Surely you know Slack, well, there is an open source and self-hosted alternative known as Mattemost. An instant messaging application that is offered as a cloud service (SaaS) and that will allow you to perform searches and access them from anywhere. Furthermore, this tool is written in Golang and React, running as a native binary for Linux distros as well.
It is licensed under MIT, and uses MySQL or Postgres. And if that doesn't tell you anything, there are several reasons why Mottermost outperforms Slack, such as the ability to manage multiple teams, messaging threads, search hashtags, Markdown format, multilanguage support, private cloud implementation, themes, friendlier channel names, syntax highlighting, etc.
As for the the key features that you should know about Mattermost stand out:
- Es compatible with Slack, so it will make your life easier if you are already using that platform and want to make the leap to Mattermost.
- It has application for different platforms for mobile devices, as well as a native web and desktop version for Linux (Mattermost Desktop). Therefore, you can have it on Windows, Android, iOS, macOS and also on Linux.
- Easy deployment, management and update. It can be run as a binary on Linux, as well as a Docker image, etc. In fact, it is surely available in the repos of your favorite distro, or in application stores or software centers, so you can install it very easily.
- Una great community active to improve and help if you need it.
- Integration with a multitude of tools or applications, like Jira, IRC, XMPP, Hubot, Giphy, Jenkins, GitLab, Trac, Redmine, SVN, RSS / Atom, and many more,
- possibility of create and share your own apps using the APIs and drivers that Mattermost offers, etc.
More information - Mattermost official website