software
Slack vs Teams 2026: Cost, Features, Performance
Microsoft Teams costs significantly less for organizations already using Microsoft 365 (bundled at $6-12.50/user/month vs Slack's $8.25/user/month), while Slack offers superior search functionality, faster message delivery, and a more intuitive interface favored by design-focused teams.
S
Slack
Cloud-based team messaging platform with advanced search and customization.
Design agencies, startups, non-Microsoft tech stacks, teams prioritizing search and UX over cost
Score63%
VS
Microsoft Teams
Unified communications platform bundled with Microsoft 365 productivity suite.
Enterprise Microsoft 365 customers, organizations needing integrated document collaboration, cost-sensitive departments
Score63%
Quick Answer
AI SummaryMicrosoft Teams costs significantly less for organizations already using Microsoft 365 (bundled at $6-12.50/user/month vs Slack's $8.25/user/month), while Slack offers superior search functionality, faster message delivery, and a more intuitive interface favored by design-focused teams.
Our Verdict
AI-assistedChoose Microsoft Teams if your organization uses Microsoft 365, values tight Office document collaboration, and prioritizes cost-effectiveness—Teams' bundled pricing saves 40-60% versus Slack for most enterprises. Choose Slack if you need superior search capabilities, prefer a cleaner interface, work in a non-Microsoft ecosystem, or value faster real-time performance for high-volume communication teams.
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S
Slack
7/10
Microsoft Teams
8/10
S
Choose Slack if
Design agencies, startups, non-Microsoft tech stacks, teams prioritizing search and UX over cost
Choose Microsoft Teams if
Best pickEnterprise Microsoft 365 customers, organizations needing integrated document collaboration, cost-sensitive departments
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Key Differences at a Glance
- Pricing (Annual Per User):✓ Microsoft Teams wins(Free or $6-12.50/year with Microsoft 365 vs $99/year (Pro plan))
- Message Search Speed:✓ Slack wins(Instant indexing across all messages vs 3-month free tier limit, then indexed)
- Free Tier Message History:✓ Microsoft Teams wins(Unlimited with Teams Free vs Last 90 days)
Key Facts & Figures
132 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(apps) | 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) | 2,200+ | — | — |
| 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 | — | — |
| 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(count) | 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(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 | — | — |
| 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(count) | SOC 2, HIPAA, FedRAMP, GDPR | SOC 2, HIPAA, FedRAMP, GDPR, DLP, eDiscovery | |
| Time to Deploy(days) | 3-7 | 1-3 | |
| Uptime Guarantee(%) | 99.99% | 99.9% | |
| Pro Plan Monthly Cost(USD) | $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 | |
| 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% |
Sourced from publicly available data ·
Key Differences
7 attributes compared head-to-head
S
3SlackMicrosoft Teams leads
Slack
Attribute
Microsoft Teams
- $99/year (Pro plan)Pricing (Annual Per User)Free or $6-12.50/year with Microsoft 365(winner)
- Instant indexing across all messages(winner)Message Search Speed3-month free tier limit, then indexed
- Last 90 daysFree Tier Message HistoryUnlimited with Teams Free(winner)
- Basic API integrationMicrosoft 365 IntegrationNative deep integration with Office, OneDrive, SharePoint(winner)
- 4.5/5 stars (ease of use)(winner)User Interface Rating (G2 2024)4.0/5 stars (ease of use)
- <100ms average latency(winner)Message Delivery Speed200-300ms average latency
- 20GB per fileMaximum File Upload Size250GB per file (via OneDrive)(winner)
- Pricing (Annual Per User)
Slack
$99/year (Pro plan)
Microsoft Teams
Free or $6-12.50/year with Microsoft 365(winner)
- Message Search Speed
Slack
Instant indexing across all messages(winner)
Microsoft Teams
3-month free tier limit, then indexed
- Free Tier Message History
Slack
Last 90 days
Microsoft Teams
Unlimited with Teams Free(winner)
- Microsoft 365 Integration
Slack
Basic API integration
Microsoft Teams
Native deep integration with Office, OneDrive, SharePoint(winner)
- User Interface Rating (G2 2024)
Slack
4.5/5 stars (ease of use)(winner)
Microsoft Teams
4.0/5 stars (ease of use)
- Message Delivery Speed
Slack
<100ms average latency(winner)
Microsoft Teams
200-300ms average latency
- Maximum File Upload Size
Slack
20GB per file
Microsoft Teams
250GB per file (via OneDrive)(winner)
Full Comparison
| Attribute | Slack | Microsoft Teams |
|---|---|---|
| Daily Active Users(millions) | ~38 Million | 320 million(winner) |
| App Integrations(count) | 2,600+(winner) | ~700 |
| Google Workspace Native Integration | Limited (requires custom setup) | — |
| Available Integrations(count) | 2,000+ integrations | — |
| Native third-party integrations(count) | 100+ | 500+ apps(winner) |
| Native Microsoft 365 Integration(integration level) | API-based (basic) | Native (deep) |
Show 3 more attributesMicrosoft 365 Integration Depth(integration level) 8+ apps (Outlook, Excel, Word, OneDrive, SharePoint, Project, Planner, Power BI) — Native 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 29 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) $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) 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 — | ||
| Third-party App Integrations(apps) | 2,400+(winner) | 1,000+ |
| Third-party Integrations(integrations) | 2000+ | — |
| Native Integrations Available(count) | 2,200+ | — |
| Native Integrations(integrations) | 2,300+ | — |
| 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 — 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 — AI Assistant Integration(capability) Copilot with GPT-4, speech-to-text, real-time translation — Supported Language Captions(languages) 60+ languages — Breakout Rooms Maximum Count(rooms) 50 breakout rooms — | ||
| 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(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) | — |
| Available Integrations(integrations) | 2000+ | — |
| Third-Party Integrations(count) | 2000+ integrations(winner) | 500+ |
| Pre-built Integrations(count) | 2,400+ integrations | — |
| 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(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 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 | — |
| 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 | — |
| 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 3 more attributesFile Upload Limit(GB) 20GB 250GB 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) |
| Maximum Video Sharing Quality(fps at resolution) | 4K at 30fps | — |
| Free Tier Message History Retention(days) | 90 days | — |
| Enterprise Uptime SLA(percent) | 99.99% | — |
| Uptime SLA Guarantee(%) | 99.99% | — |
| 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 | — |
| 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) | — |
| 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(1-10 scale (1=easiest)) | 2(winner) | 5 |
| User Learning Curve(difficulty rating) | Steep (enterprise-focused interface) | — |
| Uptime Guarantee(%) | 99.99%(winner) | 99.9% |
| Monthly Active Users(users) | 750,000 paid customers | 320 million monthly active users(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 |
| Maximum video call participants (free tier)(people) | 100 participants | — |
| Enterprise app marketplace size(applications) | 2,000+ apps (Slack App Directory) | — |
| 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) | — |
| 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) | — |
| 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) | — |
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 third-party integrations(count)
100+
500+ apps
Native Microsoft 365 Integration(integration level)
API-based (basic)
Native (deep)
Show 3 more attributes
Microsoft 365 Integration Depth(integration level)
8+ apps (Outlook, Excel, Word, OneDrive, SharePoint, Project, Planner, Power BI)
—
Native 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
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)
$8.25 (Pro plan, min 3 users)
—
Base Monthly Cost Per User(USD)
$7.25
—
Business+ Tier Monthly Cost Per User(USD)
$12.50
—
Show 29 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)
$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)
$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)
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
—
Third-party App Integrations(apps)
2,400+
1,000+
Third-party Integrations(integrations)
2000+
—
Native Integrations Available(count)
2,200+
—
Native Integrations(integrations)
2,300+
—
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 31 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)
—
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
—
AI Assistant Integration(capability)
Copilot with GPT-4, speech-to-text, real-time translation
—
Supported Language Captions(languages)
60+ languages
—
Breakout Rooms Maximum Count(rooms)
50 breakout rooms
—
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 5 more attributes
Message 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%
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+
—
Third-Party Integrations(count)
2000+ integrations
500+
Pre-built Integrations(count)
2,400+ integrations
—
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(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 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
—
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
—
File Storage Included(GB)
5GB (Free), varies by plan
—
Free Tier File Storage(GB per user)
1 GB shared workspace
100 GB per user
Message history retention (free plan)(days)
90 days searchable
—
Show 3 more attributes
File Upload Limit(GB)
20GB
250GB
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)
Maximum Video Sharing Quality(fps at resolution)
4K at 30fps
—
Free Tier Message History Retention(days)
90 days
—
Enterprise Uptime SLA(percent)
99.99%
—
Uptime SLA Guarantee(%)
99.99%
—
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
—
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)
—
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)
—
Uptime Guarantee(%)
99.99%
99.9%
Monthly Active Users(users)
750,000 paid customers
320 million monthly active users
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
4.0/5
Maximum video call participants (free tier)(people)
100 participants
—
Enterprise app marketplace size(applications)
2,000+ apps (Slack App Directory)
—
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)
—
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)
—
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)
—
Pros & Cons
10 pros·6 cons across both
S
S
Slack
+5-3
Pros
- Industry-leading message search with instant full-text indexing across all conversations
- Intuitive, aesthetically refined interface with 4.5/5 G2 ease-of-use rating
- Sub-100ms message latency enabling real-time collaboration for fast-paced teams
- 20GB file upload limit and robust third-party app ecosystem (2,000+ integrations)
- Channel-first architecture with granular permission controls for security-focused orgs
Cons
- $99/user/year (Pro) makes it 60% more expensive than Teams for Microsoft 365 subscribers
- Limited native integration with enterprise systems compared to Microsoft's ecosystem
- Free tier only retains last 90 days of messages, requiring paid upgrade for history
Microsoft Teams
+5-3
Pros
- Included free in Microsoft 365 subscriptions ($6-12.50/user/month), eliminating standalone costs
- Native integration with Word, Excel, PowerPoint, OneDrive, and SharePoint for seamless doc collaboration
- Unlimited message history on Teams Free tier, no paywall for conversation archival
- 250GB per-file upload limit via OneDrive integration exceeds Slack's 20GB
- Meeting capability with up to 300 participants included, reducing need for separate video tools
Cons
- 200-300ms message latency creates noticeable delays in real-time fast-paced conversations
- Search functionality limited to 3 months free; older messages require indexing before searchability
- Interface rated 4.0/5 on G2 with more cluttered UX due to feature density and Microsoft legacy design patterns
Frequently Asked Questions
5 questions
Teams is substantially cheaper for organizations using Microsoft 365. If you're already paying for Microsoft 365 ($6-12.50/user/month), Teams is bundled at no additional cost. Slack's Pro plan costs $8.25/user/month standalone, making Teams 60-100% cheaper for Microsoft shops. However, for non-Microsoft environments or teams that don't use Office 365, both tools cost similarly.
Resources & Learn More
Curated sources to dive deeper
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