Microsoft Teams is a cloud-based enterprise collaboration platform with 300+ million users and deep Office 365 integration, while Mattermost is an open-source, self-hosted alternative offering greater control and privacy for organizations avoiding vendor lock-in.
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. Source Code Access. Active Monthly Users. Office 365 Integration. Starting Cost (Monthly). Data Residency Control. Maximum File Upload Size
Choose Microsoft Teams if your organization uses Office 365/Microsoft 365, requires maximum integration with enterprise tools, and prioritizes ease of deployment and vendor support. Choose Mattermost if you need self-hosted control, open-source transparency, HIPAA/FedRAMP compliance requirements, or want to avoid vendor lock-in and reduce per-user licensing costs.
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.
Can I self-host Microsoft Teams on my own servers?
No, Microsoft Teams is cloud-only (SaaS) and cannot be self-hosted. Microsoft does not offer on-premises deployment. If data residency and self-hosting are requirements, Mattermost is the appropriate alternative.
Is Mattermost compatible with Microsoft Office files?
Mattermost can preview Office files (.docx, .xlsx, .pptx) through integrations but does not have native collaborative editing like Teams does with Office 365. For organizations requiring real-time co-authoring of Office documents, Teams is superior.
What's the total cost difference for a 500-person company over 3 years?
Teams: $72,000-225,000 (at $4-12.50/user/month). Mattermost self-hosted: minimal cost (infrastructure only, estimated $15,000-30,000 for IT ops). Mattermost managed cloud: $58,500. Self-hosted Mattermost saves 70-80% but requires IT resources.
Which is better for healthcare/compliance requirements (HIPAA, FedRAMP)?
Mattermost is superior for compliance because self-hosting gives full control over data location, encryption, and audit trails. Teams requires trusting Microsoft's compliance certifications and data residency offerings, which are limited to a few regions.
Can I switch from Teams to Mattermost without losing message history?
Message migration is possible but requires technical work—Teams' export functionality is limited, and manual migration scripts are needed. Mattermost provides some import tools, but expect 10-20 hours of IT effort for 1,000+ users. Most organizations run parallel systems during transition.
How to Choose Between Microsoft Teams and Mattermost
Deployment Model: Microsoft Teams has Cloud-only (SaaS), while Mattermost has Self-hosted or cloud.
Source Code Access: Microsoft Teams has Proprietary, closed-source, while Mattermost has Open-source (AGPL v3).
Active Monthly Users: Microsoft Teams has 300+ million, while Mattermost has 500,000+ deployments.
Office 365 Integration: Microsoft Teams has Native, seamless integration, while Mattermost has Limited third-party plugins.
Starting Cost (Monthly): Microsoft Teams has $4-12.50 per user, while Mattermost has $0 (open-source), $39/user/month (managed).
Data Residency Control: Microsoft Teams has Limited regional options, while Mattermost has Full control with self-hosting.
Maximum File Upload Size: Microsoft Teams has 2 GB per file, while Mattermost has 100+ GB (configurable).