Bitchat is a decentralized messaging app that uses Bluetooth mesh networks for peer-to-peer communication, eliminating the need for internet or central servers. The open-source project supports iOS, macOS, and Android, allowing devices to relay messages across multiple hops in physical proximity. This creates ad-hoc networks resistant to censorship and surveillance.

The approach addresses growing concerns about centralized infrastructure vulnerabilities. Traditional apps depend on servers that can be monitored or disabled, while Bitchat’s design ensures functionality during internet outages, natural disasters, or in regions with poor connectivity. Each device acts as both client and server, enabling direct communication without phone numbers or accounts.

Bitchat’s release into the public domain and its full protocol compatibility across platforms make it a practical tool for activists, travelers, or communities with limited infrastructure. The project’s GitHub repositories provide source code and documentation, inviting developer contributions. Future adoption will depend on user density for effective mesh networking in real-world scenarios.