I use wire (wire. com) for daily chatting. I like it but I couldn't find any good communities in wire. In session, or simpleX, there are privacy (and other) groups in which anyone can participate… Can we start a privacy group in wire so we folks can also hang around?
Signal minimizes metadata, they don't store it and encrypts everything, phone number isn't a issue as long you don't need anonimity, not everyone have to like federation and there are a lot of third party Signal clients which works perfect and they are allowed, like Molly.