Your Privacy. Unbreakable.
ZKRYPT delivers AES-256 end-to-end encryption for both messaging and email. Zero knowledge. No accounts. No servers. No traces — ever.
Choose Your Shield
ZKRYPT encrypts your conversations. ZKRYPT Mail encrypts your emails. Together, your entire digital communication is protected.
Send messages, files, and media with military-grade encryption. Your contacts are stored locally — no server ever sees your data.
Send encrypted emails to anyone. End-to-end protected from send to open. No email provider can read your messages.
Built Different. By Design.
Every feature exists for one reason: to make your private life impossible to intercept.
Zero Knowledge Architecture
We have absolutely no access to your messages, contacts, or identity. Our servers are designed to know nothing.
No Account Required
No email, no phone number, no username. Just open the app and generate your cryptographic identity instantly.
Screenshot Protection
FLAG_SECURE is enforced at the OS level — no screenshots, no screen recordings, no previews in the task switcher.
Cryptographic Identity
Your identity is a unique key pair generated on your device. Share your public key. Keep your private key local.
Self-Destruct Messages
Set messages to auto-delete after reading. Leave no trace on either device once the timer expires.
Biometric Lock
Protect app access with your fingerprint. Falls back gracefully to 6-digit PIN on unsupported devices.
Open Protocol
Built on standard cryptographic primitives — X25519, AES-256-GCM, HKDF-SHA-512. No proprietary black boxes.
Instant Push Delivery
End-to-end encrypted push notifications delivered in real time. You get notified without the server knowing why.
Local-First Storage
All data lives on your device. No cloud sync, no backups to external servers. You own your data completely.
Privacy in 3 Steps
No configuration. No IT department. Just open, generate, and go.
Download the App
Get ZKRYPT or ZKRYPT Mail directly from this website or Google Play. No sign-up flow. No terms to scroll through.
Generate Your Identity
On first launch, your device generates a unique cryptographic key pair locally. Your private key never leaves your phone.
Start Communicating
Share your public key with a contact. Every message is encrypted on your device before transmission. Nothing in between can read it.
The Math Doesn't Lie.
We use the same cryptographic standards trusted by governments, banks, and the world's most secure institutions.
Cryptographic Stack
Elliptic-curve Diffie-Hellman for forward-secret key agreement
Authenticated encryption with associated data (AEAD)
HMAC-based key derivation for session keys
Integrity verification on every message
No cloud sync, no server-side storage, no backups
No accounts, no credentials, no identity servers
What We Guarantee
Pay Once. Own it Forever.
No subscriptions. No recurring fees. One payment, lifetime access. Your activation code is emailed instantly.
- ✓E2E encrypted messaging
- ✓No account or signup
- ✓Fingerprint + 6-digit PIN lock
- ✓Screenshot protection
- ✓Contact-level encryption
- ✓12-hour message expiry
- ✓Lifetime license
- ✓Everything in ZKRYPT
- ✓Everything in ZKRYPT Mail
- ✓Encrypted messaging
- ✓Encrypted email
- ✓One code for both apps
- ✓Lifetime license
- ✓Priority support
- ℹ️Mail: internal network — between ZKRYPT users only
- ✓E2E encrypted email
- ℹ️Internal network — between ZKRYPT users only
- ✓No account or signup
- ✓Fingerprint + 6-digit PIN lock
- ✓Light & dark mode
- ✓Push notifications
- ✓Screenshot protection
- ✓Lifetime license
🔒 Secure checkout via Stripe · Activation code emailed instantly · Lifetime license · No subscription ever
Your conversations deserve real privacy.
Stop trusting platforms that profit from your data. Take control with end-to-end encryption that works by default.