Zulip [1] is free/open source and arguably has better usability. Bubble [2] runs our day-to-day chat on Zulip and it's worked really well. [1] https://zulip.or

Zulip [1] is free/open source and arguably has better usability. Bubble [2] runs our day-to-day chat on Zulip and it's worked really well. [1] https://zulip.org/ https://zulip.org/ [2] https://git.bubblev.org/bubblev/bubble https://git.bubblev.org/bubblev/bubble