XMPP Alternatives

XMPP is described as 'Or Extensible Messaging and Presence Protocol, is an open standard for instant messaging and real-time communication, allowing for message exchanges between any two entities on the Internet. It's known for its decentralized and extensible nature' and is a instant messenger in the social & communications category. There are more than 25 alternatives to XMPP for a variety of platforms, including Android, Mac, Windows, iPhone and Web-based apps. The best XMPP alternative is Matrix, which is both free and Open Source. Other great apps like XMPP are WhatsApp, Jami, Conversations and Adium.