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

• Offline Mesh: Uses Bluetooth to send messages directly from phone to phone. Messages "hop" across nearby devices to extend range.

• Nostr Integration: Uses the Nostr protocol as a fallback for global messaging when internet is available.

• No Identity: No phone numbers or emails required; users are anonymous by default.

• Resilience: Built for communication during internet blackouts, protests, or natural disasters.

• Payments: Supports offline Bitcoin/Lightning payments via Cashu e-cash tokens.