I vote for matrix.org It is open and federated. Compared to XMPP it is overweight a bit, but at least it has sane mobile and browser clients and keeps all history in sync out of the box.
Propietary license and held by Facebook. As open as possible lol %)
I vote for matrix.org It is open and federated. Compared to XMPP it is overweight a bit, but at least it has sane mobile and browser clients and keeps all history in sync out of the box.
Propietary license and held by Facebook. As open as possible lol %)