Jack Dorsey, co-founder of Twitter and CEO of Block, has launched a messaging service called Bitchat, which allows smartphones to exchange encrypted messages via Bluetooth without internet connectivity. Currently in beta on Apple’s TestFlight, Bitchat creates a mesh network linking nearby devices, enabling communication even when cellular and Wi-Fi signals are weak. The app does not route traffic through company servers, collect personal information, or require accounts, and messages are stored only on users' devices and designed to disappear by default. Bitchat features group chats called “rooms,” identified by hashtags and secured with passwords, and includes a “store and forward” capability for offline users. The application aligns with Dorsey's commitment to decentralization and is intended to facilitate communication during blackouts, censorship, or surveillance. A technical paper about Bitchat is available on GitHub, and future updates will enhance connectivity through Wi-Fi Direct links.