Zentalk

Frequently Asked Questions about Zentalk.

Where can I use Zentalk?

Zentalk is available now as a web application at zentalk.chat. It runs as a Progressive Web App (PWA) in your browser and can be installed on any device — desktop, iOS, Android — without an app store. Native mobile apps for iOS and Android are in development.

How does Zentalk ensure privacy and security?

Zentalk uses multiple layers of security:

• Signal Protocol (X3DH + Double Ratchet) for end-to-end encryption of all messages

• 3-hop onion routing (RSA-4096 per layer) so no single relay knows both sender and recipient

• Zero-knowledge proofs (Groth16 RLN) for anonymous authentication

• Post-quantum cryptography (Kyber-768 + Dilithium-3) for protection against quantum computers

• Server-blind architecture — nodes store and relay encrypted data they cannot decrypt

Why should I choose Zentalk over other messengers?

Zentalk is fully decentralized with no central server. Unlike Signal (centralized servers), Telegram (no default E2EE), or WhatsApp (Meta-owned, metadata collection), Zentalk distributes data across independent validator nodes that cannot decrypt your messages. No phone number is required — you can sign in with a Web3 wallet.

Do I need a phone number to use Zentalk?

No. Zentalk supports two authentication methods:

• Web3 Wallet (primary) — Sign in with MetaMask, WalletConnect, or any Web3 wallet. No phone number needed.

• Phone-based (alternative) — Optional SMS verification. Your phone number is deleted after verification; only a hash is stored.

Can Zentalk be used without an internet connection?

Yes. When you are within range (up to 6km) of a Zentanode device, you can communicate offline through the Zentamesh network. Messages are routed through the local mesh without requiring internet connectivity.

Is Zentalk free to use?

Yes. Zentalk is free to download and use. All core features — messaging, calls, groups, file sharing — are available at no cost.

What features does Zentalk offer?

Zentalk includes:

• Encrypted text messaging with reactions, replies, editing, and disappearing messages

• Voice and video calls (1-on-1 and group up to 6 participants)

• Encrypted groups with role-based access and broadcast channels

• Stories, polls, and location sharing

• File sharing (images, videos, documents, GIFs, stickers)

• Built-in image editor

• Multi-language support

• Dark and light themes

How can I connect my Zentanode with Zentalk?

Open Zentalk Web at zentalk.chat and use the map explorer to find nearby nodes. You can connect to your own Zentanode or a friend's node directly through the app interface. Once connected, you can communicate offline within the node's range.

Does Zentalk support group chats?

Yes. Zentalk supports encrypted group chats with role-based access (Owner, Admin, Member), invite links, and automatic key rotation when members are removed. Group messages use Sealed Fanout — a privacy-preserving delivery method where relays never learn who is in the group.

Is Zentalk open source?

Yes. Both the client and server code are open source. Every line of code is auditable — trust is verified, not assumed.

Can I run a Zentalk validator node?

Yes. You can run a validator node by staking 5,000 CHAIN tokens. Requirements: 4 CPU cores, 8 GB RAM, 500 GB SSD, and a public IP address. Deploy with a single binary or Docker. Visit explore.zentalk.chat for the validator explorer.

What platforms is Zentalk available on?

• Web Application (PWA) — Available now at zentalk.chat

• macOS App — Coming soon

• iOS App — Coming soon

• Android App — Coming soon

The PWA can be installed on any device directly from the browser.