Jabber, a.k.a. XMPP. It's decentralized, featureful, standardized, and low on server resources.
Here's a user's guide I wrote.
https://contrapunctus.codeberg.page/the-quick-and-easy-guide-to-xmpp.html
Jabber, a.k.a. XMPP. It's decentralized, featureful, standardized, and low on server resources.
Here's a user's guide I wrote.
https://contrapunctus.codeberg.page/the-quick-and-easy-guide-to-xmpp.html