About QryptChat

QryptChat is a quantum-resistant, end-to-end encrypted messaging platform built by Profullstack, Inc. (founded 2024). It uses ML-KEM-1024 (CRYSTALS-Kyber) and CRYSTALS-Dilithium — NIST-approved post-quantum algorithms — so your conversations stay private against both today's attackers and tomorrow's quantum computers.

Our mission

Most messengers were designed for a world without quantum computers. Encrypted traffic captured today can be stored and decrypted later once large-scale quantum hardware arrives — a “harvest now, decrypt later” attack. Our mission is to make communication that is private not just today but decades from now, using cryptography that is already standardized by NIST, and to keep it open source so anyone can verify and self-host it.

What makes QryptChat different

• Post-quantum end-to-end encryption using ML-KEM-1024 and CRYSTALS-Dilithium.
• Phone-number sign-up — no email address and no password required.
• Encrypted voice & video calls, disappearing messages, and file sharing.
• Open source under the MIT license and fully self-hostable.
• Accessible over Tor as a hidden service, plus a public warrant canary.

Team

• Anthony Ettinger — Founder & Developer
• mrpthedev — Developer

QryptChat is free and open source. See the code on GitHub, read our security overview, or get in touch.