| JustLogic | Gauteng |
| JustNow | Gauteng |
| JustPoS Technologies (Pty) Ltd | Gauteng |
| JustSolve | |
| K Design House | Gauteng |
| KAB Technologies | Western Cape |
| Kadabra by Doug Kemp | Western Cape |
| Kahlel Advertising | |
| Kaira Technologies (Pty) Ltd | KwaZulu-Natal |
| Kaitech | |
| Kaleidocode | |
| Kalkbay Interactive | Western Cape |
| Kalon Venture Partners | Gauteng |
| Kaomi (Pty) Ltd | |
| Kastim (Pty) Ltd | Western Cape |
| KATN Payroll | KwaZulu-Natal |
| KB Consulting SA | |
| Keatyr System Support | KwaZulu-Natal |
| Keybase Training Solutions | Gauteng |
| Keyline Graphics CC | KwaZulu-Natal |
| Khanyisa Real Systems (Pty) Ltd | Western Cape |
| Khula App (Pty) Ltd | Gauteng |
| Khusela Solutions (Pty) Ltd | Western Cape |
| Kindle Insurance Technology (Pty) Ltd | Gauteng |
| KingCom Holdings Pty Ltd | |
| Kingsley Technologie | Western Cape |
| Knife Capital | Western Cape |
| KnightsMultiMedia | |
| Knowledge Base | Western Cape |
| Koala Design | |
| Kolok | Gauteng |
| Konica Minolta South Africa | Gauteng |
| Konten | |
| Korwe Software (Pty) Ltd | Western Cape |
| KRAZYBOYZ digital | Western Cape |
| Kreonovo | |
| Kubumedia Agency (Pty) Ltd | |
| KVMTech | Gauteng |
| Kwikwap | Gauteng |
| KWK Computer Solutions CC | Gauteng |
| KYOCERA Document Solutions South Africa Pty Ltd | Gauteng |
| Kyocera Mita Western Cape | Western Cape |
| La dolce vITa | |
| La French Tech Cape Town - Johannesburg | Western Cape |
| Lampen Digital | Western Cape |
| Lamus Design | |
| LAR Africa Holdings (Pty) Ltd | |
| Lascom Management Systems | Gauteng |
| Laurus Media | Gauteng |
| Lead Optimizers | Western Cape |