Let’s follow the money and see who owns Signal. Signal does not collect or store any metadata about your messages, whereas WhatsApp collects some metadata, such as the phone numbers of the sender and recipient(s) and the time and date of the messages.This allows for a higher level of transparency and security, as opposed to WhatsApp's proprietary encryption protocol. Signal is an open-source project, which means that its code is publicly available for anyone to review and audit.Signal uses a more advanced encryption protocol called the Signal Protocol, which has been independently audited and is considered to be more secure than the encryption protocol used by WhatsApp.While WhatsApp does use end-to-end encryption for all its chats, there are a few reasons why Signal may be considered more private than WhatsApp. The argument is that Signal Messenger is more private, but how would it be more private? And how does Signal rival WhatsApp? Signal messenger is marketed as a medium where you can speak freely

So now and again people ask me to message through Signal rather than through WhatsApp.

Signal private messenger owner