| Boris Software Ltd | |
| Born | |
| Born Creative Ltd | |
| Boss Digital | Buckinghamshire |
| BossLabs Ltd | |
| Bot-Hive | |
| BotCore | |
| Bottlepay Ltd | |
| Boundary IT Services | West Sussex |
| Bourne Capital | |
| Bourne IT Services | |
| Bournemouth University | Dorset |
| Bournemouth University - Faculty of Media, Science & Technology | Dorset |
| Bow House Digital Ltd | |
| Bowden Digitec | |
| Bowe Digital Ltd | Tyne and Wear |
| Bowers Semiconductors | Greater Manchester |
| Bowland IT | |
| Bowler Hat | West Midlands |
| Bowman | |
| Bowood Electronics Ltd | Derbyshire |
| Box Ltd | West Midlands |
| Box Network Solutions | |
| Box Technologies Ltd | Oxfordshire |
| Box UK | |
| Boxclever | Bedfordshire |
| Boxharry Ltd | East Sussex |
| Boxhead | |
| Boxphish Ltd | |
| boxportable Ltd | Aberdeenshire |
| BoxStuff Ltd | Isle of Wight |
| BOXT | |
| Boxtobox | |
| BoxTop Technologies | |
| Boxwell Web Design | |
| Boyd Consultants | |
| Boyd Digital | Glasgow |
| Bozboz | East Sussex |
| BPC Circuits Ltd | Leicestershire |
| BPP Holdings Ltd | |
| BPS Designs | Lancashire |
| BPWEB | Berkshire |
| BR-DGE | |
| Braci1 Ltd | West Midlands |
| Bracknell 3D Printing | |
| Bradford College | |
| Bradford PC Repair | |
| Bradling Security Ltd | |
| Bradly Associates Ltd | Berkshire |
| BradSpace | |