Mattermost - Self-hosted Team Communication Service

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle. It is as an alternative to proprietary SaaS messaging, Mattermost brings all your team communication into one place, making it searchable and accessible anywhere.

Mattermost is the only all-in-one solution for developers to collaborate without sacrificing security. Its integrated platform is designed around Channel-based collaboration that connects your people, processes, and tools. Kanban-style Boards make managing projects easier than ever, while Playbooks provide prescribed workflows that drive reliable and repeatable outcomes based on your team’s processes.