Download Signal for Android, iOS, Linux, macOS, and Windows.

Download Signal app for Android, iOS, iPhone, iPad, iPod Touch, or Desktop for free! Get the latest version of Signal Messenger.

Mar 26, 2025 · Signal is a free and open-source application for Android, iOS, and desktop that employs end-to-end encryption to keep communications safe.

State-of-the-art end-to-end encryption (powered by the open source Signal Protocol) keeps your conversations secure. We can't read your messages or listen to your calls, and no one else …

Signal is a messaging app with privacy at its core. It is free and easy to use, with strong end-to-end encryption that keeps your communication completely private.

Signal users can send private messages and make secure calls to other Signal users anywhere in the world for free over the internet. All Signal-to-Signal communication is private and end-to …

Understand the basics of Signal on Android, iOS, and Desktop.

In The Signal by William Powell Frith, a woman sends a signal by waving a white handkerchief. A signal is both the process and the result of transmission of data over some media …

She has over 17 years of experience in tech, spanning industry, academia, and government. Before joining Signal as President, she was the Minderoo Research Professor at NYU, and …

Whether you’re looking to build a business, protect the spaces that matter most, or start a meaningful career, our approach is built on trust, respect, and proactive solutions. With Signal, …