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Signal

Signal

Open sourceFree

End-to-end encrypted messaging standard

Overview

The gold standard for encrypted messaging. Uses the Signal Protocol (also used by WhatsApp and others). Open-source, non-profit, minimal metadata collection. Requires a phone number to register.

Visit siteSource code

Referenced in

Practices using Signal

Encrypted Messaging

Gold standard for E2EE messaging. Non-profit. Minimal metadata.

Messaging Metadata

Sealed sender hides who messages whom from Signal itself.

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