Signal is used by millions of people around the world every day to communicate instantly and for free, regardless of their location. With Signal, users can send and receive high-fidelity messages, participate in HD voice and video calls, and explore a growing set of new features designed to help them stay connected. The app’s advanced privacy-preserving technology is always enabled, ensuring secure conversations every time.
Signal’s end-to-end encryption, powered by the open-source Signal Protocol™, keeps conversations secure, making privacy a standard feature of the app. Signal is optimized to operate on slow networks, delivering messages quickly and reliably.
Signal is a completely independent 501c3 nonprofit, supported by users without the interference of advertisements or trackers. The app uses existing phone numbers and address books to ensure secure communication with friends.
Signal’s enhanced audio and video quality make friends and family feel closer, regardless of their location. Users can switch to the dark theme for a different look, and customize alerts for each contact.
The built-in image editing features allow users to sketch, crop, and flip outgoing photos, with a text tool to add extra words. For support, questions, or more information, users can visit https://support.signal.org.
The app’s source code is available on GitHub at https://github.com/signalapp. Users can follow Signal on Twitter (@signalapp) and Instagram (@signal_app) for the latest updates and announcements.