RetroShare is open source software for encrypted filesharing, serverless email, instant messaging, online chat, and BBS, based on a friend-to-friend network built on GNU Privacy Guard (GPG). Developed by DrBob
License: Open Source
RetroShare and Ricochet both offer secure communication, but RetroShare focuses on decentralization with a robust feature set including file sharing and chat, while Ricochet prioritizes anonymity through peer-to-peer connections and Tor. RetroShare is more versatile for general use, whereas Ricochet is tailored for privacy-conscious users.