bitchat is a decentralized peer-to-peer messaging app that operates over Bluetooth mesh networks, enabling local group chats without the need for internet, servers, or phone numbers. It is designed with privacy and security in mind, offering encrypted private messages and channels alongside a public local chat that requires no registration.
Features
- Decentralized Mesh Network: Automatic peer discovery and multi-hop message relay via Bluetooth LE.
- End-to-End Encryption: Uses X25519 key exchange and AES-256-GCM for private communications.
- Channel-Based Chats: Topic channels with optional password protection and ownership transfer.
- Store & Forward: Messages cached for offline peers and delivered when they reconnect.
- Privacy First: No accounts, phone numbers, or persistent IDs; ephemeral messages by default.
- IRC-Style Commands: Familiar commands like /join, /msg, /who for easy chat management.
- Cross-Platform: Native apps for iOS and macOS.
- Cover Traffic: Dummy messages and timing obfuscation to prevent traffic analysis.
- Emergency Wipe: Triple-tap to instantly erase all data.
- Performance Optimizations: LZ4 compression, adaptive battery modes, and optimized network handling.
Project Samples
License
Public DomainFollow bitchat
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User Reviews
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Awesome p2p bluetooth messaging app that also lets you broadcast to the bitcoin network