| BCH Digital Ltd | Greater Manchester |
| BCN Group | Cheshire |
| BCP Software | Greater Manchester |
| BCS Computers Ltd | Devon |
| BCTec | Kent |
| BDQ | Greater London |
| BDR Group | Warwickshire |
| BDS Solutions | Devon |
| Be Applied Ltd | |
| Be Creative Design Ltd | Cumbria |
| Be-IT Ltd | |
| Béa Fertility | |
| Beachshore Design Ltd | Kent |
| Beacon Capital Advisors, LLP | |
| Beacon Capital Solutions Ltd | |
| Beacon Cloud Technology Ltd | |
| Beacon Computer Technology | Cambridgeshire |
| Beacon Dodsworth Ltd | North Yorkshire |
| Beacon Website Design | |
| Beam Digital and Design Ltd | |
| Beaming Ltd | East Sussex |
| Beampipe | |
| Beanstalk Studio | Surrey |
| Bear IT | Nottinghamshire |
| Beauchamp Web Design | Leicestershire |
| Beauhurst | |
| Beauport Partners | |
| BEC (System Integration) Ltd | Lancashire |
| BEC Leaps UK CIC | |
| Becoms Ltd | Dorset |
| Bedford Consultancy Services Ltd | |
| Bee Software | |
| Bee Web Design | Highland |
| Beechman & Co. | Somerset |
| Beehive Research Ltd | |
| Beem | |
| Beem | Greater London |
| Beep Digital Ltd | |
| Beetlebrow Web Design | Wiltshire |
| Beework Web Design | Bristol |
| Beezapps | |
| Begbroke Science Park | Oxfordshire |
| Behavioural Insights Team | |
| Behold.ai Technologies Ltd | |
| Bela Electronic Designs Ltd | Bedfordshire |
| Belfast Metropolitan College | |
| Believe.digital | |
| Bell's Healthcare | Cheshire |
| Bella Design & Marketing | Cheshire |
| Bellrock Technology Ltd | |