It will be open source, end to end encrypted using Signal’s double ratchet encryption protocol, and he plans to make it easy for fediverse platforms to integrate it. The beta will release later this month.
He’s also the creator of https://fedidb.org btw
I’m very excited for this too. The fact that the majority of the comments are not “ewww who whants ANOTHER chat client” really shows how much demand there is for something like that in this crowded space.