| Texelate Ltd | West Yorkshire |
| TexEng Software Ltd | |
| Texifier | |
| Text-Connect Ltd | Shropshire |
| TextAnywhere Ltd | Nottinghamshire |
| Texthelp Ltd | Antrim and Newtownabbey |
| Textmagic Ltd | |
| Textmimedia Ltd | Greater Manchester |
| TextMine Ltd | |
| TextPad | Lancashire |
| TextRazor Ltd | |
| Texts | Oxfordshire |
| Teysha Technologies | |
| TFA | |
| TFI Web Design | |
| Tformat Ltd | Wiltshire |
| TG Systems (UK) Ltd | Bedfordshire |
| TG0 | |
| TGC Computers Ltd | West Yorkshire |
| TH-EY | |
| th4ts3cur1ty.company | West Sussex |
| Thallo | |
| Thames Gateway Manufacturing Centre Ltd | Greater London |
| Thames Infotech | |
| Thames Technology | |
| Thames Web Design | |
| Thanks Ben Ltd | |
| That Production Studio Ltd | |
| That Web Look | |
| The 3rd One Group | |
| The Access Group | |
| The ACS Group | South Yorkshire |
| The Ad Plain Ltd | |
| The Alpha Designs | |
| The App Chaps | |
| The App Developers | |
| The App Office | |
| The Apprentice Academy | |
| The Armstrong Partnership Ltd | Cheshire |
| The Art Department | Cambridgeshire |
| The Artlab | |
| The Backscratchers Ltd | |
| The Bakery | |
| The Barcode Business | Newport |
| The Barcode Warehouse Ltd | Nottinghamshire |
| The Barn Agency | |
| The Base Mesh | |
| The Big Lime Ltd | |
| The Bigger Boat | |
| The Black And White Agency | |