Updated on
Nov 18, 2021

A free, secure communications application that provides end-to-end encrypted individual and group messages, audio, and group video calls. Available as an app on iPhones and Androids, and can be used as a desktop client as well. Signal is the best option for secure messaging and file sharing, especially in high-risk contexts.


Please contact us for information on appropriate use cases and comparisons to other messaging applications. For more information about why Signal is the best secure messaging app in most contexts, you can also reference the Cybersecurity Handbooks for Civil Society Organizations and Political Parties.