| Gaya, s.r.o. | Žilina |
| GeCom, s.r.o. | Košice |
| Gemtech, s.r.o. | |
| Gettpal, s.r.o. | |
| GIRU, s.r.o. | |
| Glycanostics, s.r.o. | |
| Gnome Ltd | Bratislava |
| Golden Gates, s.r.o. | |
| GoodRequest | |
| GOPAS SR, a.s. | Bratislava |
| Gordias, s.r.o. | Bratislava |
| Gospace Tech | |
| GPS NTP | Bratislava |
| Grain Slovakia, s.r.o. | |
| Gratex International, a.s. | Bratislava |
| Green Energy Slovakia, s.r.o. | |
| Green Mushroom | Bratislava |
| GreenWay Infrastructure, s.r.o. | |
| GREXOFT, s.r.o. | Košice |
| GrownApps, s.r.o. | |
| GSM Servis | Banská Bystrica |
| GSoft-Group, a.s. | |
| GSW, s.r.o. | Žilina |
| Guldan-Studio, s.r.o. | |
| Gurkuda, s.r.o. | |
| Gust | |
| Habitable | |
| HALFPIXEL, s.r.o. | |
| Hardsun Digital Hub | Košice |
| HealthCare Lab | |
| Heico, spol. s r.o. | Trnava |
| Helixsoft | Prešov |
| Heso Com, s.r.o. | Trnava |
| Hilbi Health, s.r.o. | |
| HitHorizons | |
| HMH, spol. s r.o. | |
| Hofitech Ltd | |
| Holdy Software | Bratislava |
| Host.sk | Bratislava |
| host2u.sk | Nitra |
| Hostromo Group, s.r.o. | |
| Hotovo, s.r.o. | |
| Hotwire webhosting | Žilina |
| Hour, spol. s r.o. | Žilina |
| Hriko.sk | |
| HubHub | Bratislava |
| HULMAN design studio, s.r.o. | Žilina |
| Hurican.sk | Bratislava |
| Hweld, s.r.o. | |
| HWiNFO | Bratislava |