Mattermost

Active

Secure Collaboration for Technical Teams

Summer 2012Founded 2016120 peoplePalo Alto, CA, USA; Remote

mattermost.com ↗LinkedIn ↗X ↗GitHub ↗Crunchbase ↗See on the Idea Map B2B momentum

About

Mattermost provides secure collaboration for technical and operational teams that work in environments with complex nation-state level security and trust requirements. We serve technology, public sector, national defense and financial services industries with customers ranging from tech giants, to the world’s largest banks, to the U.S. Department of Defense and governmental agencies around the world. Our self-hosted and cloud offerings provide team messaging, file sharing, integrations, audio and screen share, workflow automation and project management on an open source platform deployed by the world’s most secure and mission critical organizations. We co-build the future of collaboration with over 4,000 open source project contributors who’ve provided over 30,000 code improvements towards our shared product vision, which is translated into 20 languages.

From their website

as of Jun 7, 2026mattermost.com ↗

SaaS

Mattermost provides a secure collaboration platform designed for mission-critical work, focusing on self-hosted and adaptable deployment with strong security and integration capabilities for government, defense, and critical infrastructure contexts.

Mattermost offers a collaboration platform with features like mission-critical chat, playbooks, extensive integrations, native audio calling, and self-sovereign collaboration. It supports self-hosted, private cloud, and high-availability deployments, integrates with a range of tools, and provides industry-specific playbooks and secure operations workflows (e.g., integrated security operations, out-of-band incident response, real-time DevSecOps collaboration). It emphasizes controllable data, compliance, and adaptable deployment to air-gapped or private environments.

Who it’s for: Governments, critical infrastructure, defense and national security, global public sector, enterprises requiring on-prem or air-gapped deployments and strong security/compliance postures.

Features

Self-hosted and private cloud deployment
Integrated security operations and incident response workflows
Playbooks for automated collaboration
Native audio calling and real-time DevSecOps collaboration
Extensive integrations with mission-critical tools
Self-sovereign collaboration and data control
Industry-specific compliance and governance features

Mention of government, defense, and critical infrastructure deployments; references to customers, partnerships, and regional specialists imply traction and enterprise focus.