What are good alternatives for communicating with somebody then?
Sure, use Signal, and Tor, and others -- if you want your communication to be preferentially screened by every single three-letter agency.
BTW this is not to disparage any four-letter agencies, eg. GCHQ. They do awesome work, which I do appreciate very much.
The software that is processing your communications will spend extra 0.01 seconds analyzing the data. Is that some kind of victory for you or something?