This question is so generic with added weird statements, there are literally dozens of solutions with little research. Due to this I assume you haven’t formulated all your requirements and want us to get them out of you.
Well then, literally almost ANY chat daemon you can install in any Linux will just do. And there are loads!
If you want to pay a provider to do that or rent a cheap Vs and do it yourself is another thing.
So if some guidance is all you need that’s fine and something I’ll gladly provide. Rocketchat - as someone else already posted - is relatively recent but also quite modern due to this, running in browser, app or mobile (but quite the overkill für a handful of people).
Any really old IRC based daemon would not require any resources by today’s standards and still run perfectly for your case. But it’s very old standards might not fit your expectations.
This question is so generic with added weird statements, there are literally dozens of solutions with little research. Due to this I assume you haven’t formulated all your requirements and want us to get them out of you.
There ain’t really much requirements to make a big post listing them. I just want a place to chat with my friends.
Well then, literally almost ANY chat daemon you can install in any Linux will just do. And there are loads!
If you want to pay a provider to do that or rent a cheap Vs and do it yourself is another thing.
So if some guidance is all you need that’s fine and something I’ll gladly provide. Rocketchat - as someone else already posted - is relatively recent but also quite modern due to this, running in browser, app or mobile (but quite the overkill für a handful of people).
Any really old IRC based daemon would not require any resources by today’s standards and still run perfectly for your case. But it’s very old standards might not fit your expectations.