Bitchat enables ephemeral, encrypted communication between nearby devices. As users move through physical space, their phones form local Bluetooth clusters and pass messages from device to device, allowing them to reach peers beyond standard range -- even without Wi-Fi or cell service. Certain "bridge" devices connect overlapping clusters, expanding the mesh across greater distances. Messages are stored only on device, disappear by default and never touch centralized infrastructure -- echoing Dorsey's long-running push for privacy-preserving, censorship-resistant communication.
Like the Bluetooth-based apps used during Hong Kong's 2019 protests, Bitchat is designed to keep working even when the internet is blocked, offering a censorship-resistant way to stay connected during outages, shutdowns or surveillance. The app also supports optional group chats, or "rooms," which can be named with hashtags and protected by passwords. It includes store and forward functionality to deliver messages to users who are temporarily offline. A future update will add WiFi Direct to increase speed and range, pushing Dorsey's vision for off-grid, user-owned communication even further.
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