DON'T DO THIS - Signal is not as private and secure as you think
It leaks metadata
It requires a GPS tracker (a phone number)
You cannot run on your own servers
It has unavoidable google services (eg captcha)
The builds are not reproducable
It contains binary blobs (not completely open source)
You'd be better off taking the time to get them onto a properly secure and private messenger, such as:
Simplex Chat
Session
Briar
In any case, the solution here is simple. Just delete all those spyware apps (Signal, Telegram, Whatsapp, Viber) and communicate ONLY on secure apps like the ones above. Or email.
DON'T DO THIS - Signal is not as private and secure as you think
You'd be better off taking the time to get them onto a properly secure and private messenger, such as:
In any case, the solution here is simple. Just delete all those spyware apps (Signal, Telegram, Whatsapp, Viber) and communicate ONLY on secure apps like the ones above. Or email.