Jack Dorsey, best known as the co-founder of Twitter and now CEO of Block, has quietly built something radically different over a single weekend: Bitchat — a messaging app that doesn’t need the internet, doesn’t require a phone number or email address, and doesn’t collect user data.
Announced Sunday via a post on X (formerly Twitter), Bitchat is now available in beta on Apple’s TestFlight platform. A detailed white paper outlining how it works is also up on GitHub for those interested in the technical foundation. But the core idea is simple: let people message each other securely and privately, even when there’s no network.
Dorsey described the app as a personal project exploring the possibilities of decentralized communication — touching on everything from Bluetooth mesh networking and encryption models to “store-and-forward” message delivery, where messages hop between devices and are delivered once a user is back online.
How It Works Without the Internet
Bitchat relies entirely on Bluetooth — a feature built into nearly every smartphone — to create a network between nearby devices. As users move around, their phones automatically connect to others in close proximity, forming local clusters. Messages can then travel from one device to another, hopping across phones until they reach the recipient.
This technique, known as a Bluetooth mesh network, means users can chat without relying on cellular towers, Wi-Fi hotspots, or centralized servers. Some devices act as “bridges,” connecting separate clusters and expanding the reach of the network. Even if you’re not directly near the person you want to message, the app can relay your message across multiple devices to get it there.
Importantly, messages disappear by default and are only stored temporarily on individual phones. They never touch the cloud or get routed through any company’s infrastructure — aligning with Dorsey’s long-standing interest in privacy, encryption, and user autonomy.
Designed for Privacy and Resilience
In stark contrast to apps like WhatsApp, Messenger, or Signal — which require a phone number, email, or cloud-based account — Bitchat operates entirely peer-to-peer. It doesn’t ask for personal identifiers, doesn’t log your activity, and doesn’t track your location or contacts.
This design is particularly useful in scenarios where internet access is limited or deliberately cut off, whether due to government censorship, natural disasters, or remote geography. Bitchat echoes the kind of tools used during Hong Kong’s 2019 pro-democracy protests, when demonstrators used similar offline messaging systems to coordinate in the face of widespread surveillance.
For people in authoritarian regimes or areas with restricted speech, this could mean access to a rare form of communication that remains functional and free from interference, even when traditional systems go dark.
Group Chats, Message Relay, and What’s Coming Next
Despite being built over a weekend, Bitchat already supports several key features. Users can create group chats — or “rooms” — that are tagged with hashtags and can be password-protected for added privacy. If someone in the group goes offline, the app’s “store-and-forward” feature allows messages to wait in the mesh and get delivered once that user reconnects.
Dorsey also hinted that upcoming updates would bring support for WiFi Direct — a peer-to-peer connection method that can boost speed and distance, further increasing Bitchat’s range and reliability.
In effect, Bitchat aims to offer a full-fledged messaging experience that runs entirely without the traditional web — no accounts, no servers, no corporations in the middle.
Part of a Bigger Movement
Bitchat isn’t a random detour for Dorsey. It fits neatly into his broader philosophy of decentralizing the internet and putting more power back into users’ hands. Over the past few years, he has funded or supported projects like Bluesky, which aims to build decentralized social media, and Damus, a federated platform built on the Nostr protocol.
These projects share a common goal: resist corporate and government control over digital communication, and allow people to interact online without intermediaries mining their data or controlling what they can say.
Bitchat extends this mission into the messaging space, offering a tool that works without any of the traditional trappings — no cloud, no logins, no tracking — while still offering secure, end-to-end encrypted conversations.
Why This Matters Now
With internet censorship on the rise globally, and increasing concerns over how tech giants collect and use personal data, there’s a growing appetite for alternatives that don’t rely on big tech infrastructure. Bitchat arrives as a fresh attempt to reimagine what messaging could look like in a world where people value privacy, control, and freedom over convenience and corporate polish.
The app could be particularly useful in regions experiencing conflict, authoritarian crackdowns, or frequent network disruptions. It also holds appeal for privacy-conscious users, activists, journalists, or anyone who wants to communicate without leaving a trail.
