| Graph Aware Ltd | Greater London |
| Graph Digital Ltd | |
| Graphcore | Bristol |
| Graphene Digital Marketing | |
| Graphic Design London | |
| Graphics Bite Ltd | |
| Graphics Workshop | Hampshire |
| GraphicsLink | Hertfordshire |
| GraphicVent | |
| Graphite Partners | |
| Grasp | Greater London |
| Grassroots Recruitment | |
| Gravitai Ltd | |
| Gravity Digital Ltd | Derbyshire |
| Gravity Media | |
| Gravity Road Ltd | |
| Gravitywell | Bristol |
| Gray Associates | South Yorkshire |
| Graymatter Ltd | Buckinghamshire |
| Great Ape Digital Ltd | |
| Great State | |
| Great Web Company Ltd | Glasgow |
| Greatbear Audio & Video Digitising | |
| Greatergood | |
| Green Angel Syndicate Ltd | |
| Green Bioactives Ltd | |
| Green Business Journal | |
| Green Cloud Hosting | |
| Green Dog Media | Derbyshire |
| Green Duck | Suffolk |
| Green Fulfilment | |
| Green Gecko Digital | |
| Green Gorilla Apps Ltd | |
| Green ISP | West Yorkshire |
| Green Lemon Caompany | |
| Green Man Gaming Ltd | |
| Green Orb Web Design | |
| Green Parrots Software | |
| Green Pea Agency | |
| Green17 | |
| Greenacre Computer Services Ltd | |
| GreenCity Solutions | Cambridgeshire |
| Greener | |
| Greengage Agritech Ltd | |
| Greengage Global Hoding Ltd | |
| Greenhouse Communications | |
| Greenhouse Graphics Ltd | Hampshire |
| Greenhouse School Websites | Greater London |
| Greenhouse Websites | Greater London |
| Greenlight Computers Ltd | Greater Manchester |