Signal is a free, open source, messaging app for simple private communication with friends.

Also available on Android and Desktop.

For troubleshooting and questions, please visit our support center or unofficial community forum.

We use GitHub for bug tracking. Please search existing issues and create a new one if the issue is not yet tracked. For Android users, please use the Signal for Android issue tracker.

Instructions on how to setup your development environment and build Signal-iOS can be found in BUILDING.md. Other useful instructions for development can be found in the Development Guide wiki page. We also recommend reading the contribution guidelines.

Have something you want to say about Signal Foundation projects or want to be part of the conversation? Get involved in the community forum.

This distribution includes cryptographic software. The country in which you currently reside may have restrictions on the import, possession, use, and/or re-export to another country, of encryption software. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software, to see if this is permitted. See http://www.wassenaar.org/ for more information.

The U.S. Government Department of Commerce, Bureau of Industry and Security (BIS), has classified this software as Export Commodity Control Number (ECCN) 5D002.C.1, which includes information security software using or performing cryptographic functions with asymmetric algorithms. The form and manner of this distribution makes it eligible for export under the License Exception ENC Technology Software Unrestricted (TSU) exception (see the BIS Export Administration Regulations, Section 740.13) for both object code and source code.

Licensed under AGPLv3

Copyright 2014-2023 Open Whisper Systems

Apple and the Apple logo are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc., registered in the U.S. and other countries.