Bitchat is an open source peer-to-peer mesh communication network started in the summer of 2025 by Jack Dorsey. It's available on iOS, Android, and MacOS. Others have explored beyond this, with a terminal client and a self-powered ESP32-based mesh relay node. In theory, Bitchat enables cross-platform peer-to-peer messaging even when there's no cellular or Wi-Fi network available. In practice, it's not proven to be reliable in an offline environment. However, I believe it could be, and it's clear that the team agrees and is actively working toward that end.
Bitchat – A decentralized messaging app that works over Bluetooth mesh networks | Hacker News
Now add a twist: • Senders pay a small fee to send a message. • Relaying devices earn a micro-payment (could be tokens, sats, etc.) for carrying the message one hop further. • End-to-end encrypted, fully decentralized, optionally anonymous.
bitchat
bitchat is a decentralized peer-to-peer messaging application that operates over bluetooth mesh networks. no internet required, no servers, no phone numbers.
Wi-Fi Aware | Apple Developer Documentation
Securely pair and connect to external devices over peer-to-peer Wi-Fi.
Building peer-to-peer apps | Apple Developer Documentation
Communicate with nearby devices over a secure, high-throughput, low-latency connection by using Wi-Fi Aware.
Bitchat.land - Decentralized Geohash-Based Chat & Heatmap Platform
Desktop chat client with real-time geohash-based messaging, interactive heatmaps, and decentralized communication.
I am very excited about AT Protocol
AT Protocol (atproto) is the right mix of useful, practical, personal, and fun. I think it could save the internet.
Wijiti / blackhole / messenger · GitLab
A peer-to-peer, decentralized, general-purpose messaging application. Runs in the web browser. All messages are encrypted on the peer and the application can be run entirely client-side.
BitChat cache poisoning and replay in Bluetooth mesh
BARGHEST found a cache poisoning attack in BitChat and replay flaw in BLE mesh synchronization that enabled durable network disruption before patching.
SplinterCon - communications with and within isolated networks
A conference dedicated to technology for reaching isolated networks and solutions for users stuck inside national intranets.
Dejan Marjanović on Twitter / X
When you say TCP/IP, would WiFi ever work? Just imagining using one GB10 for 4x M5 Max laptops (small team of devs in an office) as prefill compute.— Dejan Marjanović (@djnmrjnvc) August 19, 2026
A peer to peer community platform built on the AT Protocol
7/ Check out the details, including a deeper discussion of challenges, a prototype of Bitchat over Wi-Fi Aware, and general notes on cross-platform Wi-Fi Aware implementation 👉 grjte.sh/bitchat-wifi-aware
