Z-Text is the world's first zk-SNARKs blockchain messenger built on the BitcoinZ blockchain. It provides end-to-end encrypted, decentralized messaging with no phone number required — your keys, your freedom.

Does Z-Text require a phone number?

No. Z-Text does not require a phone number, email, or any personal information to sign up. Your identity is a cryptographic z-address, keeping you fully anonymous.

How does Z-Text protect my privacy?

Z-Text uses zk-SNARKs (Zero-Knowledge Succinct Non-Interactive Arguments of Knowledge) to shield message metadata and content on-chain. Messages are end-to-end encrypted and routed through shielded transactions so no third party can see who is talking to whom.

Is Z-Text free to use?

Z-Text is free to download. The free version includes full wallet functionality for sending and receiving BTCZ. However, the messenger, raw memo messages, and saving new passwords in the blockchain password manager all require an active software license. After a subscription expires, you can still receive messages and read saved passwords, but you cannot reply or save new entries.

How is Z-Text different from Signal or Telegram?

Unlike Signal or Telegram, Z-Text stores messages on a decentralized blockchain — not on centralized servers. It requires no phone number, uses zk-SNARKs for metadata protection, and includes a built-in crypto wallet. There is no central company that can be compelled to hand over your data.

Is Z-Text quantum resistant?

Z-Text uses a quantum-resistant design rather than promising absolute post-quantum certainty. Message payloads use AES-256-GCM, which is commonly modeled as Grover-safe at roughly 128-bit effective security, and shielded z-addresses avoid persistent public-key exposure for messaging identity. The design reduces known quantum attack surfaces but should not be read as a guarantee against all future cryptanalysis.

How does Z-Text messaging work?

When you send a message, Z-Text encrypts it and broadcasts a shielded transaction on the BitcoinZ blockchain. The recipient's app detects the transaction via G-stream mempool push in 1-5 seconds. Messages are permanently settled on-chain after block confirmation.

What cryptocurrency does Z-Text use?

Z-Text is built on BitcoinZ (BTCZ), a community-driven cryptocurrency with zk-SNARKs privacy, no premine, and decentralized governance. BTCZ is used for message fees, handshake transactions, and premium license payments.

Can I recover my Z-Text messages if I lose my phone?

Yes. Because messages are stored on the blockchain, you can recover your entire message history by restoring your wallet with your 24-word seed phrase on a new device. The app rescans the blockchain to retrieve all messages and contacts.

A z-address is a shielded cryptocurrency address that begins with "zs1". It uses zk-SNARKs to hide transaction amounts, senders, and recipients. In Z-Text, your z-address serves as your private messaging identity.

Do I need to pay to use Z-Text?

Z-Text is free to download and the wallet works without a license. To use the messenger, send raw memo messages, or save new passwords in the blockchain password manager, you need an active software license. After expiry, you can still receive messages and read saved passwords, but cannot send or save.

Can I use Z-Text without BTCZ?

You need BTCZ to perform any blockchain transactions. Without an active software license, the messenger is not available — though you can still receive messages and use basic wallet functions.

Is Z-Text truly anonymous?

Yes. Z-Text requires no phone number, email, or personal information to sign up. It uses zk-SNARKs shielded transactions and collects no user data. Your identity is a cryptographic z-address with no link to your real identity, making your messaging fully anonymous.

What happens if I lose my device?

If you backed up your 24-word seed phrase, you can restore your wallet on a new device. Your messages and contacts will be recovered through blockchain scanning.

Can deleted messages be recovered?

Messages are stored on the blockchain permanently. Even if you delete them locally from the app, they can be recovered by rescanning the blockchain with your wallet keys.

What privacy failure points does Z-Text remove compared with Signal, Telegram, and WhatsApp?

Z-Text is designed to remove common messenger privacy failure points including IP exposure to recipients, phone-number identity, centralized routing, centralized message storage, metadata collection, weak censorship resistance, spam at scale, and dependence on a company server. The comparison section evaluates 15 privacy failure points and shows Z-Text as decentralized, phone-number-free, metadata-shielded, seed-recoverable, and quantum-resistant.

Why does Z-Text not need a phone number?

Z-Text uses your wallet seed and shielded z-address as your messaging identity. There is no SIM card, phone number, email address, or carrier-linked account to track, swap, subpoena, or block.

Why are no central servers important for private messaging?

Central servers create a place where messages, metadata, contact lists, queues, or account records can be stored, breached, censored, or demanded by third parties. Z-Text routes through decentralized BitcoinZ infrastructure, so there is no company server that can read, delete, or hand over your conversations.

How does Z-Text protect message metadata?

Z-Text combines local end-to-end encryption with BitcoinZ shielded transactions. zk-SNARKs hide sender and receiver details on-chain, while the message payload is encrypted before it leaves your device.

Does Z-Text expose my IP address to the person I message?

No. Messages are delivered through BitcoinZ nodes and shielded blockchain transactions, so your IP address is not exposed to the other party. Z-Text is designed to provide IP protection without requiring a VPN or Tor for the recipient relationship.

How does Z-Text resist censorship and subpoenas?

Z-Text stores encrypted messages on the decentralized BitcoinZ blockchain instead of a company database. There is no central inbox, moderation queue, or provider-controlled server that can be shut down, silently altered, or compelled to provide plaintext messages.

How does Z-Text prevent spam without moderators?

Z-Text uses a mutual cryptographic handshake before messages can flow, keeps your z-address private unless you share it, and attaches a tiny on-chain cost to each message. That makes mass spam economically impractical without relying on moderators, ads, or algorithms.

What is the trade-off in Z-Text messaging?

Z-Text is intentionally text-only: no files, pictures, or videos. The trade-off is a narrower messenger focused on encrypted text, metadata privacy, on-chain permanence, and censorship resistance.

Feature	Z-Text	Signal	Telegram
Phone number required	No	Yes	Yes
Stores data centrally	No — on-chain	Yes	Yes
Metadata shielded	Yes — zk-SNARKs	Partial	No
Built-in crypto wallet	Yes	No	Partial — TON
Readable message data to hand over	No — encrypted on-chain	Limited	Yes
Censorship-resistant	Yes	Limited	Limited

Early Access·Live now

Z-Text|Powered by zk-SNARKs & BitcoinZ Blockchain

Speak FreelyForever

An end-user messenger that delivers messages through BitcoinZ shielded transactions — AES-256-GCM encrypted on-device, metadata hidden by zk-SNARKs, and designed for censorship-resistant communication.

No phone number

No central message servers

No censorship

Chats

1.00349

Search conversations...

All

Work

Friends

Family

Barbara9:41

I love this app so much right now 😭❤️

Rok9:32

Best payment app I never knew I had 😂

Cryptoqueen9:22

Safe travels! Nobody will know 🕵️

Marcelus8:55

Blockchain vault > cloud vault, no debate

CryptoRex8:41

Free speech AND free money. Can't stop either 🌍

Haruto8:15

Wait you just sent me money mid-conversation?! 🤯

Chats

Contacts

Wallet

AES-256 + zk-

Authenticated encryption plus shielded metadata

No IP Logging

The app itself keeps no IP logs

1–5 sec

Average delivery time

On-chain

Encrypted, recoverable from your seed

Verify, don't trust

Don't take our word for it

Z-Text's core claims are public and checkable. Here's how to confirm them yourself in under a minute.

Read the threat model

See exactly what Z-Text defends against — and what it can't. Published in full, no hand-waving.

Read security docs

Verify the bounty on-chain

A 7 ZEC bug-bounty pool, funded at a public address. Check the balance on any explorer.

t1bV6TkNwWBGBPtGhJCNEQZChpGVivHhHGEView on explorer

See how it works

Install, create a wallet, send a message — no phone, no email, no server. Follow the walkthrough.

Getting started

Why Ztext?

Built from the ground up for one purpose: unstoppable, private communication.

No central message servers

Messages route through decentralized BitcoinZ nodes — no company can read, store, or delete them. No central point of failure.

No phone number

Your identity comes from your wallet seed. No SIM, no phone number, no tracking — true anonymity.

No IP logging

zk-SNARKs hide sender and recipient on-chain. The app keeps no IP logs, and recipients never see your IP. Add Tor for network-level anonymity.

Fully decentralized

There is no Z-Text server in the message path. If Z-Text Ltd vanished tomorrow, messaging keeps running on the public network.

Blockchain stored

Encrypted messages settle on the BitcoinZ blockchain. As long as the network exists, your history restores from your 24-word seed on any device.

AES-256-GCM encryption

Two layers per message: AES-256-GCM authenticated encryption on your device, plus Sapling-family shielded transactions on BitcoinZ.

Quantum-resistant

No persistent public-key exposure for shielded identities, plus AES-256 payload encryption — Grover-safe at roughly 128-bit effective security, shrinking known quantum attack surfaces.

Spam resistant

Your Z-address is shared only when you choose — never listed, scraped, or sold. Messaging needs a mutual cryptographic handshake, and each message costs ~$0.00003 on-chain: invisible to you, too expensive for bots to scale.

Panic mode

An emergency PIN wipes keys, messages, and contacts in one action. Stealth mode re-skins the app so it doesn't look like a messenger — for when privacy is life or death.

On-chain vault

No signup, no email, no cloud. Credentials are AES-256-GCM encrypted on-device and derived from your seed — restore on any device with your 24-word mnemonic. Your seed, your data.

About the Protocol

Z-Text, BitcoinZ, and zk-SNARKs

Z-Text is the messenger client and application-layer protocol. BitcoinZ is the base blockchain network used for shielded transaction delivery and settlement. zk-SNARKs are the zero-knowledge proof system used by shielded transactions to hide transaction metadata. Z-Text is not a separate layer-2 chain: it writes encrypted message payloads through the BitcoinZ shielded transaction layer.

Technical Specifications

Product type

Privacy messenger application

Z-Text client and messaging protocol

Base network

Layer-1 blockchain settlement

BitcoinZ blockchain

Privacy layer

Sender, receiver, and amount shielding

Sapling-family shielded transactions using zk-SNARK proofs

Payload encryption

Local end-to-end message encryption

AES-256-GCM authenticated encryption before broadcast

Key exchange

Recipient-only decryption

X25519 contact key exchange

Identity model

No phone number or email identity

Shielded z-address generated from the wallet seed

Message delivery

Near-real-time encrypted delivery

G-stream mempool push, typically 1–5 seconds before block settlement

Message network fee

Economic spam resistance

Approximately $0.00003 per on-chain message at current BTCZ fee assumptions

Storage model

No central message database

Encrypted payloads settle on the BitcoinZ blockchain

Recovery model

Self-custodial recovery

24-word seed phrase rescans wallet, messages, contacts, and vault data

Trust Model

Trust nobody — pick your tier

Three privacy tiers, your choice. Each tier moves the trust boundary closer to you. Signal, WhatsApp, and Telegram architecturally cannot offer the self-hosted tier — there is no protocol-level option for the user to remove the company from the loop.

Default

Official lightd

Connects to the official lightd server.

What lightd sees

A shielded transaction was submitted.

What lightd cannot see

Sender, recipient, amount, message content. zk-SNARKs hides all of it.

The message recipient never sees the sender's IP.

Tor

Official lightd over Tor

Same client, routed through Tor.

What changes

The lightd operator no longer sees the user's IP.

What still holds

Same shielding as Default — sender, recipient, amount, content remain hidden by zk-SNARKs.

Add Tor when the operator's view of your IP also matters to you.

Self-hosted

Your own lightd or full BitcoinZ node

User runs the server software.

What any third party sees

Nothing. There is no third party in the loop.

Including Z-Text Ltd

We have no visibility into your activity. There is no relationship to compromise.

Architecturally, Signal, WhatsApp, and Telegram cannot offer this tier.

Pick the tier that matches your threat model. You can switch tiers without losing your messages — the on-chain data is the same; only the path to it changes.

Why Not Signal/Telegram/WhatsApp?

Great apps, but they rely on centralized infrastructure. We identified 15 privacy failure points and measured 10 points of centralization — here's how each network compares.

15 Privacy Failure Points

Privacy Failure Point	Ztext	Signal	Telegram	WhatsApp	Session
Recipient never sees your IP (architectural)
End-to-end encrypted by default
No phone number required
Truly decentralized
No metadata collection
On-chain (recoverable from seed)
Recover ALL data from seed
Integrated crypto wallet
Economic spam prevention
Censorship resistant
zk-SNARKs privacy
Perfect Forward Secrecy
No separate token required
Open source
Quantum-resistant design
Privacy criteria addressed	15 of 15	5.5 of 15	0.5 of 15	3.5 of 15	7 of 15

Recipient never sees your IP (architectural)

Ztext

Signal

Session

End-to-end encrypted by default

Ztext

Signal

Session

No phone number required

Ztext

Signal

Session

Truly decentralized

Ztext

Signal

Session

No metadata collection

Ztext

Signal

Session

On-chain (recoverable from seed)

Ztext

Signal

Session

Recover ALL data from seed

Ztext

Signal

Session

Integrated crypto wallet

Ztext

Signal

Session

Economic spam prevention

Ztext

Signal

Session

Censorship resistant

Ztext

Signal

Session

zk-SNARKs privacy

Ztext

Signal

Session

Perfect Forward Secrecy

Ztext

Signal

Session

No separate token required

Ztext

Signal

Session

Open source

Ztext

Signal

Session

Quantum-resistant design

Ztext

Signal

Session

Privacy criteria addressed

Ztext15 of 15

Signal5.5 of 15

Telegram0.5 of 15

WhatsApp3.5 of 15

Session7 of 15

Supported

Partial

Not supported

10 Points of Centralization

Component	Ztext	Signal	Telegram	WhatsApp	Session
Message routing	DecentralizedBlockchain	CentralizedCentral servers	CentralizedCentral servers	CentralizedMeta servers	DecentralizedService nodes
User identity	DecentralizedSeed phrase	CentralizedPhone number	CentralizedPhone number	CentralizedPhone number	DecentralizedSession ID
Key management	DecentralizedLocal only	PartialSVR enclaves	CentralizedServer-held	PartialBackup keys	DecentralizedLocal only
Message storage	DecentralizedOn-chain	CentralizedServer queues	CentralizedCloud stored	CentralizedServer queues	PartialSwarm nodes
Network discovery	DecentralizedP2P nodes	CentralizedCentral directory	CentralizedCentral directory	CentralizedCentral directory	DecentralizedDHT lookup
Push notifications	DecentralizedNot needed	CentralizedGoogle/Apple	CentralizedGoogle/Apple	CentralizedGoogle/Apple	CentralizedGoogle/Apple
Software updates	DecentralizedManual/F-Droid	PartialApp stores	PartialApp stores	CentralizedApp stores only	PartialApp stores
DNS / domain	DecentralizedNo domain needed	Centralizedsignal.org	Centralizedtelegram.org	Centralizedwhatsapp.com	DecentralizedNo domain needed
Payment / funding	DecentralizedCrypto native	PartialDonations	PartialAds + premium	CentralizedMeta funded	DecentralizedToken funded
Metadata protection	Decentralizedzk-SNARKs	CentralizedSealed sender partial	CentralizedNone	CentralizedCollected by Meta	DecentralizedOnion routing
Centralized components	0 of 10	8.5 of 10	9 of 10	9.5 of 10	2 of 10

Message routing

ZtextDecentralizedBlockchain

SignalCentralizedCentral servers

TelegramCentralizedCentral servers

WhatsAppCentralizedMeta servers

SessionDecentralizedService nodes

User identity

ZtextDecentralizedSeed phrase

SignalCentralizedPhone number

TelegramCentralizedPhone number

WhatsAppCentralizedPhone number

SessionDecentralizedSession ID

Key management

ZtextDecentralizedLocal only

SignalPartialSVR enclaves

TelegramCentralizedServer-held

WhatsAppPartialBackup keys

SessionDecentralizedLocal only

Message storage

ZtextDecentralizedOn-chain

SignalCentralizedServer queues

TelegramCentralizedCloud stored

WhatsAppCentralizedServer queues

SessionPartialSwarm nodes

Network discovery

ZtextDecentralizedP2P nodes

SignalCentralizedCentral directory

TelegramCentralizedCentral directory

WhatsAppCentralizedCentral directory

SessionDecentralizedDHT lookup

Push notifications

ZtextDecentralizedNot needed

SignalCentralizedGoogle/Apple

TelegramCentralizedGoogle/Apple

WhatsAppCentralizedGoogle/Apple

SessionCentralizedGoogle/Apple

Software updates

ZtextDecentralizedManual/F-Droid

SignalPartialApp stores

TelegramPartialApp stores

WhatsAppCentralizedApp stores only

SessionPartialApp stores

DNS / domain

ZtextDecentralizedNo domain needed

SignalCentralizedsignal.org

TelegramCentralizedtelegram.org

WhatsAppCentralizedwhatsapp.com

SessionDecentralizedNo domain needed

Payment / funding

ZtextDecentralizedCrypto native

SignalPartialDonations

TelegramPartialAds + premium

WhatsAppCentralizedMeta funded

SessionDecentralizedToken funded

Metadata protection

ZtextDecentralizedzk-SNARKs

SignalCentralizedSealed sender partial

TelegramCentralizedNone

WhatsAppCentralizedCollected by Meta

SessionDecentralizedOnion routing

Centralized components

Ztext0 of 10

Signal8.5 of 10

Telegram9 of 10

WhatsApp9.5 of 10

Session2 of 10

The trade-off — Z-Text is text-only — no files, pictures, or videos. Pure encrypted text. Only real secrets.

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