Millions of people use Signal every day for free and instantaneous communication anywhere in the world. Send and receive high-fidelity messages, participate in HD voice/video calls, and explore a growing set of new features that help you stay connected. Signals advanced privacy-preserving technology is always enabled, so you can focus on sharing the moments that matter with the people who matter to you. Say anything State-of-the-art end-to-end encryption (powered by the open source Signal Protocol) keeps your conversations secure. Privacy isnt an optional mode its just the way that Signal works. Every message, every call, every time. Go fast Messages are delivered quickly and reliably, even on slow networks. Signal is optimized to operate in the most constrained environment possible. Feel free Signal is a completely independent c nonprofit. Development is supported by users like you. No advertisements. No trackers. No kidding. Be yourself You can use your existing phone number and address book to securely communicate with your friends. Speak up Whether they live across town or across the ocean, Signals enhanced audio and video quality will make your friends and family feel closer. Whisper in the shadows Switch to the dark theme if you refuse to see the light. Sound familiar Choose custom alerts for each contact, or disable noises completely. Simon & Garfunkel wrote a hit song about it in , and you can experience the sound of silence whenever you want by choosing None as your notification ringtone. Picture this Use the built-in image editing features to sketch, crop, and flip your outgoing photos. Theres even a text tool so that you can add more words to the , that your picture is already worth. Follow us on Twitter (@signalapp) and Instagram (@signal_app) for all of the latest updates and announcements.