Signal comes up with Sealed Sender feature that hides the sender information outside of the package. Service aims to validate the senders identity to prevent spoofed messages and provide assurance for the receivers bout who sent the message. Signal is the most scalable encryption tool that encrypts any text, video, or image before it leaves your phone. Users can enable an optional setting that allows them to receive incoming sealed sender messages from non-contacts and people with whom they havent shared their profile or delivery token.”]
Source: https://gbhackers.com/signal-introduces-sealed-sender-feature/