| ARCAD | KwaZulu-Natal |
| Arctic Edge | |
| Arctica Design | |
| Argeo Technical Services | Gauteng |
| Armada Consulting (Pty) Ltd | |
| Artificial Studio | Western Cape |
| Artis Turba (Pty) Ltd | |
| Ascent Technology | Gauteng |
| Ascentium Technologies (Pty) Ltd | |
| ASF Computing Services | Gauteng |
| ASIC Design Services | Gauteng |
| Aspen Holdings | |
| Aspiration Software | Gauteng |
| Aspire Solutions | Western Cape |
| Assemble | Gauteng |
| Astidian Systems | Gauteng |
| AstuteTech | |
| Atom Software | KwaZulu-Natal |
| Atomware | |
| Atotal | Gauteng |
| ATP Computer Consultants | Free State |
| Attrahent | Western Cape |
| Atura | Western Cape |
| Austrosoft | Western Cape |
| Auto Digital Technologies (Pty) Ltd | KwaZulu-Natal |
| AUX Studio | Western Cape |
| AV Technology Solutions CC | Western Cape |
| AV2 Systems | Western Cape |
| Avalanche Design | Western Cape |
| Avantcore (Pty) Ltd | |
| Avatar Agency Group | |
| AVG South Africa | Western Cape |
| Avision Africa | Western Cape |
| Awali Business Solutions | |
| Awethu Project | Gauteng |
| Axiz | Gauteng |
| Axon | Gauteng |
| Axxess DSL (Pty) Ltd | Eastern Cape |
| Azapi IT Services (Pty) Ltd | Western Cape |
| Aztech | Gauteng |
| Azure Designs | KwaZulu-Natal |
| Azuro Solutions | |
| B Online | |
| B&D System Engineers | Gauteng |
| B&Ti Solutions | Gauteng |
| B2E Technologies | Gauteng |
| B3 Media | Gauteng |
| BAARA Consulting | Gauteng |
| BancX | |
| Bandela Web Services | |