Knock converts South Africa's wholesale carrier interconnects into high-value sponsored free phone calls. Below are the 8 battle-tested commercial models that unlock multi-million Rand CSI pledges, high-volume CPL call center budgets, and township SME adoption with 60% to 76% gross margins.
Direct-response call centers pay R0 for impressions. They only pay R25.00 when a caller listens to the 6s audio commercial, presses [ 1 ], and requests an immediate sales callback.
"You pay R0 for impressions. Only pay R25.00 when a subscriber actively opts in for a loan/insurance callback with full POPIA compliance and instant CRM webhook delivery."
For JSE-listed Banks & Insurers (Capitec, Discovery, Old Mutual). Billed against a Purchase Order with a strict Monthly Lead Hard-Stop and automated Net-30 tax invoicing on the 25th.
"We integrate with your standard procurement terms. Sign an MSA with a monthly PO cap. Our platform auto-stops at your limit and issues an audited month-end PoP tax invoice on Net-30 terms."
Billing: Net-30 Days MSAHard-Stop: Auto-CutoffBank Sync: FNB Auto-Match
Capture 1% NPAT SED budgets from Standard Bank, Sasol, and Anglo American. Delivers 5 B-BBEE SED points, SARS Section 18A tax deductions, and King IV cryptographic telemetry.
"Help 1 Million Underprivileged South Africans stay connected to jobs, family, and clinics by sponsoring 10 Million Free Call Minutes. Includes Section 18A tax shield and B-BBEE SED points."
B-BBEE: 5 Full SED PointsSARS: 100% Sec 18A DeductibleAudit: King IV Cryptographic
Local spaza shops, driving schools, and taverns in Soweto, Khayelitsha, and Umlazi sponsor 500–1,000 free calls. 6-second audio bumpers are strictly geo-fenced to local cell towers.
"Sponsor 500 free calls in your township for only R250. Every caller in Soweto hears your business name before their call connects. Instant PayShap/Card activation."
Youth and lifestyle brands (Red Bull, Castle Lite, Hollywoodbets) sponsor 1-on-1 calls with top influencers. The sponsor covers host payouts and telco minutes for 100% brand engagement.
"The first 500 fans who call my Knock link get a 100% Free 5-minute call, fully paid for by Castle Lite! Sponsor receives audio intro, co-branded room, and viral social reach."
Format: 1-on-1 HD WebRTCHost Payout: Escrow ReleasedSponsors: Red Bull, Castle Lite
Zero-cost user acquisition via USSD *134*56625# and QR decals in minibus taxi headrests. Post-call audio prompts turn every call receiver into a new daily caller.
"You just received a free call powered by Knock.at. Dial *134*56625# or click knock.at to make your own free calls without airtime."