The State of XMPP and Instant Messaging [pdf](fosdem.org)
fosdem.org
The State of XMPP and Instant Messaging [pdf]
https://fosdem.org/2016/schedule/event/state_of_xmpp/attachments/slides/957/export/events/attachments/state_of_xmpp/slides/957/FOSDEM_2016__The_State_of_XMPP_and_Instant_Messaging.pdf
2 comments
I think that Telegram is more like 3rd one.. It has nice desktop apps and group chats with bots like jaconda.im
Dunno about other messengers, but Telegram offers channels! And this is awesome! + nice options to share with telegram via some links
Telegram is still 2nd gen, as Group Chat is secondary feature, no message correction, but has reply