| .ZA Domain Name Authority | Gauteng |
| 101 Digital Marketing | |
| 1021 Media | Gauteng |
| 10dot Cloud Security | KwaZulu-Natal |
| 10XE | Gauteng |
| 1807 Design | Western Cape |
| 1Designs Pty Ltd | Western Cape |
| 21 Digital Web Solutions | Western Cape |
| 22 On Sloane (Pty) Ltd | |
| 22seven Digital (Pty) Ltd | Western Cape |
| 24 Twelve Full Service Digital Marketing Agency | |
| 2Engage | |
| 2KO International | Western Cape |
| 2XL Digital Solutions | KwaZulu-Natal |
| 3 Way Marketing | Gauteng |
| 3G South Africa | Gauteng |
| 3Gi Internet Services | Gauteng |
| 3GS | Gauteng |
| 3rdSUN | Western Cape |
| 3SixT5 Design & Marketing | |
| 421 Online (Pty) Ltd | |
| 4Design Creative Media | Gauteng |
| 4Di Capital | Western Cape |
| 4POS Software | Gauteng |
| 4Sight Holdings | Gauteng |
| 4Uz | Mpumalanga |
| 5D Communications Design | Western Cape |
| A-Solutions | Gauteng |
| A4dable Software | Free State |
| Aarix Business Solutions | Gauteng |
| AAW Electronic Enterprises CC | KwaZulu-Natal |
| Abela iMali | |
| Aberdare Cables | Gauteng |
| Absol | Gauteng |
| Absolute Hosting | Gauteng |
| AC Ink Technology | Mpumalanga |
| Accfin Software | Gauteng |
| AccpickPos | KwaZulu-Natal |
| Accrue Websites | Gauteng |
| Accsys (Pty) Ltd | Gauteng |
| Acnode Group | Western Cape |
| ACTECH Software Asfrica | Gauteng |
| Action Hero Ventures (Pty) Ltd | |
| Active Cellular | Gauteng |
| Active Ice Digital | Western Cape |
| Active Media | |
| ActiveDNS | Western Cape |
| Acuity Consultants | Western Cape |
| Acute Solutions | Western Cape |
| Ad Dynamo International (Pty) Ltd | Western Cape |