BitChat vs OMEMO Chat
BitChat
bitchat.free
OMEMO Chat
omemo.globalSide by side
| Figure | BitChat | OMEMO Chat |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| macOS | Yes | — |
| iOS | Yes | — |
| Android | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Encrypted Messaging Apps | 8.9 (#1) | 7.2 (#35) |
| Encryption | The project describes Noise Protocol end-to-end encryption for mesh messages and BitChat private envelopes for Nostr fallback messages. | The site describes a hybrid post-quantum key exchange using X25519 and ML-KEM-1024. |
| Messaging features | Features include IRC-style commands, automatic message routing, message queuing, and a triple-tap emergency wipe. | The Chat App Only page says the app supports encrypted text, media, voice, and video communications. |
| Privacy | The app requires no accounts or phone numbers, but its mesh uses a persistent per-device identifier derived from the identity key. | The privacy policy says message content never reaches servers the company controls and that it has no key to decrypt messages. |
Plans
In their own words
BitChat
BitChat is a decentralized messaging app that uses Bluetooth mesh for nearby communication and Nostr relays for internet messaging. Bluetooth messages can pass between nearby devices across as many as seven hops without internet access. When Bluetooth is unavailable, the app can use Nostr; if neither route is available, messages can wait in a queue. Geographic chat rooms use geohash coordinates.
The app requires no account, phone number, or central server. Live mesh sessions use Noise XX for mutual authentication and forward secrecy, while private Nostr messages use an app-specific encrypted format that works only with BitChat clients. However, mesh announcements expose static keys and nicknames in cleartext, and a persistent per-device identifier can allow nearby listeners to follow a device over time and place. A triple-tap emergency wipe clears app data, including identity keys and queued messages. Android adds Wi-Fi Aware on supported devices and built-in Tor. BitChat is available for iOS, Android, and macOS, and is free.
OMEMO Chat
OMEMO Chat has no write-up on Specifiction yet; its figures are above.