I'm not aware of any messenger that is more secure. In fact, almost every other encrypted messenger uses the same algorithm.
It might not by the most anonymous messenger (as there is Session and Threema for example that don't require a phone number) but it's probably the most secure.
Well, that’s true but it barely affects anonymity.
All that can be determined from that is that the number in question has a signal account, and how recently the account has checked for messages. It doesn’t tie messages or contacts to the number. (Any more)
Actually, it does not. Signal cannot build social graphs based on communications. This is one of many unique inventions that Signal implemented and what makes Signal so great.
WhatsApp does use that same Signal protocol for its messages but that's very poor writing considering all the tracked metadata arguably makes it just as insecure as Telegram.
So the Hunter Biden case is a complete farce but I found it alarming that they were proving WhatsApp messages as evidence during the trial. Clearly the messages aren't encrypted against Meta, or they hold keys users don't know about or they wouldn't be able to furnish messages.
I might be missing the point, but isn’t this a decently dumbed-down description of the difference between services that are end-to-end encrypted and those that are not?