Knock

Knock is an anonymous contact and waiting protocol that allows you to safely and politely contact others solely by scanning a QR code, without exposing your phone number or real name.

Communicate with peace of mind in various everyday situations, free from the fear of stalking, harassment, voice phishing, or personal information leaks!

[Key Features & Verticals]

Queue Waiting: When waiting at popular restaurants or stores, you can register by scanning a QR code instead of writing your number on a paper list, allowing you to wait comfortably elsewhere.

Parking: Using a secure QR code attached to the front of your vehicle, you can politely request the car owner to move their car without revealing your number.

Inter-floor Noise: Ask for understanding regarding noise via a polite message without causing offense to neighbors.

Pet: Attach an identification tag QR to your pet's leash so that if it is lost, the finder can notify the owner directly without revealing their number. Lost & Found Safe Knock: Attach QR tags to keychains, valuables, etc., allowing the finder to contact you safely in the event of a loss.

Various Other Safe Knocks: Applicable to all places in daily life where communication is necessary, such as bicycles, unmanned stores, mailboxes, and shared accommodations (Stay).

[Why Knock Is Safe]

No Personal Information Collected: Scanners (visitors/general users) do not require registration or even app installation, and no personal information, such as email addresses or phone numbers, is collected.

Enforced Polite Templates: When starting a conversation, instead of free-form text input, you can select and send only 'polite default template phrases' appropriate for the situation, blocking verbal abuse and stalking.

Anonymous Voice Calls: Anonymous voice calls are possible using in-app WebRTC technology without revealing your contact information.