Get the Knock Android App
Enjoy 1-tap dialing, native phonebook sync, and HD browser calling straight from your home screen.
Make 100% free voice & video calls without airtime using HD browser calling.
Consumers across Africa are mobile-first, but the cost of data and airtime is often the biggest barrier to access. Knock’s WebRTC engine removes that obstacle, enabling anyone to make direct, crystal-clear voice calls for free.
No airtime or mobile data needed. Open in Chrome or Safari and dial any South African mobile.
Engineered specifically for South African mobile networks and businesses.
Connect with friends, family, and businesses completely free using 256-bit encrypted WebRTC browser calls across all major SA networks (Vodacom, MTN, Telkom, Cell C).
Eliminate spam rejections. Provide your delivery drivers, field agents, and customer support team with verified, branded caller IDs so customers answer on the first ring.
Enjoy 1-tap dialing, native phonebook sync, and HD browser calling straight from your home screen.