This is the History of Chat

Cool little graph, hat-tip to your designer for using each platform's respective branding where applicable.

It would be interesting to see how they waterfall into one another with the services that are built/extended from IRC or XMPP.

Related great read by David Auerbach [0] where he talks about the heated back and forth battle of reverse engineering and obfuscation between them and AOL.

[0] https://nplusonemag.com/issue-19/essays/chat-wars/