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Mattermost is an open source, private cloud, Slack-alternative from https://mattermost.com.

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

• Review product documentation.
• Review developer documentation.
• Download compiled version.

Try out Mattermost

• Join the Mattermost Contributor's server to join community discussions about contributions, development and more
• Join the Mattermost Demo server to try out Mattermost and explore sample use cases

Deploy on Heroku

Note: Heroku preview does not include email or persistent storage

Deploy on a Cloud Platform via Bitnami

Auto-deploy Mattermost to Amazon Web Services, Azure, Google Cloud Platform, or Oracle Cloud Platform via Bitnami.

Install on Your Own Machine

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

Native Mobile and Desktop Apps

In addition to the web interface, you can also download Mattermost clients for Android, iOS, Windows PC, Mac OSX, and Linux.

Get Security Bulletins

Receive notifications of critical security updates. The sophistication of online attackers is perpetually increasing. If you are deploying Mattermost it is highly recommended you subscribe to the Mattermost Security Bulletin mailing list for updates on critical security releases.

• Subscribe here

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
• Help translate Mattermost

Learn More

• API Options - webhooks, slash commands, drivers and web service
• See who's using Mattermost
• Browse over 700 Mattermost integrations

Get the Latest News

• Twitter - Follow Mattermost
• Blog - Get the latest updates from the Mattermost blog.
• Email - Subscribe to our newsletter (1 or 2 per month)
• Mattermost - Join the ~contributors channel on the Mattermost Community Server.
• IRC - Join the #matterbridge channel on Freenode (thanks to matterircd).

Any other questions, mail us at info@mattermost.com. We’d love to meet you!