Bitchat

Bitchat is a decentralized peer-to-peer messaging app, reportedly created by Jack Dorsey, that lets you keep talking even when the internet is down. Instead of relying on servers, it connects people directly through Bluetooth mesh networks, so your conversations never depend on a cell signal or Wi-Fi.

There is no sign-up friction here: no servers and no phone numbers are required. The app handles automatic peer discovery and multi-hop message relay on its own, passing messages device to device so they can travel farther than Bluetooth alone would allow.

Positioned as 'the side-groupchat' for seamless offline communication, Bitchat shines in exactly the situations where traditional internet-based messaging falls short—remote areas with no coverage, natural disasters, power outages, or any emergency moment when staying connected truly matters.