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Zentalk is a decentralized messaging protocol that uses end-to-end encryption and a peer-to-peer mesh network. There are no central servers - messages are routed through distributed relay nodes, and all encryption happens on your device.

You have three options. Connect an Ethereum wallet (MetaMask, WalletConnect and others) and sign a message to prove ownership. Or choose "New account" and Zentalk generates a 12-word recovery phrase on your device — no wallet app and no phone number needed. Or register with a phone number and a password. An email address is never required, and whichever way you choose, your encryption keys are generated locally on your device.

No. If you do not have one, choose "New account" and Zentalk creates an identity for you on your device, secured by a 12-word recovery phrase. Signing in with a wallet simply means proving you own a key pair instead of handing over personal details, and it enables future features like token-gated groups.

Yes, Zentalk is completely free and open source. The project is funded through community donations and the CHAIN token economy that rewards relay node operators.

Zentalk uses the Signal Protocol (X3DH key exchange + Double Ratchet) for end-to-end encryption. Additionally, we implement Kyber-768 hybrid cryptography for post-quantum security - protecting your messages against future quantum computer attacks.

Post-quantum cryptography (PQC) uses algorithms resistant to quantum computer attacks. Zentalk combines classical X25519 with Kyber-768 (NIST standard) - an attacker would need to break BOTH to decrypt messages.

Only you and your recipient. Messages are encrypted on your device before leaving. Relay nodes only see encrypted data they cannot decrypt. Even if all relays were compromised, your messages remain secure.

Messages travel through 3 different relay nodes (like Tor). Each node only knows the previous and next hop, not the full path. Your IP is hidden behind multiple encryption layers.

No message content, ever — we cannot read your messages or your contact list. What an account needs is kept: your wallet and mesh address, your username and display name, and, only if you registered with a phone number, a one-way hash of that number rather than the number itself. Deleting your account removes these.

Yes. You have full control over your data. Go to Settings and delete your mesh backups at any time. Since data is encrypted with your wallet key, only you can access or delete it. When you delete, the encrypted shards are removed from all mesh nodes.

Your encrypted backup is stored on the decentralized mesh network. Restore it on any device by signing in the same way you registered — wallet, 12-word recovery phrase, or phone number and password — and entering your backup password. Without your recovery phrase or backup, you'll need to start fresh.

Yes. Groups use Sender Keys encryption - each member has a key that others use to decrypt their messages. Key rotation happens automatically when members leave.

Yes. Calls use WebRTC with end-to-end encryption. Call metadata is minimal and call history syncs via the encrypted mesh backup.

Mesh Storage is our decentralized backup system. Your encrypted data is split into 15 shards using erasure coding and distributed across multiple nodes. Even if 5 nodes go offline, your data survives.

Your DMs, groups, and channels are backed up to the mesh network with no expiration. Data is encrypted with your wallet-derived key - only you can decrypt it. When you delete a group or channel, the backup updates automatically. You have full control: you can delete all your backups at any time via Settings.

Go to Settings > Invite Friends. Share your personalized link (zentalk.chat/u/yourname) or QR code. You can share directly to WhatsApp, Telegram, X/Twitter, SMS, or Email. When someone uses your link, they can start chatting with you immediately after connecting their wallet.

Only if you switch it on — "Find me by phone number" is off by default. Once enabled, a one-way PBKDF2 hash of your number is published to the mesh so people who already have your number can find you; your real number is never published. Zentalk never uploads your address book, and it works fine without a phone number at all.

Yes. Files up to 100MB are supported with the same end-to-end encryption as messages. Large files are chunked and distributed across the mesh network.

You can register a unique username that maps to your wallet address. Share your username link (zentalk.chat/u/yourname) so others can find you without knowing your wallet address.

Run the one-command setup: curl -sSL https://zentalk.io/setup-relay.sh | sudo bash. This installs Docker, guides you through wallet setup, waits for your stake deposit, and starts your node automatically.

You need to stake 100,000 CHAIN tokens to become a relay operator. The stake is locked in a smart contract and returned when you stop operating (minus any penalties for extended offline periods).

Approximately 0.01 CHAIN per message relayed. Average relays handle 1,000-10,000 messages per day, earning 10-100 CHAIN daily. Monthly ROI is typically 3-30% depending on network usage.

Under 1 hour: no penalty. 1-24 hours: warning, no new messages assigned. Over 24 hours: 1% stake penalty per day. Over 7 days: removed from network with 10% stake slashed.

Minimum: 2 CPU cores, 2GB RAM, 20GB SSD, 100 Mbps connection. Recommended: 4 cores, 4GB RAM, 50GB SSD, 1 Gbps connection. You need ports 8443, 9091, and 9101 open.

Check your internet connection. If the recipient is offline, messages are queued on the mesh network for up to 7 days. Try refreshing the connection in settings.

Ensure your wallet extension is unlocked. Try disconnecting and reconnecting. For WalletConnect, scan a fresh QR code. Clear browser cache if issues persist.

Double-check your backup password. Ensure you're using the same wallet address. If mesh nodes are unreachable, wait and retry - the network may be temporarily congested.

Open an issue on our GitHub repository (github.com/ZentaChain) with device info, app version, and steps to reproduce. For security vulnerabilities, email security@zentalk.chat.