Chat/Instant Messaging protocols comparison

Comparison Table Protocol Decentralized Encryption Main Use Case Examples XMPP Yes Optional Federated messaging ejabberd, Prosody Matrix Yes Yes Decentralized chat Element, Synapse Signal No Yes Secure messaging Signal, WhatsApp SIP No Optional Multimedia communication Asterisk, Linphone IRC No No Community channels Libera Chat, EFnet ActivityPub Yes Optional Social networking Mastodon, Pleroma…