Mattermost vs. Microsoft Teams Learn why mission-focused teams choose Mattermost for high security, high availability collaboration. Mattermost Software Type Deployment Compliance and Data Access Flexibility and Extensibility Usability Mobile Impact Levels Open source On-premise and private cloud Your data stays in your hands Fully customizable and extensible Designed for technical team workflows Customizable Can be deployed at any Impact Level Source code is publicly available and supported by community contributors. Deploy on-premise behind your firewall. No FedRAMP required. All data can be backed up and exported. Extensible through various existing and custom plugins. Best suited for developers and mission- focused team collaboration. Proprietary software Publicly-hosted SaaS Data managed by Microsoft Limited extensibility; additional purchases required Designed for general collaboration Not customizable Only deployed at IL5 and GCC High Source code is not publicly not available. No on-prem or private-cloud option. FedRAMP required. Requires FedRAMP to implement compliance and retention policies. Extensible through prebuilt apps; some require additional purchases. Best suited for general collaboration for day- to-day activities. Microsoft Teams Government Solutions Choose your deployment option Unite your people, tools, and processes. Secure, open-source, and made for developers. Get started for free with Mattermost Cloud or Self-Hosted » Supports chat and voice calls (beta) for a single server, no plugins or file management. Customize via API. Video calls, calendar views, chat, integrated cloud storage, dashboards, support for multiple team accounts, etc. No ability to customize the mobile app.