The secure messaging app that assumes everyone is listening.
They're watching. Every message.
Hey, can you send me the account details?
10:42 AM
Sure, the password is Summer2024!
10:43 AM
Got it. What about the PIN?
10:44 AM
It's 4729. Don't share this with anyone.
10:45 AM
Without encryption, every keystroke is exposed.
A secure messaging app by construction, not by promise
Security claims are easy. Here's how NoChat actually enforces them at the protocol level.
Zero-Trust Server
The server stores encrypted blobs, routes them, and nothing else. No plaintext ever touches our infrastructure.
Authenticated Encryption
AES-256-GCM is an AEAD cipher — tampering is detected automatically, so a compromised network can't silently alter messages.
Post-Quantum DMs
Direct messages derive their session key through a hybrid X25519 + ML-KEM (Kyber-1024) exchange, so a future quantum adversary can't unwrap today's captured DMs. Groups and calls are on the roadmap.
Auditable & Standards-Based
Built on open, standardized cryptography — no homegrown crypto. Don't trust our word; the primitives are public and documented.
Built on auditable, standards-based cryptography. How we secure it
A secure messaging app
that uses the cryptography governments trust
NoChat uses the exact post-quantum primitives selected by NIST for federal use — ML-KEM (Kyber-1024) for direct-message key exchange and ML-DSA-65 (FIPS 204) for signatures — alongside battle-tested AES-256-GCM. No homegrown crypto, no hand-waving.
NIST Approved Standards
The same cryptography the US government will use
ML-KEM
Key encapsulation
ML-DSA
Digital signatures
Harvest Now, Decrypt Later
Why this matters today, not tomorrow
Nation states are already storing encrypted communications. When quantum computers arrive, they'll decrypt years of captured data instantly.
Most mainstream messengers — including WhatsApp and Telegram — still don't offer post-quantum messaging. NoChat ships post-quantum key exchange for your direct messages today.
secure messaging app: questions, answered
Common secure messaging app questions, answered plainly.
What makes a messaging app truly secure?
What threat model does NoChat protect against?
Is NoChat the most secure messaging app available?
Has NoChat been audited?
How is NoChat protected against a server breach?
Can law enforcement get my messages from NoChat?
What secure messaging app features matter most?
Does NoChat cost money?
Ready to go dark?
Get NoChat for iPhone & Android
No account required. No ads, no data sold. No compromises.
Desktop apps
Dispatches on private messaging
Reporting on encryption, anonymous messaging, and what it takes to build a secure messaging app with no phone number required.
Also worth reading
encrypted messaging app
NoChat is an encrypted messaging app with end-to-end encryption and post-quantum key exchange for direct messages. Anonymous sign-up, zero knowledge storage, no phone number required.
Learn morezero knowledge messaging
NoChat is a zero knowledge messaging app: your keys stay on your device, the server stores only ciphertext, and we mathematically cannot decrypt your messages.
Learn morepost-quantum encryption messaging
Post-quantum encrypted messaging using ML-KEM (Kyber-1024) + AES-256-GCM. No phone number required. Protect DMs against harvest-now-decrypt-later attacks. Free, open source.
Learn moreJoin the quiet ones
Join a community that values privacy over convenience.
No phone number, no tracking ID
Sign up anonymously. There's no number to link your conversations back to you.
Encrypted on your device
Messages are sealed with AES-256-GCM before they leave your device. The server only ever sees ciphertext.
Verify, don't trust us
Built on open, standardized cryptography — no homegrown crypto. Verify our claims against public standards instead of taking our word for it.