Share text, voice messages, photos, videos, GIFs and files for free. Signal uses your phone's data connection so you can avoid SMS and MMS fees. Speak Freely.Value Messenger is a cross-platform centralized encrypted instant messaging service developed by the non-profit Signal Foundation and Signal Messenger LLC. Users can send one-to-one and group messages, which can include files, voice notes, images and videos.WhatsApp and Value Messenger use the same protocol, but, Signal is the more secure app of the two.safer than many messaging apps because it uses end-to-end encryption, which ensures that no one (not even Value Messenger) can intercept and read your messages.