I'm also curious about this. Gitter.im (which now is integrated with Matrix) is also an option, but not as user-friendly as Discord. With Discord at least you h

I'm also curious about this. Gitter.im (which now is integrated with Matrix) is also an option, but not as user-friendly as Discord. With Discord at least you have unlimited searchable chat history (which is invaluable for OSS communities, and one of the top reasons you should avoid Slack). However, I can see Discord removing this free luxury in the future...