Mattermost Team Edition is an open source messaging and communication application.

• Centralize DevOps communication and workflow: Build intuitive workflows and collaborate across large teams without worrying about security or data privacy. Get up and running quickly with hundreds of existing integrations from Mattermost and the community, then build out custom workflows that scale to tens of thousands of concurrent users.
• Collaborate securely and privately, enterprise-wide: Many of the world's leading high-security enterprises work better with Mattermost by connecting people, tools, and automation across tens of thousands of users.
• Mattermost is a Gartner Cool Vendor: Mattermost is cool because it gives buyers visibility into the code and enables deeper customization to match exact business models and needs.