Mattermost is an open source, self-hosted Slack-alternative from https://mattermost.org.

It's written in Golang and React and runs as a single Linux binary with MySQL or Postgres. Every month on the 16th a new compiled version is released under an MIT license.

• Review product documentation.
• Download compiled version.

Try out Mattermost:

• Join the Mattermost Contributor's server (latest nightly builds, unstable)
• Join the Mattermost Demo server (latest stable version)

Deploy on Heroku

Note: Heroku preview does not include email or persistent storage

Install on your own machine:

• One-line Docker Preview
• Developer Machine Setup
• Production Install Guides using Linux Binary
• Production Docker Install

Get Involved:

• Contribute Code
• Find "Help Wanted" projects
• Join Developer Discussion on a Mattermost Server for contributors
• File Bugs
• Share Feature Ideas
• Get Troubleshooting Help

Learn More:

• API Options - webhooks, slash commands, drivers and web service
• Localization Guide

Get the Latest News:

• Twitter - Follow MattermostHQ
• Email - Subscribe to our newsletter (1 or 2 per month)
• IRC - Join us on #matterbridge (thanks to matterircd)

Any other questions, mail us at [email protected]. We’d love to meet you!