| The Blog House Ltd | |
| The Blue Cube Communications Ltd | West Midlands |
| The Boutique Workplace Co | |
| The Brains | |
| The Brand Race | |
| The Brand Tailor | |
| The Braverhead | |
| The Building Block | |
| The Bunker | Kent |
| The Bureau EG Ltd | West Sussex |
| The Buro .net | Somerset |
| The Business Research Company | Greater London |
| The Business Show | |
| The Bytes Project | Belfast |
| The Carbon Trust | |
| The Cardiff Graphic Designer | |
| The Chain Agency | |
| The Channel Agency | |
| The Cheerful Lime Ltd | |
| The Chemistry Set | |
| The Chord Company Ltd | Wiltshire |
| The City SEO | |
| The Client Factory | Surrey |
| The Co-Foundry | |
| The Codest | |
| The Cogworks Ltd | |
| The Collective | |
| The Commerce Team Global | |
| The Communications Group | Oxfordshire |
| The Communicator Corporation Ltd | Tyne and Wear |
| The Conference Exchanges DEX | |
| The Consumables Depot | West Yorkshire |
| The Content Works | |
| The Courseware Shop | South Yorkshire |
| The Craft Consulting Ltd | Gloucestershire |
| The Creation Lab | Kent |
| The Creative Box | |
| The Creative Den | |
| The Credit Thing | |
| The Currency Analytics | |
| The Curve Consulting Services Ltd | |
| The Cyber Training Centre | |
| The Data Exchange | |
| The Data Lab | |
| The Debug Store | Denbighshire |
| The Dedicated Partnership Ltd | Cumbria |
| The Dental Marketer | |
| The Developer Network Ltd | |
| The Developers Group | Pembrokeshire |
| The DGIT Solutions Ltd | |