Security

Exactly what happens to your words

Privacy here isn't a setting you find or a promise you trust. It's the architecture.

On-device silicon
On your device

Your voice never leaves this Mac.

Speech becomes text on the Apple Neural Engine. No server, no round-trip, nothing in flight to intercept. Turn off Wi-Fi and it works exactly the same.

No cloud transcription, on any tier.
The audio buffer is scrubbed the instant it becomes text.

On your device

Captured, transcribed, and sealed without ever leaving your Mac.

On-device AI

Speech runs on your Mac's Neural Engine. No cloud, no server, no round-trip.

Encrypted at rest

Every note sealed with XChaCha20-Poly1305, keyed with Argon2id. The only plaintext is a random id.

Secure Enclave keys

Keys born on your device, released only by your Touch ID. We never receive them.

Scrubbed from memory

Audio is overwritten in RAM the instant it's text, and the app blocks its own crash dumps.

Typed, never pasted

Delivered as synthesized keystrokes, straight where you're focused. Never touches the clipboard.

Crypto-shred delete

Deleting destroys the key. The ciphertext is mathematically gone, not marked deleted.

Privt
Zero-knowledge sync

A vault we can't open.

Turn on Pro backup and your notes are sealed on your Mac before they ever reach us. Our servers hold only ciphertext. Your passphrase never leaves your device, so we can't reset it, read it, or be made to hand it over.

When you sync

Optional Pro backup, built so we hold nothing we could read, lose, or be forced to hand over.

Zero-knowledge sync

Notes are encrypted on your Mac before they ever reach us - our servers store only sealed blobs. Your passphrase never leaves your device; we can't reset it, because we never have it.

Privt ID

A keyring we can't open. No email, no password on our side - just an 8-character ID. Nothing to phish, nothing to leak in a breach.

A locked vault still catches

Lock the app and it goes write-only. A meeting that ends while you're away still lands, sealed to a key only your next Touch ID can release.

Burn code

Two word-pairs, from any browser, destroy every key we hold and wipe each device the next time it's online. No confirmation, no undo - we can't stop it either.

Burn

Destroy everything, from any browser.

Two word-pairs wipe every key we hold and erase each device the next time it comes online. No confirmation, no undo. We can't stop it either.

Don't trust us. Verify.

Every download is signed with our Developer ID and notarized by Apple. Check it yourself, locally.

# prove the app is ours, and unmodified
codesign -dv --verbose=4 "Privt Voice.app"
Authority=Developer ID Application: TEMPUL PTY LTD (C69R3796JF)
spctl -a -vvv -t install "Privt Voice.app"
accepted - source=Notarized Developer ID

We cannot read your content. Enforced by architecture, not policy.

Read the full cryptographic design ›