Mattermost

Mattermost is the secure collaboration platform for mission-critical work in defense, government, and critical infrastructure. Trusted by the U.S. Department of Defense and Fortune 500s, our open core platform powers focused, adaptable, secure, resilient, operations across the most demanding environments. The platform supports MissionOps, DevSecOps, and Cyber and Defense with secure messaging, file sharing, audio, screen sharing, workflow automation, and AI assistance—available in self-hosted and single-tenant SaaS deployments. Built on an open core and shaped by 4,000+ contributors, Mattermost is co-developed with the world’s top security experts to meet the most demanding operational needs. Learn more at mattermost.com.