RetroShare

RetroShare is a cross-platform, decentralized friend-to-friend (F2F) communication suite designed for private and secure collaboration and sharing. It combines messaging, community features, and file distribution, with strong cryptography and optional anonymity layers.

Key Features

• Friend-to-friend network model with secure connections between trusted peers
• Encrypted chat (including chat rooms) and encrypted mail-style messaging with offline delivery
• Secure file sharing with search and swarming transfers similar to BitTorrent
• Decentralized forums, channels, and boards that can sync when peers come online
• Optional operation over Tor or I2P to hide IP addresses (including builds that manage Tor)
• Experimental VoIP and video calling via plugin

Use Cases

• Private group communication and sharing for communities that prefer decentralized infrastructure
• Secure file distribution to friends and wider network participants with reduced metadata exposure
• Offline-capable discussions via decentralized forums that sync automatically when connected

Limitations and Considerations

• The network is primarily trust-based (friend-to-friend); discovery and reach depend on peer connections
• Some features (notably VoIP/video) are experimental and may be less mature than core messaging and sharing

RetroShare fits users who want an encrypted, peer-to-peer alternative to centralized chat and sharing platforms. Its combination of F2F trust, offline messaging, and optional Tor/I2P support makes it suitable for privacy-focused collaboration.