RetroShare

RetroShare is a fully decentralized, open-source communication platform that establishes encrypted connections between you and your friends to create a network of computers. It provides various distributed services including forums, channels, chat, and mail, all while ensuring maximum security and anonymity.

Key Features

• True Decentralization:

  • No central servers or dependencies
  • Friend-to-friend (F2F) network topology
  • Works offline between connected friends
  • Censorship-resistant by design
  • No single point of failure
  • Complete data ownership

• Comprehensive Communication:

  • Encrypted instant messaging
  • Decentralized forums and channels
  • Secure mail system with offline delivery
  • Voice and video calls (experimental)
  • Multi-user chat rooms
  • File sharing with BitTorrent-like swarming

• Strong Security & Privacy:

  • PGP authentication between nodes
  • TLS encryption with Perfect Forward Secrecy
  • Optional Tor/I2P integration
  • Anonymous tunnels for friend-of-friend connections
  • IP address hidden from non-direct friends
  • No tracking or data collection

• Cross-Platform Support:

  • Available on Windows, Linux, macOS
  • Android version available
  • Extensible through plugins
  • JSON API for developers
  • Active development since 2006
  • Completely free and open-source