| Banner Ignition | Gauteng |
| Banter | |
| Barcode Technologies CC | KwaZulu-Natal |
| Bardin Ellis | Western Cape |
| BarnOwl | Gauteng |
| Batec | Gauteng |
| Baywood Technologies | KwaZulu-Natal |
| BBD | Gauteng |
| Bbit | North West |
| BCOM | KwaZulu-Natal |
| BCX | Gauteng |
| Beden Networks | Gauteng |
| Belgium Campus | |
| Berea Technical College | |
| Bermont Digital | |
| Bernstein Computer Consultants | Western Cape |
| Besttech | Gauteng |
| BET Software | |
| Bethesda Computers | Gauteng |
| Better Your Odds | Western Cape |
| Betterconnect | KwaZulu-Natal |
| BIAS Consultants | Gauteng |
| Big 5 distribution | Gauteng |
| Big Fish Development | Eastern Cape |
| BIG Media | Gauteng |
| Big Plan | KwaZulu-Natal |
| Big Web Media (Pty) Ltd | |
| Bika Open Source LIMS | Western Cape |
| BiomatrixSolutions | KwaZulu-Natal |
| BioTech Africa | Gauteng |
| Biotrace Software | Free State |
| Bisnet IT & Software Solutions | Eastern Cape |
| BitCo | Gauteng |
| Bitcube | Free State |
| Bite Web Solutions (Pty) Ltd | |
| BitFund | |
| BITLOGIQ | |
| Bits & Bytes CC | Gauteng |
| Bizco Business Consulting | |
| BiztechAfrica | Gauteng |
| Black Fig Jam (Pty) Ltd | Gauteng |
| Black Snow | |
| Black Snow Communications | Gauteng |
| Black Snow Digital | |
| Blackalsatian | Eastern Cape |
| Blacklight | Gauteng |
| Bladesight | |
| Blank Media | Gauteng |
| BlaqBerry | |
| Blaze Web Studio | KwaZulu-Natal |