[Sebb767]

While I agree that one shouldn't trust WhatsApp and I don't use it, I don't think it is fair to simply label it as backdoored without further proof. It uses Signals encryption after all, despite its drawbacks (i.e. single-client only or multi-client with a rather bad setup).

[Mediterraneo10]

By default WhatsApp backs up everything to Google Drive in plaintext. You might turn that feature off, but the vast majority of a person's contacts likely won't.