| IT-Reconnect | Gauteng |
| ITC Systems | KwaZulu-Natal |
| ITGuy.za.net | KwaZulu-Natal |
| iThemba LABS | |
| ITLogic Solutions | Western Cape |
| ITNT | Gauteng |
| ITQ Business Solutions | Gauteng |
| ITST | Gauteng |
| iTTCONNECT | Western Cape |
| ITTree Solutions | Gauteng |
| ITWeb | Gauteng |
| ITWeb Africa | Gauteng |
| iVeri Payment Technologies | Gauteng |
| Ixiom Digital Office Solutions | Gauteng |
| iXperience (Pty) Ltd | |
| Jabulani Design Studio | Gauteng |
| Jakcksons Computers | Gauteng |
| Jalia Technologies | Gauteng |
| Janus IT Solutions | Gauteng |
| Jasco Group | Gauteng |
| Jasper Computers | Gauteng |
| Jasper Consultants | Gauteng |
| Jasper Web | Gauteng |
| Jaycor International | Gauteng |
| JC Website Development & Hosting CC | KwaZulu-Natal |
| JDezigns | |
| Jem | Western Cape |
| Jendamark Automation (Pty) Ltd | |
| Jera Consulting | Gauteng |
| JICO Electronics CC | Gauteng |
| Jinjer | |
| JJ-Software | Western Cape |
| JMGrafixx Web Designers | Limpopo |
| Joburg Centre for Software Engineering | Gauteng |
| Johannesburg Polytechnic Pty Ltd | |
| John Deacon | |
| Jona Solutions | Gauteng |
| Joomla South Africa | |
| Joren | Gauteng |
| Jozi Angels | Gauteng |
| JoziHub | Gauteng |
| JQ Digital Marketing | |
| JSCafe | Western Cape |
| JSENT | KwaZulu-Natal |
| JT Software | Gauteng |
| Jumo | Western Cape |
| Jumo World | Western Cape |
| Jumping Bean | Gauteng |
| Just Pointblank | |
| Justin Whittaker | KwaZulu-Natal |