Now in Early Access: live audio calls

Someone's at your door.
But you don't have to be.

Visitors scan the QR on your door and leave a message — text, photo, or voice. Live audio calls are in Early Access on Pro doors you turn them on for. No hardware, no app for them.

Create your KNOC See how it works

One Door free. Pro adds more Doors, longer history, and Early Access live audio calls.

A courier at a front door scanning a printed KNOC QR card at dusk.
QR code — scan to open KNOC on the App Store

Set up your first door in a minute.

Scan the code to install KNOC on your iPhone — or create your account on the web and print your QR.

Download on the App Store

How the QR doorbell works

  1. 1 Print your QRPut a KNOC code where visitors can find it.
  2. 2 Visitors scan & messageThey leave a message — no app, no account.
  3. 3 Reply from your phoneAnswer with text or voice. Your number stays private.
How it works →

No app for visitors · No hardware · No phone number shared · Privacy-first

What KNOC does, and what's next

Available Now

Things you can use today.

  • A QR code on your door. Visitors scan it and reach you — no app, no account for them.
  • Text, photo, and voice messages, with your phone number kept private.
  • Reply from your phone or the web.
  • More Doors and longer conversations on Pro.

In Development

Nothing we're ready to announce here yet.

Exploring

Ideas we're considering. Not promised.

  • Live video calls.
  • Weatherproof, branded KNOC door decals.
  • Apartment and multi-unit routing.
  • Optional WhatsApp updates for visitors.