SmartMesh - The app allows you to send text messages, images, files and voice messages without internet.
Briar - Secure messaging, anywhere
Leak - Just say it. Send an anonymous email.
Bridgefy - Integrating Bridgefy allows mobile devices to communicate in a secure and efficient way across...
The Serval Mesh - It works by using your phone's Wi-Fi to not communicate with other phones on the same network.
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.