| Blueberry Consultants Ltd | West Midlands |
| Blueberry Software Ltd | West Midlands |
| Bluebit | Hampshire |
| Blueclaw | West Yorkshire |
| Bluecube Technology Solutions | Buckinghamshire |
| BlueCubes | Ards and North Down |
| Bluefield Geoservices | |
| BlueFinity International | Hertfordshire |
| Bluefish Computer Services | West Sussex |
| Bluefish Web Solutions | East Riding of Yorkshire |
| Bluefrog Design Ltd | |
| Bluefruit Software Ltd | Cornwall |
| BlueGoose | Isle of Man |
| BlueGreen Clinical | |
| BlueGreen Internet Marketing | Cheshire |
| BlueHatch Consultancy Ltd | |
| Bluehoop Digital Ltd | |
| Bluehorn Technologies | |
| BlueIce Graphic Design | |
| BlueJ | Kent |
| Bluejays PC Services | Greater London |
| Bluelinemedia Ltd | Gloucestershire |
| BlueOptima | |
| Bluepoint Corporation Ltd | Buckinghamshire |
| BluescreenIT | Devon |
| Blueshift Internet | Somerset |
| Blueshift Memory | |
| BlueSky Travel Systems Ltd | Greater Manchester |
| Bluesmith Information Systems Ltd | |
| BlueStar-UK.com Ltd | Nottinghamshire |
| Bluestorm | |
| Bluestorm Design & Marketing Ltd | |
| BlueTea Ltd | |
| Bluetel Solutions Ltd | |
| BlueTree Website Design Ltd | Bristol |
| BlueTrendy Ltd | |
| Blueverse Ventures | |
| BluGem Communications Ltd | Devon |
| Blumin | |
| Blumont Pharma Ltd | |
| Blundell Apps | |
| Blundell Production Equipment Ltd | West Midlands |
| bluQube | Bristol |
| BMB Web Design | Dorset |
| BMDC | |
| BME Imaging | Berkshire |
| BMG Research Ltd | |
| BMLL Technologies | |
| BMSoftware & Computer Hardware | Norfolk |
| BMT Cordah Ltd | Aberdeen |