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secure-messaging

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Spixi

Spixi is a decentralized, post-quantum secure communications super-app with messaging, calls, file sharing, a crypto wallet, and Mini Apps. Users hold their own keys, self-authenticate cryptographically, and enjoy true end-to-end encryption with no central servers.

  • Updated Apr 28, 2026
  • C++

This is a client-server app in C++ that encrypts messages using ChaCha20-Poly1305 and uses X25519 for secure key exchange. It supports bidirectional TCP communication and configuration via XML.

  • Updated Sep 10, 2025
  • C++

True peer-to-peer encrypted chat where messages vanish like ghosts. No servers, no storage, no accounts. Messages travel directly via WebRTC and exist only in memory. Self-destructing messages, panic button, file sharing, and zero tracking. Open source privacy-first messaging.

  • Updated Mar 21, 2026
  • TypeScript

Secure messaging without smartphones. Native SimpleX Protocol implementation in C for embedded systems. Features Hardware Abstraction Layer supporting multiple MCU platforms, hardware security modules, and three device tiers from maker-friendly to state-level protection.

  • Updated Feb 26, 2026

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