| Blockchain Africa Conference | |
| Blu Flamingo | Gauteng |
| Blue Apple | |
| Blue Box | Western Cape |
| Blue Cabin SEO Company | |
| Blue Chip Computers | KwaZulu-Natal |
| Blue Forest Productions | |
| Blue Label Telecoms Ltd | Gauteng |
| Blue Sky Satellite Communications | |
| Blue Stallion Technologies CC | Gauteng |
| Blue Turtle | |
| Bluebird | Western Cape |
| Bluegrass Digital | Western Cape |
| Bluejeans IT Solutions | Gauteng |
| BlueLight Webdesign | |
| BlueMagnet | Gauteng |
| BlueSteam | Western Cape |
| Blugecko | Gauteng |
| BluShift | |
| BluWave Software | Gauteng |
| BNRY Digital | Western Cape |
| BOHN management systems | Western Cape |
| Boland College | |
| Booksure | Western Cape |
| Borake Netserve (Pty) Ltd | Northern Cape |
| Boston City Campus | |
| Bounce Design | Western Cape |
| Brainstorm Tech Solutions | |
| Braintree | Gauteng |
| Brand Candy | |
| Brandbook | Gauteng |
| BrandHeart | |
| BrandSchool | Gauteng |
| BrandsEye | Western Cape |
| Brandsplash (Pty) Ltd | |
| BrandXtreme | Gauteng |
| Brayfoil Technologies | Gauteng |
| Breakpoint | Western Cape |
| Breeze Website Designers | Gauteng |
| Bright On Capital | |
| Broadband Infraco | Gauteng |
| Bruce Merry | |
| BSG Africa (Pty) Ltd | Western Cape |
| BSolve | Western Cape |
| BT Games | Gauteng |
| BTec Consulting | KwaZulu-Natal |
| Buffalo City College | |
| BUI | Gauteng |
| Build Marketing | |
| Bullion IT | Gauteng |