Mattermost is a self-hosted alternative to Slack.

The SIPB Mattermost runs on an XVM with decent specs.


almonds:

I recommend using the Matrix or Zephyr, for a few reasons:

  • the XVM instance runs an old distro;
  • it keeps running out of space;
  • it is a nontrivial pain to update the Mattermost, and it updates relatively frequently;
  • Mattermost is undergoing enshittification (features being limited, behind "Enterprise" or "Teams" editions);
  • it uses a MariaDB database, which Mattermost has been loosening support for;
  • many other nontrivial details which I cannot remember at the moment.
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