| IT Rockstars | |
| IT Schools Africa | Gloucestershire |
| IT Security Guru | Greater London |
| IT Service Ltd | Tyne and Wear |
| IT Services (Grimsby) Ltd | Lincolnshire |
| IT Services Bristol Ltd | Bristol |
| IT Services Support Ltd | West Midlands |
| IT Simplified Ltd | West Sussex |
| IT Soho | Greater London |
| IT Solutions Site Ltd | Cardiff |
| IT Specialists | |
| IT Support (UK) Ltd | Greater London |
| IT Support Berkshire Ltd | |
| IT Support Bracknell | |
| IT Support Desk Ltd | Surrey |
| IT Support for Small Businesses in London | Hertfordshire |
| IT Support Partners | Cambridgeshire |
| IT Telecoms & Security | |
| IT Trading UK Ltd | Wiltshire |
| IT Training Solutions Ltd | County Durham |
| IT West Ltd | Cornwall |
| IT Works Ltd | Isle of Man |
| IT's Easy Training | Tyne and Wear |
| it'seeze | |
| it'seeze Ashford | |
| it'seeze Web Design & Management | Buckinghamshire |
| it'seeze websites | Devon |
| IT-Solution Ltd | Leicestershire |
| IT-Vault | |
| IT.com | |
| IT247NW Ltd | |
| IT4profit Ltd | Berkshire |
| IT@Spectrum | East Riding of Yorkshire |
| ITAL Group | |
| Itarus Ltd | |
| ITC UK | |
| ITCS (UK) Ltd | Bridgend |
| ITDWX Ltd | |
| iTec 32 Ltd | Essex |
| ITEC Connect Ltd | Bristol |
| iTech (Scotland) Ltd | |
| iTech Repair Ltd | Leicestershire |
| itecopeople | Gloucestershire |
| iTek I.T. Solutions Ltd | Essex |
| Itek Systems Management | Fife |
| ITEL Solutions Ltd | |
| iThink265 | |
| ithinki | |
| Itineris Ltd | Suffolk |
| ITJobsWatch | Cheshire |