Microsoft Teams is a feature-rich enterprise collaboration platform with 320+ million users and deep Microsoft 365 integration, while Mattermost is an open-source, self-hosted alternative offering greater control and lower licensing costs for organizations prioritizing data sovereignty and customization.
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 99.9% SLA, and require seamless Office document collaboration and video conferencing at scale. Choose Mattermost if you prioritize data sovereignty, need full source code control, require on-premise deployment for compliance reasons, or want to minimize licensing costs while maintaining significant customization capabilities.
Enterprise cloud-based collaboration platform with 320M users, integrated with Microsoft 365 and Office applications.
Open-source, self-hosted team collaboration platform designed for organizations requiring data control and customization.
Microsoft Teams vs Mattermost — Comparison Data
Structured comparison data for Microsoft Teams vs Mattermost with 181 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.
Can I host Mattermost on my own servers?
Yes, Mattermost is designed for on-premise deployment. You can download the open-source version and run it on your own infrastructure, giving you complete control over data residency, security, and customization. Mattermost also offers managed cloud hosting if you prefer not to manage infrastructure yourself.
Does Mattermost work with Microsoft Office documents like Teams does?
Mattermost can integrate with Office 365 via third-party integrations and webhooks, but it doesn't have the deep native integration that Teams provides. You can share Office files and link to SharePoint, but collaborative editing within Mattermost is limited. For heavy Office 365 users, Teams remains superior.
How much does it cost to run Mattermost for 1,000 employees?
Mattermost's professional tier costs approximately $10-20 per user per month, totaling $10,000-20,000 annually for 1,000 users. However, the open-source community edition is free—you only pay for server hosting, infrastructure, and internal IT support. With Teams, expect $6,000-12,000 annually for the same user count.
Both are secure for different reasons. Teams offers Microsoft's massive security infrastructure, advanced threat protection, and compliance certifications (SOC 2, HIPAA, GDPR). Mattermost's open-source code allows organizations to audit security themselves and deploy on isolated networks. Neither is objectively 'more secure'—it depends on your threat model and compliance needs.
Can I export my data from Teams or Mattermost if I want to switch?
Teams allows data export through Microsoft's Data Subject Right tools, but the process is complex and time-consuming. Mattermost's open-source nature makes data portability straightforward—your data is in standard formats and can be exported easily. If vendor lock-in is a concern, Mattermost is significantly more flexible.