<h2>XMPP (Jabber)</h2> Open source, federated XML-based instant messaging protocol, historically used by Google Talk, WhatsApp (initially), and still active in some enterprise and IoT contexts.
<h2>XMPP (Jabber)</h2> Open source, federated XML-based instant messaging protocol, historically used by Google Talk, WhatsApp (initially), and still active in some enterprise and IoT contexts.