Signal

Signal is an open-source web app and server that provides encrypted communication. It functions as a messenger using a device's data connection via WiFi, 4G, or 5G to send and receive messages and make calls. The software is designed to facilitate instantaneous communication across the globe without the use of advertisements, trackers, or data collection practices.

The software is available as a mobile application for Android and iOS, as well as a desktop client. It serves as a comprehensive communication tool for users who need to exchange high-fidelity messages and media while maintaining a high level of privacy. The deployment model relies on client-side applications that connect to the Signal infrastructure to route encrypted traffic between participants.

Key features

• End-to-end encrypted text messaging
• HD voice calls
• HD video calls
• Group chat functionality
• File sharing capabilities
• Cross-platform support for Android, iOS, and Desktop
• Integration with mobile data and WiFi connections

Signal utilizes privacy-preserving technology to secure communications between users. The project is licensed under the GNU AGPLv3 and maintains a public codebase on GitHub for bug tracking and contributions. The development process includes a beta release channel for users to test new features before they reach the standard release. It is intended for individuals and groups who prioritize data privacy and the secure transmission of high-fidelity media across different operating systems.

Because it avoids data collection and tracking, the software is suited for users who seek a private messaging platform. The architecture ensures that the service remains focused on the delivery of messages and calls rather than the monetization of user metadata.

Signal positions itself as a secure messaging utility focused on privacy and the elimination of user tracking.