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
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.
All-in-one workplace collaboration platform with video, chat, and Office integration
Open-source, self-hosted team collaboration platform with enterprise security controls
Microsoft Teams vs Mattermost — Comparison Data
Structured comparison data for Microsoft Teams vs Mattermost with 149 attributes.
Maximum Free Tier Group Meeting Duration
Advanced Chat Features (Channels, Threading, Workflows)
3-Year Total Cost of Ownership (1,000 users)
Enterprise Deployment Adoption (500+ seat orgs)
3-Year TCO Advantage for 1,000 Users with M365
Annual Subscription Cost (Pro, 100 users)
Free Tier Meeting Duration for Group Calls
Global Enterprise Video Conferencing Market Share (2024)
Monthly Subscription Cost (Pro/Standard)
Annual TCO (1,000 users, 3-year average)
Maximum Video Conference Participants (Free)
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).