| Freedomsat | Hampshire |
| FreeFlow Technologies | |
| Freelance Design and Graphics | West Sussex |
| Freelancers.net Ltd | Berkshire |
| Freeman and Clarke Ltd | |
| Freeola Ltd | Essex |
| Freeside Media Ltd | |
| Freestart plc | |
| Freestyle Interactive Ltd | |
| Freestyle Internet Services Ltd | |
| Freestyle IT | Hampshire |
| Freestyle Web Design Ltd | |
| Freethought Internet Ltd | Lincolnshire |
| Freetimers | Northamptonshire |
| Freetrade | Greater London |
| Freevolt Technologies Ltd | |
| Freeway Projects Ltd | Devon |
| Freewebstore Ltd | |
| Fresh Biz Marketing | West Yorkshire |
| Fresh Egg | West Sussex |
| Fresh Frog Marketing | |
| Fresh Group | |
| Fresh Interactive | East Sussex |
| Fresh Labs Group Ltd | |
| Fresh Mango Technologies UK | |
| Fresh Milk Software | |
| Fresh Technologies | |
| Fresh Websites | |
| Fresha | |
| FreshMinds Talent Ltd | |
| Freshspace Ltd | Cumbria |
| FreshWebz | Essex |
| Frez Systems Ltd | Dorset |
| Friend Computers | Devon |
| Fringe Electronics | Nottinghamshire |
| Frink Design Ltd | |
| frnt | |
| Frog Capital Ltd | |
| Frog Education | West Yorkshire |
| FROG IT Services Ltd | Cambridgeshire |
| Frog Systems | |
| Frogjuggler Ltd | |
| Frogspark | |
| Front Page Advantage | Hampshire |
| Front Page Design | Glasgow |
| Frontend Focus | |
| Frontendlabs | |
| Frontier Code | |
| Frontier Developments, Inc. | Cambridgeshire |
| Frontier Software plc | |