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

Signal is now developed by Signal Messenger LLC, a software company founded by Moxie Marlinspike and Brian Acton in 2018, which is wholly owned by a tax-exempt nonprofit corporation called the …

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 chats and calls completely private.

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 Messenger User Guide Learn how to download Signal, explore its basic features, and make the most of its privacy tools and helpful tips.

Feb 4, 2026 · Signal’s approach to end-to-end encryption makes it especially safe for sending messages. We have some tips on how to use it, and why no messaging app is perfect.

3 days ago · The free Signal app, which provides private, end-to-end encrypted messaging and calls, helps keep your communications secure.

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.

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 can either.

To use the Signal desktop app, Signal must first be installed on your phone.