Say anything.
Privately.

Encrypted messaging, voice calls, and secure sign-in — all in one beautifully simple app.

VaultChat welcome screen
Features

Everything you need to stay private.

Designed to be simple. Built to be uncompromising.

Private messaging

Every message is end-to-end encrypted on your device. Even we can't read them.

Crystal-clear calls

High-quality voice and video calls protected by forward-secret WebRTC encryption (DTLS-SRTP). We record only the metadata required to power missed-call notifications and your in-app call history — never the audio or video itself.

SMS verification

One-time codes and security alerts keep your account safe. No marketing, no bulk messaging — ever.

Your keys, your data

Private keys never leave your device. You own every conversation.

Minimal metadata

Your messages, voice, attachments, and reactions are end-to-end encrypted — we can never read them. We retain only the minimum routing data required to deliver them: sender, recipient, timestamp, and the push tokens we need to wake your device.

Biometric lock

Face ID and fingerprint guard your vault. Privacy you can feel.

Security

Encryption you can trust.

Engineered on open, well-studied cryptographic primitives — Double Ratchet, X25519, and XSalsa20-Poly1305 — implemented via the NaCl/tweetnacl library and standard WebRTC. Open protocols. No proprietary cryptography. No shortcuts.

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Double Ratchet protocol
Forward secrecy for 1:1 chats — open Double Ratchet design
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2
XSalsa20-Poly1305
Authenticated symmetric encryption (NaCl secretbox)
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3
Curve25519 / X25519
Elliptic-curve Diffie-Hellman key exchange
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4
DTLS-SRTP
Forward-secret transport for voice and video calls
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Be first to chat privately.

Available now on the App Store and Google Play.