Jack Dorsey, the co-founder of Twitter and current CEO of Block, has introduced BitChat — a groundbreaking decentralized messaging app that leverages Bluetooth technology to enable secure, internet-free communication. Announced on July 6, 2025, via a post on X, BitChat marks Dorsey’s latest venture into privacy-focused technology, building on his history of supporting encrypted communication tools like Signal.
A Decentralized Approach
Unlike traditional messaging apps that rely on centralized servers and internet connectivity, BitChat operates using Bluetooth Mesh technology. This innovative approach allows messages to hop between devices within a network, extending communication ranges beyond 300 meters through peer relays. The app requires no personal data for registration, offering users the freedom to choose any username and ensuring complete anonymity.
Currently, BitChat supports only text messages, which are stored locally on devices and protected by robust encryption methods, including Curve25519 for key exchange and AES-GCM for data security.
Key Features and Functionality
BitChat’s design emphasizes privacy and offline usability. Its standout features include:
- Offline Communication: Works seamlessly without internet access, ideal for areas with poor connectivity or during network outages.
- End-to-End Encryption: All messages are encrypted using Curve25519 and AES-GCM, ensuring they remain secure from interception.
- Favorites System: Users can designate “favorites,” allowing store-and-forward messaging that persists indefinitely for selected contacts.
- Mentions and Rooms: The app supports user mentions (e.g., @username) for direct notifications and enables the creation of topic-based “rooms” for group chats.
- Password-Protected Rooms: Rooms can be secured with passwords and AES encryption, adding an extra layer of privacy for sensitive discussions.
The app’s interface, as showcased in Dorsey’s X post, features a sleek, dark-themed design with green text reminiscent of early IRC (Internet Relay Chat) aesthetics, nodding to the app’s retro-inspired vibe.
Future Plans and Limitations
Looking ahead, Dorsey has hinted at expanding BitChat’s capabilities, with plans to integrate Wi-Fi support for transmitting larger files—a feature that could broaden its utility. However, the app is currently limited to iOS and macOS platforms, with no immediate plans for Android compatibility, though its platform-agnostic protocol suggests potential for future cross-platform development. The open-source nature of the project, with its code available on GitHub, invites community contributions that could accelerate such expansions.
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Availability and Community Response
BitChat is accessible via TestFlight for iOS and macOS users, with Dorsey encouraging testers to provide feedback as the app remains in beta. The open-source code on GitHub allows tech enthusiasts to explore and contribute to its development, fostering a collaborative approach.
A Vision for Privacy and Resilience
BitChat aligns with Dorsey’s long-standing advocacy for decentralized and censorship-resistant communication.
By eliminating the need for servers, accounts, or data collection, the app addresses growing concerns about surveillance and data breaches. Its ability to function offline makes it a potential lifeline in emergencies, such as natural disasters or regions with restricted internet access.
As of 07:18 PM CEST on July 7, 2025, BitChat is still in its early stages, but its innovative use of Bluetooth Mesh and commitment to privacy signal a bold step forward in the evolution of messaging technology. With Dorsey’s track record and the project’s open-source foundation, BitChat could soon become a significant player in the world of secure, decentralized communication.
