Signal messaging application

Signal is a privacy-focused encrypted communications service developed by the Signal Technology Foundation and Signal Messenger, LLC. Unlike commercial messaging platforms, Signal is built as a non-profit project, emphasizing end-to-end encryption and data minimization. The software's development is centered in the United States, utilizing open-source protocols that have become the industry standard for secure digital communication.

The history of Signal began with the integration of RedPhone and TextSecure. Since its inception, the brand has maintained a unique position in the tech world by operating without venture capital or advertising revenue, relying instead on grants and donations to support its infrastructure. Its architecture ensures that the service provider has no access to user messages or call content, a design philosophy that remains its core market differentiator.