Talk:I want to know about options for private chat

Since the mentioned tools should be open source, I'm not sure Telegram should be recommended here. While its client is open source, the server isn't.

After "These clients work with your existing accounts on Google, Facebook, Yahoo, etc. and encrypt the conversation on the respective networks", I'd add that this service is also offered by default to all Riseup and Autistici/Inventati users -- https://help.riseup.net/it/chat and https://www.autistici.org/en/stuff/man_jabber/index.html -- and that there are autonomous servers like Systemli.org offering it without an email account -- https://www.systemli.org/en/service/xmpp.html