| The Software Bureau Ltd | |
| The Solution Automotive Ltd | |
| The Spark Angels | Northamptonshire |
| The Stack World Ltd | |
| The Startup Guys | |
| The Startup Pill | |
| The Startup Race | |
| The Studio & Liverpool Life Sciences UTC | |
| The Studio 4 | |
| The Tech People | |
| The Technology Academy | Hampshire |
| The Telecom Shop | West Sussex |
| The Timebank | Herefordshire |
| The Total Package Ltd | Kent |
| The TRICAPITAL Syndicate, LLP | |
| The UK Web Design Company Ltd | |
| The Unitel Direct Group | County Durham |
| The Very Good Email Company | Hertfordshire |
| The Virtual Forge Ltd | |
| The Visual Works | Shropshire |
| The Web Builder | Lincolnshire |
| The Web Bureau Ltd | Belfast |
| The Web Company | Highland |
| The Web Site Hosting Company UK | West Midlands |
| The Web Taylor | Hampshire |
| The Website Company UK Ltd | |
| The Website Factory London | Greater London |
| The Website People | South Yorkshire |
| The Websitemen | Devon |
| The Zen Agency | Glasgow |
| The Zen Agency | |
| TheDigitalGene | |
| theEword | Greater Manchester |
| thefullworks Ltd | |
| thefutureworks | |
| TheGamery Ltd | |
| Theolytics | |
| Theorem Solutions | Staffordshire |
| Theragnostics Ltd | |
| Therakind | |
| Theramex | |
| Therapy Webs | |
| Thermocable (Flexible Elements) Ltd | West Yorkshire |
| Theta Trading Systems Ltd | |
| TheTin | Greater London |
| TheWaay | |
| TheWebsiteGroup | Hertfordshire |
| TheWebSmiths | Cheshire |
| THG plc | |
| ThingCo Ltd | |