Besides Briar, BitTorrent used to have a client like that for a brief time: https://www.bittorrent.com/blog/2015/05/12/bleep-private-messenger-now-on-all-major-

Besides Briar, BitTorrent used to have a client like that for a brief time: https://www.bittorrent.com/blog/2015/05/12/bleep-private-messenger-now-on-all-major-platforms/ https://www.bittorrent.com/blog/2015/05/12/bleep-private-mes...