I don't really like Signal. I don't like Telegram either. Wire is acceptable, but also clunky. It kinda sucks that people have to basically choose and commit to one app with all of their contacts now, if IM apps were federated like e-mail and Mastodon you could just keep talking to your friends from wherever.
Wasn't Mastodon going to integrate Matrix? I remember seeing a merged pull request about that, and there also now are some fields about this in Mastodon's ActivityPub objects.
