Why Choose QryptChat?
Built for the future of secure communication
01
Post-Quantum Cryptography
Uses ML-KEM-1024 (CRYSTALS-Kyber) and CRYSTALS-Dilithium algorithms approved by NIST for quantum resistance.
02
Phone Number Authentication
Simple and secure registration using your phone number with SMS verification.
03
🔐 Encrypted Voice & Video Calls
Crystal-clear 1:1 and group calls protected with ML-KEM-1024 post-quantum encryption.
04
Real-time Messaging
Instant message delivery with typing indicators and read receipts.
05
Multi-language Support
Available in multiple languages with full internationalization support.
How QryptChat Works
Private by design — no email, no passwords, no message access.
- Register with a phone number. A one-time SMS code verifies you — no email address and no password to leak.
- Keys are generated on your device. Your ML-KEM-1024 key pair never leaves your device, so QryptChat cannot read your messages.
- Every message is encrypted end-to-end. Text, files, and voice & video calls are protected with NIST-approved post-quantum algorithms.
- Stay private, everywhere. Use QryptChat on the web or over Tor, and self-host it from the open-source (MIT) repository.
Built for privacy-conscious individuals, journalists, activists, and security-minded teams who need communication that stays private even against future quantum computers.