Signal Offline Messenger is described as 'Signal is a Wi-Fi Direct based offline messaging app. Signal allows you to communicate without internet or local network in range of upto 100 meters. User can share audio, text, photo and video messages to nearby users over Wi-Fi Direct'. There are five alternatives to Signal Offline Messenger for Online / Web-based, Android, iPhone, Facebook and Facebook Messenger. The best alternative is Facechat, which is free. Other great apps like Signal Offline Messenger are NickEgo (Free), WorldChat (Free), Bridgefy (Free) and Talkie (Free).