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Open Source · Decentralized · No Accounts

Zemzeme

Four transport layers - Bluetooth offline, WiFi Direct, peer-to-peer, and online relay - fall back automatically so your messages always get through. No phone number. No email. No account.

⬇
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4 Transport Layers
0 Central Servers
35+ Languages Supported
100% Open Source
Transport Layers

Four Ways to Reach You

Zemzeme automatically picks the best transport layer for your situation. No configuration required - it just works.

Layer 01
📡

Bluetooth

Works with zero internet

Bluetooth Low Energy creates a self-healing mesh network between nearby devices. Each peer relays messages up to 30 meters per hop. Works even when cell towers are down, jammed, or unavailable.

Range: up to 30 m per hop
Multi-hop mesh relaying
No internet required
Self-healing topology
Layer 02 Coming Soon
📶

WiFi Direct

High-speed offline messaging

Creates a direct WiFi connection between devices with no router and no internet. Higher bandwidth and longer range than Bluetooth - ideal for larger areas or groups.

Range: up to 200 m
Higher bandwidth than Bluetooth
No router required
Works fully offline
Layer 03
🌐

Direct Connection

Direct connections, no relay

Powered by peer-to-peer technology, Zemzeme connects directly encrypted connections between peers. No relay server ever sees your traffic.

Peer-to-peer technology
NAT traversal built-in
No relay middleman
End-to-end encrypted always
Layer 04
⚡

Online Relay

Global reach, open protocol

When Bluetooth and direct connection aren't available, Zemzeme routes through the decentralized online relay network. Open protocol, no central authority - anyone can run a relay or choose their own.

Open relay protocol
Curve25519 key pairs
Any relay, no lock-in
Global reach
Explore All Features →
How It Works

Automatic Fallback, Every Time

Zemzeme tries each transport layer in order and switches automatically. You never have to think about it.

📡

Step 1 - Try Bluetooth

Look for nearby Zemzeme peers over Bluetooth. Create or join a mesh network within range.

Offline OK
↓
📶

Step 2 - Try WiFi DirectComing Soon

Establish a direct WiFi connection for higher bandwidth and longer range. No router needed, works completely offline.

Offline OK
↓
🌐

Step 3 - Try Direct Connection

Use peer-to-peer technology to find and connect directly to the recipient over the internet.

No Relay
↓
⚡

Step 4 - Route via Online Relay

Fall back to the decentralized online relay network for global reach. Messages are still end-to-end encrypted.

Global
App Preview

Built for Real Use

Clean, fast, and designed to work in the field. Compose UI, Material 3 dark theme, optimised for one-handed use.

Zemzeme
📡 Bluetooth: 3 peers
🌐 Internet: Online
A
Alice
Sure, I'll be there at 6pm
2m
B
Bob
📡 Bluetooth active
1h
#
⚡ local
12 peers in channel
5m
✏

Conversations

←
A
Alice
● Direct Connection
🔒
Hey, are you there?
14:22 ✓✓
Yes! Encrypted 🔐
14:22 ✓✓
No servers in the middle 🎉
14:23 ✓✓
Type a message...
→

Chat - Encrypted

⚡ Relay Channels
12 online
# city-general
8 peers · Bluetooth + Nostr
# emergency
4 peers · Bluetooth only
# global
247 peers · online relay
YOUR IDENTITY
npub1a3d...f9k2
No account · No email · QR verified ✓

Relay Channels

Security

Engineered for Privacy

State-of-the-art cryptography combined with a zero-knowledge architecture. Zemzeme cannot read your messages - because there is no Zemzeme server.

🔐

Noise Protocol

The same crypto handshake used by WhatsApp. Curve25519 for key exchange, ChaCha20-Poly1305 for message encryption. Perfect forward secrecy built-in.

🚫

No Account, Ever

Zero sign-up. No phone number, email address, or any personal identifier required. Your keypair is generated locally and never leaves your device.

🗑️

Emergency Wipe

Triple-tap the panic button to instantly delete all local data - messages, keys, contacts, and app state. Nothing recoverable.

🧅

Tor Network Support

Route all internet traffic through Tor for additional anonymity. IP addresses are never exposed to relay operators or peers.

📱

QR Peer Verification

Scan a QR code in person to verify a contact's public key fingerprint. Eliminates any risk of MITM even in adversarial network conditions.

💾

AES-256-GCM Local Storage

All local data - messages, contacts, keys - is stored using Android's EncryptedSharedPreferences with AES-256-GCM. Nothing stored in plaintext.

Comparison

How We Stack Up

Most messengers require a phone number, a central server, or both. Zemzeme requires neither.

Feature Zemzeme Bitchat Bridgify Signal Telegram Wire
No account required ✓ ✓ ~ ✗ ✗ ✗
No central servers ✓ ✓ ~ ✗ ✗ ✗
Works fully offline (Bluetooth) ✓ ✓ ✓ ✗ ✗ ✗
Direct device connections ✓ ~ ✓ ✗ ✗ ✗
End-to-end encryption ✓ ✓ ~ ✓ ~ ✓
No phone number needed ✓ ✓ ~ ✗ ✗ ✓
Open source ✓ ✓ ✗ ✓ ~ ✓
Emergency data wipe ✓ ✓ ✗ ✗ ✗ ✗
Tor routing support ✓ ✓ ✗ ✗ ✗ ✗
Peer-to-peer connections ✓ ~ ✓ ✗ ✗ ✗
Decentralized protocol ✓ ✓ ~ ✗ ✗ ✗
Press

In the News

Coverage from the privacy, security, and open-source communities.

Coming Soon
Press coverage placeholder - this section will be updated as coverage appears.
Zemzeme launched February 2026
Community
Built on Bitchat - the open-source Bluetooth messenger protocol
Fork of Bitchat Android v1.7.0
Open Source
100% open source - MIT license, no proprietary code, auditable by anyone
GitHub · MIT License
Platforms

Available Now & Coming Soon

Android
Available Now

Full feature set - Bluetooth, P2P, Nostr, encryption, emergency wipe, and Tor support. Android 8.0 (API 26) and above.

Download →
Desktop
Coming Soon

Desktop client for macOS, Windows, and Linux - full internet connections transport, keyboard-optimised interface.

iOS
Coming Soon

iOS and iPadOS support with full encryption parity. Bluetooth support pending Apple's CoreBluetooth API constraints.

Ready to Message Without Limits?

Download Zemzeme for Android. Free, open source, no account required.

⬇ Download APK (GitHub) All Download Options →