Mattermost

Mattermost is a secure, open-source platform for communication, collaboration, and workflow orchestration across tools and teams. As an alternative to proprietary SaaS messaging, Mattermost consolidates all your team communications in one place, making them searchable and accessible from anywhere. Written in Golang and React, it operates under the MIT license as a production-ready Linux binary running with MySQL or Postgres. Mattermost is: Slack-compatible, not Slack-limited – Mattermost offers features on par with Slack and supports a superset of Slack’s incoming and outgoing webhook integrations, including compatibility with existing Slack integrations. You can import users, public channel history, and even theme color settings from an existing Slack team into Mattermost. Beyond the web, mobile and desktop apps – Use Mattermost on iOS or Android phones and tablets, or via installed applications on Windows, Linux, and Mac. Easy to deploy, manage, and upgrade – Mattermost runs as a Linux binary, Docker image, and in many other forms. Try a one-line Docker installation for Mattermost, with numerous setup guides available. Improvements ship monthly. Supported by a vibrant community – Use Mattermost with dozens of community integrations and apps, including Jira, IRC, XMPP, Hubot, Giphy, Jenkins, GitLab, Trac, Redmine, SVN, RSS/Atom, and more. Build and share your own apps using the Mattermost API and drivers.

Mattermost is a secure, open-source platform designed to enhance team communication, collaboration, and workflow orchestration. It centralizes all team interactions in one place, making them searchable and accessible anytime, anywhere, particularly suited for accelerating mission-critical workflows.