Microsoft Teams is a cloud-based enterprise collaboration platform with 320+ million monthly active users integrated into Microsoft 365, while Mattermost is a self-hosted open-source alternative offering greater control and privacy. Teams dominates the market with broader integrations; Mattermost appeals to organizations requiring data sovereignty and deployment flexibility.
Microsoft Teams vs Mattermost — Side-by-side comparison on A Versus B
Enterprise collaboration platform integrated with Microsoft 365 suite, offering messaging, video calls, and Office app integration.
Open-source, self-hosted team collaboration platform with enterprise security controls
Deployment Model. Monthly Active Users. Source Code. Base Price (per user/month). Microsoft 365 Integration. Data Sovereignty Control. Number of Native Integrations
Choose Microsoft Teams if you're already invested in Microsoft 365, need enterprise-grade reliability with minimal setup, and prioritize feature breadth and integration depth. Choose Mattermost if you require self-hosted deployment, open-source transparency, data sovereignty control, or operate in regulated industries with strict data residency requirements.
Microsoft Teams: 320 million | Mattermost: N/A
Microsoft Teams: Included with M365 | Mattermost: N/A
Microsoft Teams: No, paid only | Mattermost: N/A
Microsoft Teams: Full native integration | Mattermost: N/A
Microsoft Teams: Often requires app/account | Mattermost: N/A
Microsoft Teams: 10,000 | Mattermost: N/A
Microsoft Teams: 60 minutes | Mattermost: N/A
Microsoft Teams: 50 rooms | Mattermost: N/A
Microsoft Teams: $6/month (Microsoft 365 bundle) | Mattermost: N/A
Microsoft Teams: Limited translation features | Mattermost: N/A
Microsoft Teams: $6.00 (with Microsoft 365 Business Basic) | Mattermost: N/A
Microsoft Teams: $72 (bundled pricing) | Mattermost: N/A
Microsoft Teams: 1,000+ | Mattermost: N/A
Microsoft Teams: Up to 10,000 | Mattermost: N/A
Microsoft Teams: Native with SharePoint, OneDrive, Office Web Apps | Mattermost: N/A
Microsoft Teams: Microsoft Copilot Pro (enterprise AI, meeting insights) | Mattermost: N/A
Microsoft Teams: 2-4 seconds average | Mattermost: 0.5-1 second average
Microsoft Teams: $6 (Teams Essentials) | Mattermost: N/A
Maximum Free Tier Group Meeting Duration
Microsoft Teams: 24 hours | Mattermost: N/A
Microsoft Teams: 100 participants | Mattermost: N/A
Microsoft Teams: Premium only ($10/user/month) | Mattermost: N/A
Microsoft Teams: 8+ apps (Outlook, Excel, Word, OneDrive, SharePoint, Project, Planner, Power BI) | Mattermost: N/A
Advanced Chat Features (Channels, Threading, Workflows)
Microsoft Teams: Advanced (channels, nested threads, queues, connectors) | Mattermost: N/A
Microsoft Teams: 4.5 stars | Mattermost: N/A
Microsoft Teams: 3,669 reviews | Mattermost: N/A
3-Year Total Cost of Ownership (1,000 users)
Microsoft Teams: Lower (integrated M365) | Mattermost: N/A
Microsoft Teams: 3,668 reviews | Mattermost: N/A
Microsoft Teams: 7.9% positive | Mattermost: N/A
Microsoft Teams: Limited to basic captions | Mattermost: N/A
Microsoft Teams: Basic transcription only | Mattermost: N/A
Microsoft Teams: Third-party device support only | Mattermost: N/A
Microsoft Teams: 1,000+ participants | Mattermost: N/A
Microsoft Teams: $4.50 | Mattermost: N/A
Microsoft Teams: Limited (Copilot requires E5) | Mattermost: N/A
Microsoft Teams: 4K at 30fps | Mattermost: N/A
Microsoft Teams: 31 languages | Mattermost: N/A
Enterprise Deployment Adoption (500+ seat orgs)
Microsoft Teams: 67% of deployments | Mattermost: N/A
3-Year TCO Advantage for 1,000 Users with M365
Microsoft Teams: 47% lower cost | Mattermost: N/A
Microsoft Teams: $7.00 (Business Basic 2026 price) | Mattermost: N/A
Microsoft Teams: 300+ participants | Mattermost: N/A
Microsoft Teams: Excellent (optimized for reliability) | Mattermost: N/A
Microsoft Teams: 4K (3840x2160) | Mattermost: N/A
Microsoft Teams: 40+ languages (Teams Premium) | Mattermost: N/A
Microsoft Teams: Steep (enterprise-focused interface) | Mattermost: N/A
Microsoft Teams: 350+ million monthly active users | Mattermost: N/A
Microsoft Teams: ISO 27001, SOC 2, HIPAA, GDPR | Mattermost: N/A
Microsoft Teams: 1080p (1920x1080) | Mattermost: N/A
Microsoft Teams: 60 minutes (group calls) | Mattermost: N/A
Microsoft Teams: $6.50 or free with Microsoft 365 | Mattermost: N/A
Microsoft Teams: Unlimited (OneDrive) | Mattermost: N/A
Microsoft Teams: Full (Word, Excel, PowerPoint, Outlook) | Mattermost: N/A
Microsoft Teams: Copilot Pro required ($20+ per tenant) | Mattermost: N/A
Microsoft Teams: Windows, Mac, iOS, Android, Web | Mattermost: N/A
Microsoft Teams: 4.5 Mbps | Mattermost: N/A
Microsoft Teams: 320 million | Mattermost: ~0.3 million
Microsoft Teams: $0 (Free) or $6 (Standard) | Mattermost: $0 (self-hosted) or $10 (cloud)
Microsoft Teams: 500+ apps | Mattermost: 400+ plugins
Microsoft Teams: 10,000 participants | Mattermost: Up to 1,000 (with Jitsi)
Microsoft Teams: Cloud-only (SaaS) | Mattermost: Self-hosted, cloud, or hybrid
Microsoft Teams: Proprietary (closed-source) | Mattermost: Open-source (Apache 2.0)
Microsoft Teams: Copilot with GPT-4, speech-to-text, real-time translation | Mattermost: Limited AI features, plugin-based integration possible
Microsoft Teams: Microsoft-managed regional datacenters (limited control) | Mattermost: Full control with self-hosted deployment
Microsoft Teams: 10000 | Mattermost: N/A
Microsoft Teams: unlimited | Mattermost: N/A
Microsoft Teams: SOC 2, HIPAA, FedRAMP, GDPR, DLP, eDiscovery | Mattermost: N/A
Microsoft Teams: 99.9% | Mattermost: N/A
Microsoft Teams: 360 million | Mattermost: N/A
Microsoft Teams: 100 GB per user | Mattermost: N/A
Microsoft Teams: 90 days | Mattermost: N/A
Annual Subscription Cost (Pro, 100 users)
Microsoft Teams: $7,800 or free with Microsoft 365 | Mattermost: N/A
Microsoft Teams: 450 MB | Mattermost: N/A
Microsoft Teams: 50-100ms | Mattermost: N/A
Microsoft Teams: 60 minutes (100 participants max) | Mattermost: N/A
Microsoft Teams: $6.00 | Mattermost: N/A
Microsoft Teams: 30fps | Mattermost: N/A
Microsoft Teams: 60+ languages | Mattermost: N/A
Microsoft Teams: Limited (fixed structure) | Mattermost: N/A
Free Tier Meeting Duration for Group Calls
Microsoft Teams: 60 minutes (unlimited participants) | Mattermost: N/A
Microsoft Teams: $70/year (via Microsoft 365 Business Basic) | Mattermost: N/A
Microsoft Teams: 300 participants | Mattermost: N/A
Microsoft Teams: 5 GB (OneDrive) | Mattermost: N/A
Microsoft Teams: 50 breakout rooms | Mattermost: N/A
Global Enterprise Video Conferencing Market Share (2024)
Microsoft Teams: 28.2% | Mattermost: N/A
Microsoft Teams: Native: Word, Excel, SharePoint, OneDrive, Outlook, Power BI | Mattermost: N/A
Monthly Subscription Cost (Pro/Standard)
Microsoft Teams: $0 (bundled) or $12.50 (standalone) | Mattermost: N/A
Microsoft Teams: 200-300ms | Mattermost: N/A
Microsoft Teams: Last 3 months only | Mattermost: N/A
Microsoft Teams: 250GB | Mattermost: N/A
Microsoft Teams: Unlimited | Mattermost: N/A
Microsoft Teams: Native (deep) | Mattermost: N/A
Microsoft Teams: 4.0/5 | Mattermost: N/A
Microsoft Teams: 300+ million users | Mattermost: 500,000+ deployments
Microsoft Teams: $4.00 (Teams Essentials) - $12.50 (Teams Premium) | Mattermost: $0 (open-source) - $39/month (Mattermost Cloud)
Microsoft Teams: 2 GB per file | Mattermost: 100+ GB (configurable)
Microsoft Teams: 1,000+ native integrations | Mattermost: 120+ integrations (community-contributed)
Microsoft Teams: Proprietary closed-source | Mattermost: AGPL v3 open-source
Microsoft Teams: Cloud-only SaaS | Mattermost: Full self-hosted + cloud managed options
Annual TCO (1,000 users, 3-year average)
Microsoft Teams: $48,000-150,000 | Mattermost: $0 (self-hosted) or $39,000 (managed cloud)
Microsoft Teams: 1000 (1TB OneDrive) | Mattermost: N/A
Maximum Video Conference Participants (Free)
Microsoft Teams: 1000+ | Mattermost: N/A
Microsoft Teams: 4.1/5 (8,300 reviews) | Mattermost: N/A
Microsoft Teams: Basic keyword search (limited free tier) | Mattermost: N/A
Microsoft Teams: N/A | Mattermost: $10.00
Microsoft Teams: N/A | Mattermost: $18.00
Microsoft Teams: N/A | Mattermost: Self-hosted, on-premise, cloud
Microsoft Teams: N/A | Mattermost: Full control with self-hosting option
Microsoft Teams: N/A | Mattermost: Stable
Microsoft Teams: N/A | Mattermost: Yes, fully open-source
Microsoft Teams: N/A | Mattermost: Basic automation and workflows
How to choose between Microsoft Teams and Mattermost
Microsoft Teams vs Mattermost — Structured Comparison Data
Machine-readable comparison dataset for Microsoft Teams vs Mattermost. Contains 127 attribute comparisons, 5 FAQ pairs.
Microsoft Teams vs Mattermost — Attribute Category Vocabulary
Taxonomy of attribute categories used to classify comparison data for Microsoft Teams vs Mattermost.
Mattermost can replace Teams for core messaging and collaboration needs, but Teams' advantages are significant: seamless Microsoft 365 integration (Outlook, SharePoint, OneDrive), larger participant video calls (10,000 vs 1,000), and built-in AI features via Copilot. Mattermost excels if you prioritize data sovereignty, open-source transparency, and cost control. For organizations heavily invested in Microsoft products, migration may not be cost-effective.
Yes, Mattermost's self-hosted version is permanently free with no user limits under the Apache 2.0 license. However, free doesn't mean cost-free: you need in-house IT resources for server setup, SSL certificates, security updates, and maintenance. Organizations typically estimate $2,000-$10,000 annually in infrastructure and labor costs. Mattermost Cloud (managed hosting) starts at $10 per user/month.
Which is more secure: Teams or Mattermost?
Both are secure, but differently. Teams offers enterprise-grade security (SOC 2 Type II, HIPAA, ISO 27018) with Microsoft's resources defending against threats. Mattermost's self-hosted model provides security through transparency: you audit the open-source code, control data location, and don't rely on third-party cloud infrastructure. For GDPR compliance and data residency requirements, Mattermost self-hosted offers superior control. For vulnerability management and zero-day protection, Teams' enterprise resources win.
Teams supports up to 10,000 participants with native HD recording, real-time transcription, and Copilot meeting summaries. Mattermost integrates with Jitsi (open-source) supporting ~1,000 participants with lower transcription features. Teams is superior for large webinars and enterprise meetings. Mattermost suffices for team calls but requires additional tools for large events. Teams also offers superior meeting intelligence and Copilot-powered insights.
What are total cost differences for 500 employees?
Microsoft Teams Standard: 500 users × $12.50/month = $75,000 annually (plus potential Microsoft 365 licensing at $5-22/user). Mattermost self-hosted: ~$0 software + estimated $5,000-$15,000 annual IT maintenance. Mattermost Cloud: 500 × $10 = $60,000 annually. Mattermost is cheaper, but Teams' integration value may justify the cost for existing Microsoft 365 customers. Break-even occurs if you already pay for Microsoft 365 ($2,500-$11,000 for 500 users).
How to Choose Between Microsoft Teams and Mattermost
Deployment Model: Microsoft Teams has Cloud-only (SaaS), while Mattermost has Self-hosted or cloud.
Monthly Active Users: Microsoft Teams has 320 million (2024), while Mattermost has 300,000+ estimated.
Source Code: Microsoft Teams has Proprietary, while Mattermost has Open-source (Apache 2.0).
Base Price (per user/month): Microsoft Teams has $6 (Teams Free) - $12.50 (Standard), while Mattermost has Free (self-hosted) - $10 (cloud).
Microsoft 365 Integration: Microsoft Teams has Native seamless integration, while Mattermost has Limited third-party integration.
Data Sovereignty Control: Microsoft Teams has Limited (Microsoft-managed), while Mattermost has Complete (self-hosted option).
Number of Native Integrations: Microsoft Teams has 500+ apps, while Mattermost has 400+ integrations via plugins.