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Bitchat is a decentralized, peer-to-peer messaging app launched by Jack Dorsey in July 2025. It is designed to work without the internet, cellular service, or accounts. How it Works β€’ Offline Mesh: Uses Bluetooth to send messages directly from phone to phone. Messages "hop" across nearby devices to extend range. β€’ Nostr Integration: Uses the Nostr protocol as a fallback for global messaging when internet is available. β€’ No Identity: No phone numbers or emails required; users are anonymous by default. β€’ Resilience: Built for communication during internet blackouts, protests, or natural disasters. β€’ Payments: Supports offline Bitcoin/Lightning payments via Cashu e-cash tokens.