What is Mattermost?

Mattermost is an open source Slack alternative. It’s written in Golang and React and runs as a single Linux binary with MySQL or PostgreSQL.

Workflow

• Deploy faster by connecting people, files and systems with workflow
• Resolve incidents and outages in a trusted, private workspace
• Integrates securely with most popular DevOps tools (CI/CD, Bots, Git)
• Highly customizable down to the interface—control the experience

Why Uber switched from Slack to Mattermost for enterprise collaboration?

Uber needed an enterprise messaging solution that could scale to meet its needs: massive collaboration from tens of thousands of concurrent users across web, PC and phones, plus extensive workflow integration and automation, all with zero downtime. Slack couldn’t scale. Other messaging platforms weren’t secure. Ultimately, Uber created its own solution, “uChat”, using Mattermost as the open source platform to achieve its objectives.

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Usefull Link

• Mattermost
• Docs
• Demo
• Mattermost vs Slack/