| Geeklab | |
| Gendel Strategic Marketing Group | Gauteng |
| GenSix Digital | Western Cape |
| GEO Data Design | Western Cape |
| GeoSpace International (Pty) Ltd | Gauteng |
| Geotab | Gauteng |
| GetSmarter | Western Cape |
| GetWeb | Western Cape |
| GIGtech | Gauteng |
| Gijima (Pty) Ltd | Gauteng |
| GindstoneXL | Western Cape |
| Gist (Pty) Ltd | Western Cape |
| Givit Software and Web Design (Pty) Ltd | |
| Glacier Consulting | Gauteng |
| Glink | KwaZulu-Natal |
| Global Micro Solutions (Pty) Ltd | Gauteng |
| Global Sense | Gauteng |
| Global Software Services Pty Ltd | |
| Global Synapse | Western Cape |
| globalCom SA | Gauteng |
| Globex Internet Services | Gauteng |
| GlobSky ISP | Western Cape |
| GLS Consulting (Pty) Ltd | Western Cape |
| Gnu World | Western Cape |
| Go Rentals | Gauteng |
| Gold Creative | |
| Golden Smile Dark Heart | Western Cape |
| Goldtel Industries (Pty) Ltd | Gauteng |
| Good Things Marketing | |
| GoodX (Pty) Ltd | |
| GoodX Enterprises (Pty) Ltd | Gauteng |
| Gorilla Phones SA | Gauteng |
| GPS Online | |
| Gracan Communications | KwaZulu-Natal |
| Graffo (Pty) Ltd | |
| Grapevine | Western Cape |
| Graphic Image Technologies | Gauteng |
| Graphics Designer | Free State |
| Gravit8 | Western Cape |
| Graylink | Western Cape |
| Greenside Design Center | |
| Grey Pebbles Design Studio | Gauteng |
| Greycell | KwaZulu-Natal |
| Gridweb (Pty) Ltd | |
| GRiP | |
| Grunter Services | |
| Gsolutions | Western Cape |
| GuruHut | Gauteng |
| HaDeDa | |
| Haefele Software | |