Any names you can name using federated xmpp? In my little corner of the trading world everybody seems to use either ICE Chat and/or Bloomberg. My guess would be ICE Chat is xmpp under the hood, but I don't think it's federated.
And there are federated networks like the one from Markit
https://www.businesswire.com/news/home/20131007005587/en/Glo...
I don’t think there is a single major financial messenger today that isn’t based on XMPP.