High trust collaboration for your enterprise
Mattermost is an open source collaboration tool for developers.

Collaborate securely and privately, enterprise-wide
Many of the world’s leading privacy-conscious enterprises work better with Mattermost by connecting people, tools, and automation to increase collaboration.
- Flexible deployment model: Self-hosted or SaaS
- Enterprise-grade security and privacy for full control of data
- Works seamlessly with enterprise security, identity, and compliance systems
Mattermost enables DevOps workflows
DevOps teams use Mattermost to power collaboration at every stage of the DevOps lifecycle. Mattermost unifies people, tools, processes, and automation to help your team increase innovation and agility.
Learn howThe open source advantage
Mattermost is the leading open source collaboration platform with a thriving community. It's written in Golang and React and runs as a single Linux binary with MySQL or PostgreSQL. Use the features you like, for example, file sharing, real-time group chat, and webhooks, with full access to source code.