Signal

Secure open-source messaging tool offering encrypted chats, calls, and privacy-focused features across devices

Messaging app with speed and security enhancements

Instant messaging and calling app for multiple platforms

Feature-rich communication platform for virtual meetings, HD video conferences, team chat, and VoIP calling

Free, browser-based video conferencing platform emphasizing strong encryption, privacy, and essential collaboration features

PC application that provides unlimited video calls and the ability to send and receive text messages

Lightweight LAN messenger for encrypted chats, file transfers, and desktop capture with zero configuration