Why Chatopus choose XMPP/Jabber as its protocol?
Welcome to the open world of instant messaging. Using XMPP/Jabber, Chatopus allows you to connect to any public Jabber servers, which are free to use. This is unlike some instant messaging (IM) clients, which force customers to use some proprietary servers and even charge users annual fees for accessing the servers. For more information on Jabber, please refer to the section: Native Jabber/XMPP Support.