Seems like a good time to plug Session: https://getsession.org/ https://getsession.org/ Open source, doesn't require a phone number, and a big strength is that

Seems like a good time to plug Session: https://getsession.org/ https://getsession.org/ Open source, doesn't require a phone number, and a big strength is that it's decentralized, which makes it much less vulnerable to outages like this. "Session utilises the decentralised Oxen Service Node Network to store and route messages. This means that unlike P2P messaging applications you can message Session users when they are offline. This network consists of community operated nodes which are stationed all over the world. Service nodes are organised into collections of small co-operative groups called swarms. Swarms offer additional redundancy and message delivery guarantees even if some service nodes become unreachable. By using this network, Session doesn’t have a central point of failure, and Session’s creators have no capacity to collect or store personal information about people using the app"