Zemzeme

Zemzeme - Private messaging that doesn't need the internet to work. No account. No phone number. No central server. Just open the app, pick a nickname, and start talking. Every message is end-to-end encrypted - always. Most messengers stop working when you lose signal. Zemzeme doesn't. It uses Bluetooth mesh networking to send messages through nearby devices - no Wi-Fi, no mobile data, no internet required. When you do have connectivity, two additional transport layers activate automatically for global reach. Three transport layers, working simultaneously: ★ Bluetooth Mesh - Messages hop between nearby devices using Bluetooth LE. Works in airplane mode, underground, in rural areas, or anywhere there's no signal. Perfect for festivals, emergencies, travel, and off-grid communication. ★ Peer-to-Peer (libp2p) - Direct encrypted connections over the internet. No middleman server. Powered by libp2p, the same protocol used by IPFS and Ethereum. ★ Nostr Relay - Decentralized relay-based messaging for maximum reachability when direct connections aren't possible. The app automatically routes messages through whichever paths are available and falls back seamlessly. Built for privacy: • End-to-end encryption on every message (Noise Protocol - Curve25519 + ChaCha20-Poly1305) • No registration, no phone number, no email • No analytics, no tracking, no ads - ever • No data leaves your device unencrypted • Optional Tor routing for network-level anonymity • Verify contacts by scanning their QR code (Ed25519 signed) • PIN + biometric app lock What you can do: • Send text messages with @mentions • Record and send voice notes • Share images and files of any type • Join location-based public channels (city or country scale) • Create password-protected group chats • Verify peer identities with QR codes • See read receipts and delivery indicators • Relay messages for others on the Bluetooth mesh automatically Use cases: • Music festivals and crowded events with no signal • Natural disasters when cell towers go down • Travel in areas with limited or no connectivity • Privacy-conscious everyday messaging • Communities wanting communication free from centralized control • Off-grid and outdoor adventures How it works: 1. Open the app — no sign-up required 2. Grant Bluetooth and location permissions 3. Choose a nickname 4. Start messaging - nearby Zemzeme users appear automatically on the mesh 5. Tap + to join a location channel or start a private chat Zemzeme is open source and built on proven cryptographic libraries. Your privacy is not a feature - it is the foundation.