| Name | Region |
|---|---|
| BMW Innovation Lab | |
| BN1 Digital | |
| Board Intelligence Ltd | Greater London |
| Boardwalk Studio | |
| Boargworks | |
| Bob Design & Marketing Ltd | Bristol |
| Bob's Business | South Yorkshire |
| Bodet Ltd | Hertfordshire |
| Bodi.Me | |
| Bodynet UK | |
| Bodyswaps | |
| BOE Information Systems | |
| Boiler Room Digital | South Yorkshire |
| Boilerhouse Creative | |
| Bold Endeavours. | Surrey |
| Bold Internet Ltd | Hampshire |
| Bold Web Design & Hosting | |
| Boldon James Ltd | Hampshire |
| Boldyn Networks | |
| Bolland | |
| Bolster Systems Ltd | |
| Boltzbit | |
| BOM Group Ltd | Bristol |
| BondAval | Greater London |
| Bondgate IT Services Ltd | County Durham |
| Bondline Electronics Ltd | Wiltshire |
| Bondo & Coiyne | |
| Bongo IT | |
| BONI Technology Ltd | |
| Bonnet Ltd | |
| Boodil Ltd | |
| BookingLive | |
| BookNow Software | |
| BooksoniX | Kent |
| Bookster | |
| Bookwhen Ltd | |
| Boom Online Marketing | |
| Boom Solutions Ltd | |
| BoomFi Ltd | |
| Boonwag Ltd | |
| Boords | |
| Boost Pixel Ltd | |
| Boost Technology | |
| BoostOnline UK Group Ltd | Kent |
| Bootcamp Media | |
| Bordaline Web Design | Suffolk |
| Border Computer Systems | |
| Border Webworks Ltd | |
| Borealis Software Ltd | |
| Borer Data Systems Ltd | Berkshire |