mattermost
mattermost
Posted Feb 23, 2026 8:22 UTC (Mon) by rnestler (subscriber, #160299)In reply to: mattermost by marcH
Parent article: Open-source Discord alternatives
I also used mattermost at a former employer. One nice thing is, that it is bundled with GitLab, so if you self-host GitLab it's very easy to just enable the mattermost server as well and integrating it with the user management of GitLab (https://docs.gitlab.com/integration/mattermost/).
We also use it in our Hacker- / Makerspace as the main communication tool and it works very well for us.