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Menu Skip to content Docs Features Feature List What Slack might learn from its Open Source alternative Apps & Integrations Blog in the News Contribute Share your project How to Contribute Community Forums Feature Suggestions Report a Bug Build an Integration Team Merchandise Enterprise Download Current Stable Release Install Guides Security Updates Native Apps Search for: Homepage is an open source, self-hosted Slack-alternative As an alternative to proprietary SaaS messaging, brings all your team communication into one place, making it searchable and accessible anywhere. It’s written in Golang and React and runs as a production-ready Linux binary under an MIT license with either MySQL or Postgres. is: Slack-compatible, not Slack-limited – features rival Slack features, and support a superset of Slack’s incoming and outgoing webhook integrations, including compatibility with existing Slack integrations. From your existing Slack teams, you can import users, public channel history and even theme setting colors into . Mobile and desktop apps, in addition to web – Use from your iOS or Android phones and tablets or with installed apps on Windows, Linux and Mac. Easy to deploy, manage, and upgrade – runs as Linux binary, Docker image, and many other forms. Try with a one-line Docker install , and many install guides are available . Improvements ship every two months. Supported by a vibrant community – Use with dozens of community integrations and applications , including Jira, IRC, XMPP, Hubot, Giphy, Jenkins, GitLab, Trac, Redmine, SVN, RSS/Atom and many others. Build and share your own apps using APIs and drivers . Also see: 10 reasons why is better than Slack BONUS: Sign-up for the Insiders mailing list and we’ll send you an upcoming article on How to integrate over 400 applications to –including Jira, Github and Twitter–using Zapier integration. Subscribe to our mailing list Like what you see? Star us on GitHub! Manifesto Why we made Feature List Documentation Download Install Guides Native Apps Integrations Tweets by @mattermost Recent Posts 3.5 improves mobile and web performance, adds Minio support, Russian language Open source Slack-alternative integrates 700 apps with Markdown support ( 3.4) 3.2: German, Custom Emoji, Exchange & XMPP integrations, Windows & Mac Apps and more 3.1: Apple Watch & notification upgrades, shortcuts, compact view and more 3.0: Multi-Team Accounts, Japanese, Mobile & Desktop Upgrades, Integrations for Outlook, Ruby & Rust About Vision Why we made Release Schedule Product Roadmap Careers Company Security Updates Security Update Mailing List Merchandise Community Apps & Integrations Forum Filing Bugs Contributing Feature Proposals Upvote Feature Proposals Brand Guidelines Stack Overflow Follow Us Twitter Github Email Download Current Stable Release Install Guides Feature List Contribute Code Contribution Guidelines Experience Design Principles Documentation Guidelines Responsible Disclosure Policy Contributor List Special Thanks © Copyright 2015 , Inc....