[Mattermost](https://mattermost.com) is an open core, self-hosted collaboration platform that offers chat, workflow automation, voice calling, screen sharing, and AI integration. This repo is the primary source for core development on the Mattermost platform; it's written in Go and React, runs as a single Linux binary, and relies on PostgreSQL. A new compiled version is released under an MIT license every month on the 16th.
[Deploy Mattermost on-premises](https://mattermost.com/deploy/?utm_source=github-mattermost-server-readme), or [try it for free in the cloud](https://mattermost.com/sign-up/?utm_source=github-mattermost-server-readme).
<imgwidth="1006"alt="mattermost user interface"src="https://user-images.githubusercontent.com/7205829/136107976-7a894c9e-290a-490d-8501-e5fdbfc3785a.png">
- [Product documentation](https://docs.mattermost.com/) - Learn how to run a Mattermost instance and take advantage of all the features.
- [Developer documentation](https://developers.mattermost.com/) - Contribute code to Mattermost or build an integration via APIs, Webhooks, slash commands, Apps, and plugins.
- [Download and Install Mattermost Self-Hosted](https://docs.mattermost.com/guides/deployment.html) - Deploy a Mattermost Self-hosted instance in minutes via Docker, Ubuntu, or tar.
- [Developer machine setup](https://developers.mattermost.com/contribute/server/developer-setup) - Follow this guide if you want to write code for Mattermost.
In addition to the web interface, you can also download Mattermost clients for [Android](https://mattermost.com/pl/android-app/), [iOS](https://mattermost.com/pl/ios-app/), [Windows PC](https://docs.mattermost.com/install/desktop-app-install.html#windows-10-windows-8-1), [macOS](https://docs.mattermost.com/install/desktop-app-install.html#macos-10-9), and [Linux](https://docs.mattermost.com/install/desktop-app-install.html#linux).
[<img src="https://user-images.githubusercontent.com/30978331/272826427-6200c98f-7319-42c3-86d4-0b33ae99e01a.png" alt="Get Mattermost on Google Play" height="50px"/>](https://mattermost.com/pl/android-app/) [<img src="https://developer.apple.com/assets/elements/badges/download-on-the-app-store.svg" alt="Get Mattermost on the App Store" height="50px"/>](https://itunes.apple.com/us/app/mattermost/id1257222717?mt=8) [](https://docs.mattermost.com/install/desktop.html#windows-10-windows-8-1-windows-7) [](https://docs.mattermost.com/install/desktop.html#macos-10-9) [](https://docs.mattermost.com/install/desktop.html#linux)
Receive notifications of critical security updates. The sophistication of online attackers is perpetually increasing. If you're deploying Mattermost it's highly recommended you subscribe to the Mattermost Security Bulletin mailing list for updates on critical security releases.
- [Join Developer Discussion on a Mattermost server for contributors](https://community.mattermost.com/signup_user_complete/?id=f1924a8db44ff3bb41c96424cdc20676)
- **Email** - Subscribe to our [newsletter](https://mattermost.us11.list-manage.com/subscribe?u=6cdba22349ae374e188e7ab8e&id=2add1c8034) (1 or 2 per month).
[Join the Mattermost Contributors server](https://community.mattermost.com/signup_user_complete/?id=codoy5s743rq5mk18i7u5ksz7e) to join community discussions about contributions, development, and more.
