

One thing to note, Signal has never purported to be “private”. It is “secure”. There’s a huge difference. Everyone has to find a balance between privacy and usability. Not having phone ID means no way to reduce the chance a user is bot as well as if you don’t register a personal name or phone number or anything else traceable, it makes it difficult for users to find eachother. And as for tracking the source and destination of messages, again if those are random destination routing IDs for a particular conversation, it makes it difficult to route to multiple devices. And if you don’t include source identifiers then there’s no way to block a spammer or other hostile user or provide delivery receipts to the sender. If you eliminate the storage of messages on the centralized server entirely and have it just be for routing, then if a device is offline at the moment a message is composed, it can’t be sent. These are just some examples of privacy vs usability. I won’t go into real-time video and audio as they are even more complex.
What signal is, is a system that does not store the keys for the messages themselves, thus as long as all user’s devices are secure, the messages are secure. This it does very well.
If you want a private messaging system, there are many options out there, but Signal needs to be usable for the masses of technically illiterate as well as secure. These are more for things like journalist who need privacy for whistleblowers. In that case the lack of usability is a reasonable tradeoff.
Of course I’m oversimplifying some things, but the basic idea is that Signal is not a private messaging app, it is a secure messaging app.


It’s more private than something like Facebook Messenger or most other popular chat apps, that’s not it’s primary purpose and again, it does not purport to 100% privacy as it does to 100% security of messages. Anonymity is one way to achieve privacy, but it isn’t the only way. Unfortunately, it’s the only way if you want to obey laws in most countries, basically privacy by making it impossible for the company to give any information to police, courts, etc.
The OP though is primarily complaining about privacy and not security and that’s what I’m trying to differentiate. It’s never ever said it gives a 100% private experience but does purport to making messages content as secure as possible.