libsignal

Android keyboard for secure E2EE communication through the signal protocol in any messenger. Communicate securely and independent, regardless of the legal situation or whether messengers use E2EE

The WhatsApp API

Encrypt right inside any messenger: the keyboard encrypts, the screen decrypts, no jumping between apps. iOS and Android, Signal Protocol, fully offline.

Automatic compilation of native libraries for the Signal messenger

Client lib for libsignal-protocol-c. Implements the necessary interfaces using gcrypt and SQLite.

Privacy-first messenger. 9-digit IDs, no phone, no email. End-to-end encrypted via libsignal. SwiftUI + iOS 16+.

Android client for RCQ — privacy-first messenger. 9-digit IDs, no phone, no email. End-to-end encrypted via libsignal, with censorship circumvention built in. Open beta.

Cross-platform BEAM (Erlang/Elixir/Gleam) implementations of the Signal Protocol

Erlang NIF binding for libsignal-protocol-c

Wrapper for libsignal, implementing the Signal Protocol for end-to-end encryption. Features Double Ratchet, X3DH, Sealed Sender, Group Messaging (SenderKey), and Kyber post-quantum key exchange. Optimized for Flutter and cross-platform applications (Android, iOS, Linux, macOS, Windows). AGPL-3.0 Licensed.

Modern TypeScript implementation of the Signal Protocol for Node.js

The session and cipher for groups, based on libsignal-protocol-javascript.

Contacts, phone and messages for Android. One Material 3 Expressive design, zero Google dependencies, and end-to-end encrypted messaging between Seca phones.

Go variant of https://github.com/signalapp/curve25519-java

Azokle Keyboard – A lightweight, privacy-first, offline Android keyboard with customizable themes, smart suggestions, and fast performance.

A safe instant messenger/social media app with end-to-end encryption

Python bindings for Signal's libsignal (PyO3 + maturin)

Terminal client for RCQ — the same end-to-end encryption as the phone and desktop clients (libsignal, sealed sender), driven from a shell or script. One Node bundle, no GUI, registers as a secondary device of your account. AGPL-3.0.

PHP FFI bindings for Signal's libsignal cryptographic library