I haven't seen Mattermost [0] mentioned by anyone here, especially considering it's open-source and you can self-host. Admittedly, it has been a while since I'v

I haven't seen Mattermost [0] mentioned by anyone here, especially considering it's open-source and you can self-host. Admittedly, it has been a while since I've done some research on these platforms, but is there something I'm missing that makes Zulip or Rocketchat better? [0] https://mattermost.com/ https://mattermost.com/