Curve(difficulty rating) | Steep (enterprise-focused interface) | — |
| Supported Operating Systems(platforms) | Windows, Mac, iOS, Android, Web | — |
| Monthly Active Users (2024)(millions) | 320 million | — |
| Maximum Free Server Categories(categories) | Limited (fixed structure) | — |
| Enterprise Fortune 500 Adoption Rate(percent) | 80% | — |
| Free Tier Meeting Duration for Group Calls(minutes) | 60 minutes (unlimited participants) | — |
| Maximum File Upload Size(GB) | 2 GB per file | — |
| Open-Source Availability | Proprietary closed-source | — |
| Annual TCO (1,000 users, 3-year average)(USD) | $48,000-150,000 | — |
Show 2 more attributes
Show 31 more attributes
Show 31 more attributes
Show 5 more attributes
Show 1 more attribute
Show 4 more attributes
Pros & Cons
8 pros·6 cons across both
Slack
Pros
- Cleaner, more intuitive interface
- 2,600+ app integrations
- Better organized channels
- Preferred by developers
Cons
- $7.25-12.50/user/month for most features
- Video calling less polished
- Smaller user base than Teams
Microsoft Teams
Pros
- 320M+ daily active users
- Included with Microsoft 365
- Excellent video conferencing
- Deep Office integration
Cons
- Cluttered interface
- Slower performance
- Less intuitive than Slack
Frequently Asked Questions
3 questions
Microsoft Teams is bundled with Microsoft 365, which is used by 300M+ business users globally. Slack grew organically without this distribution advantage.
Resources & Learn More
Curated sources to dive deeper
Where to Buy
As an affiliate, we may earn a commission from qualifying purchases at no extra cost to you. Learn more about our affiliate disclosure
Wikipedia
- W
Slack on Wikipedia (opens in new tab)
Cloud-based team messaging and collaboration platform with advanced search and thread-focused conversations.
- W
Microsoft Teams on Wikipedia (opens in new tab)
Enterprise collaboration platform integrated with Microsoft 365 suite, offering messaging, video calls, and Office app integration.
Related Comparisons
12 more to explore
slack vs teams vs discord
softwareSlack vs Microsoft Teams
softwareSlack vs Microsoft Teams
softwareSlack vs Microsoft Teams
softwareSlack vs Microsoft Teams
softwarePorkbun vs Cloudflare
Google Meet vs Slack
softwareGoogle Meet vs Microsoft Teams
softwareMicrosoft Teams vs Cisco Webex
softwareMicrosoft Teams vs Zoom
softwareSlack vs Zoom
productsSlack vs Google Chat
products
Related Articles
5 articles
- technology
Best Streaming Services in 2026: Top Picks for Every Budget & Interest
Navigating the crowded streaming landscape in 2026 can be overwhelming. We've tested and ranked the best streaming services that offer the most value, from Netflix's massive library to budget-friendly options like Tubi, helping you cut cable and find your perfect entertainment solution.
Read article - technology
Best Live TV Streaming Services & Plans for Spring 2026: Complete Buyer's Guide
Tired of overpaying for cable? Discover the best live TV streaming services and plans for Spring 2026, including YouTube TV's new genre-based packages starting at $55/month. Our comprehensive guide breaks down pricing, channels, and features to help you cut the cord.
Read article - technology
Philo in 2026: Streaming TV Service Review, Pricing & Reddit Community Insights
Explore Philo's evolution heading into 2026, including pricing tiers, channel lineup, and how it compares to competitors like Sling TV. Discover what the r/PhiloTV Reddit community thinks about the service's current offerings and future prospects.
Read article - technology
Best US Fighter Jets 2026: Top American Combat Aircraft Ranked
Discover the most advanced US fighter jets dominating the skies in 2026. From the legendary F-22 Raptor to the versatile F-35 Lightning II, we rank America's best combat aircraft based on performance, stealth, and air superiority capabilities.
Read article - technology
Philo in 2026: Pricing, Lineup & How It Compares to Sling TV
As we head into 2026, Philo continues to position itself as an affordable streaming alternative for cable TV lovers. Discover what Philo offers, how its pricing stacks up against competitors like Sling TV, and what the Reddit community thinks about its future.
Read article
Explore More
Related comparisons and categories