WhatsApp uses end-to-end encryption to protect all communication on its platform. These encryption keys not only make it impossible to decrypt messages, but they also prevent third parties and even WhatsApp from accessing messages or calls.

What is the safest alternative to WhatsApp?

Threema. This app is open-source, E2E encrypted, and—just like Dust and Signal—deletes messages from its servers right after theyre delivered. Threema doesnt require a phone number or email to sign up, instead verifying users through Threema IDs, a QR code that allows them to be completely anonymous.