Signal inherits some of WhatsApp's limitations though. It requires that the primary device be an Android or IOS based smartphone with an internet connection; and your identifier is your telephone number, which has the same privacy implications as WhatsApp. With the centralised server model choosing Signal over WhatsApp is basically betting that Open Whisper Systems won't monetize your data, or won't be bought out by some bigger fish.

Why can't I use a messaging service from my desktop without having a smartphone with pre-approved operating system nearby?