| Name | Region |
|---|---|
| Joom.team | |
| Joomla Wired | Essex |
| Joos App | |
| Joret Software Ltd | Norfolk |
| Josh.biz | |
| Joshua Wolfe | |
| Joto | |
| Journai | |
| Journalmind Ltd | |
| Journey Holdings Ltd | |
| Journey Ltd | |
| Journi Ltd | |
| JOYdevs Ltd | |
| Jozef Hindicky, MSc | |
| JP Web Solutions | |
| JPad.io | |
| JPC InfoNet Ltd | Wiltshire |
| JPcreates | |
| jpeps Web Design Shrewsbury | Shropshire |
| JPJ Computers | |
| JPR Electronics | Bedfordshire |
| JPS Media Ltd | |
| JR Consultants | |
| JRA Computer Services | North Yorkshire |
| JRAH Computing | South Yorkshire |
| JS Web Dev | |
| JS Website Designs | Somerset |
| JSE Computing Ltd | |
| JSP Media | Shropshire |
| JT Global | Channel Islands |
| JTC plc | |
| Juan Fernandes | |
| Jubilee Electronics Ltd | Nottinghamshire |
| Jugo | |
| Jugo Systems | |
| Juiced Media | Suffolk |
| Juiced Media Ltd | |
| Julie Desk | |
| Jumar Technology Ltd | West Midlands |
| Jump 2 IT Media | Derbyshire |
| JUMP Up Ltd | |
| Jump24 | |
| Jumpdata Ltd | |
| Jumping Bean Training | Edinburgh |
| Junction-18 | Glasgow |
| Jungle Marketing Ltd | |
| Juniper Place Investor Intelligence Ltd | |
| Juniper Research Ltd | Hampshire |
| Juniper Training | |
| Juno Bio | Greater London |