I'd like to install for my son and his school friends a small web chat to use with mobile phone.
It should be open source and easy to secure.
I have hard time finding a chat easy to install and with little memory footprint.
Maybe nextcloud talk? Nextcloud is easy to install on vps or a rpi and admin. I haven’t really used talk but it seems to be privacy focused enough and comes with mobile and web clients.
Yes, as far as I know IRC is the best option. But I need to put a web interface on it. Also IRC documentation use a "jargon" and there is no "modern" documentation.
It is easy to interface with IRC.