Those implementations both require phone numbers and registration through a mobile app (hence lack anonymity) and are useless for many use cases. I think Matri

Those implementations both require phone numbers and registration through a mobile app (hence lack anonymity) and are useless for many use cases. I think Matrix (Riot) would be a better choice. It's e2e encrypted like Signal but doesn't have any nonsense reliance on phones or phone numbers. It also has extra features like true multiple device support, a federated protocol and an open server implementation.