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
This is meant to work with the ActivityPub fediverse ie. Mastodon, Lemmy, Kbin, Pixelfed etc. and you would be able to use your current lemmy.world account for messaging.
But why is that such a great benefit? We already have a myriad accounts for different services/platforms; would this be merely a marginal improvement over the current situation?