Bitchat

Aplicación Descentralizada

Decentralized peer-to-peer messaging application operating over Bluetooth Low Energy (BLE) mesh networks. No internet, servers, phone numbers, or accounts required. Each device acts as both client and relay, automatically discovering peers and forwarding messages across multiple hops (max 7). Features Noise Protocol encryption with forward secrecy, IRC-style group channels with hashtags, optional password protection, Panic Mode data wipe, and Nostr integration for internet-connected global messaging. Built as a weekend experiment by Jack Dorsey .

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Detalles

Licencia Open source (public domain); github.com/permissionlesstech/bitchat — Swift (iOS/macOS); whitepaper on GitHub; build via Xcode with xcodegen or Swift Package Manager
Estado de Desarrollo 🔬 Beta
Detalle del Estado de Desarrollo Beta / Active (v1.3.0+; iOS/macOS App Store release; Android available; 360,000+ worldwide downloads by late Sept 2025; significant adoption in Madagascar protests (70,000 downloads in one week), Nepal protests (50,000 downloads in one day), Uganda and Iran during internet blackouts Jan 2026; active development; security audit not yet completed)
Propietario Jack Dorsey (co-founder of Twitter/X, CEO of Block Inc.); developed under 'and Other Stuff' open-source collective funded by Dorsey; published via permissionlesstech GitHub organization
Órgano de Gobierno None (open-source development led through the 'and Other Stuff' collective funded by Jack Dorsey; no governance mechanism)
País USA
Año de Inicio 2025
Stack Swift (iOS/macOS app); Bluetooth Low Energy (BLE) mesh networking; Noise Protocol Framework (encryption); Nostr protocol (internet-connected messaging since v1.3.0); binary protocol optimized for BLE constraints; Xcode/xcodegen build system
Financiamiento 'and Other Stuff' open-source collective (funded by Jack Dorsey personally)
Última Investigación 9 mar 2026

Dominios de Caso de Uso

Comunicación

Capacidades

Cifrado de extremo a extremo Funciona sin conexión / en malla

Aplicación Descentralizada Atributos

Orígenes Weekend experiment by Jack Dorsey (July 2025; motivation to learn about Bluetooth mesh networks, relay/store-and-forward models, and message encryption; IRC nostalgia; decentralization ethos from Twitter/Bluesky background)
Base de Datos None (no persistent database; messages stored temporarily on-device only; disappear by default; Panic Mode wipes all local data with triple-tap; no server-side storage)
Lenguaje de Consulta N/A (no query interface; real-time message relay via BLE mesh and Nostr)
Formatos de Datos Custom binary protocol (compact packet format optimized for Bluetooth LE constraints); Noise Protocol encrypted payloads; Nostr events (NIP-compliant for internet messaging); geohash-based location channels
Edición Colaborativa en Vivo No (text messaging only; no document collaboration)
Edición de Texto Enriquecido No (plain text messages; IRC-style chat)
Soporte Móvil Yes (iOS 16.0+ App Store; Android; designed mobile-first — BLE mesh requires physical device proximity)
Soporte Web No (no web interface; operates via native mobile/desktop apps only; BLE requires hardware access)
Aplicaciones Nativas Yes (iOS/iPadOS via App Store; macOS via App Store; Apple Vision Pro; Android; no Windows/Linux native apps)
Términos Free / open source (public domain license; no subscriptions, in-app purchases, or ad trackers; no account required)
Fondos Not disclosed (personally funded by Dorsey; no external investment; free to users)
Basado En Bluetooth Low Energy (BLE mesh networking); Noise Protocol Framework (end-to-end encryption with forward secrecy); Nostr protocol (internet relay for global reach); IRC (conceptual inspiration for channel-based chat)
Categoría de Caso de Uso Offline/emergency communication (disaster response, protests, internet blackouts, festivals, areas without connectivity; censorship-resistant messaging)
Tipo de Interfaz de Usuario Mobile chat app (IRC-style interface with hashtag channels; minimalist design; Panic Mode button)
Capacidades sin Conexión Fully offline (core design — BLE mesh requires zero internet infrastructure; Nostr provides optional internet extension; store-and-forward for temporarily offline peers)
Funciones de Colaboración Group channels (IRC-style hashtag channels with optional password protection; #mesh default local channel; geohash-based location channels via Nostr; direct messages with E2EE)
Portabilidad de Datos None (messages are ephemeral; device-only storage; no export or backup mechanism; Panic Mode intentionally destroys all data)
Ecosistema de Integraciones Nostr (internet-connected messaging layer since v1.3.0; geohash location channels; Nostr relay integration for global reach beyond BLE range)
Exportación de Datos de Web2 No (no data persistence or export by design)
Coherencia Prosocial Moderate (designed for communication freedom and censorship resistance; empowers protest and disaster communication; no identity verification — pseudonymous; community-oriented but no built-in prosocial incentive structures)
Flujos Económicos No (no economic or transaction features; free communication tool)
Gobernanza y Toma de Decisiones None (no governance mechanisms; open-source development led by Dorsey/'and Other Stuff'; community contributions via GitHub)
Medios / Publicación No (text messaging only; no publishing features)
Gestión del Conocimiento No (ephemeral messages; no knowledge persistence)
Sensemaking No
Gestión de Proyectos No
Modelo de Comunicación BLE mesh relay (multi-hop up to 7 hops within ~300m per hop; flooding mesh where every device relays; Nostr for internet-connected global messaging; IRC-style group channels and direct messages)
Resiliencia de Red High (functions during internet blackouts, natural disasters, protest shutdowns; no infrastructure dependency; proven in Madagascar, Nepal, Uganda, Iran; vulnerable to Bluetooth jamming)
Mecanismo de Descubrimiento Automatic BLE peer discovery (devices automatically find nearby Bitchat users; no manual configuration; Nostr for internet-connected discovery; geohash channels for location-based grouping)
Participantes Máximos Limited by BLE range (~300m per hop, max 7 hops; no theoretical user limit but BLE congestion at high density; Nostr extends to global scale for internet-connected users)
Soberanía de Datos Full device-level (no servers store data; no accounts or phone numbers; messages exist only on local devices; Panic Mode erases everything; no metadata collection)