Briar - Secure messaging, anywhere
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Bridgefy - Integrating Bridgefy allows mobile devices to communicate in a secure and efficient way across...
tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page
The Serval Mesh - It works by using your phone's Wi-Fi to not communicate with other phones on the same network.
JivoChat - JivoChat is a live chat that enables you to talk to visitors on your website