Matrix is a nice federated protocol and with its client element (formerly riot) https://matrix.org/docs/projects/client/element https://matrix.org/docs/projects

Matrix is a nice federated protocol and with its client element (formerly riot) https://matrix.org/docs/projects/client/element https://matrix.org/docs/projects/client/element both demonstrate some respect for user privacy boundaries. But since it is mostly a network effects game and the setup of keys may be somewhat of putting I am not very optimistic. Its' a shame though...