| Gazduire.ro | Bucharest |
| GDS Consult S.R.L. | |
| GECAD Group | Bucharest |
| GeFors Techno Computers S.R.L. | Prahova |
| Gekko Fox | |
| Gemini cad systems | Iași |
| General Equipment Automation | |
| Genuineq | |
| Geonet Soft | Timiș |
| GeoStru Software | |
| German Electronics | |
| Gesp IT | |
| GeTech Automation | |
| Ghesi.com | Alba |
| Giros | Iași |
| Global E Business Solution Group | Cluj |
| Global Legal Hackathon | |
| Global Systems Communications | Bucharest |
| Global Technical Group | |
| Global Technology Services | |
| Globinary | |
| GlocalSoft S.R.L. | |
| GMB Computers | Constanța |
| GNEX | |
| Go4it | Bucharest |
| Gomag | Maramureș |
| Goodlegal | |
| Goodroid RPA S.R.L. | |
| GoTech World | |
| Graitec Romania | Bucharest |
| Grapefruit | |
| GraphicBull | |
| Graphwire | Brașov |
| Green Horse Games | Bucharest |
| Green Pixel | Bucharest |
| GreenSoft | |
| GreenSoft S.R.L. | Bucharest |
| Greppy Systems | Cluj |
| GSR Grup S.R.L. | Cluj |
| GTS Telecom | Bucharest |
| GUV Electronics | Bucharest |
| H-X Technologies | |
| Hackout | |
| HackTM | |
| Halcyon Mobile | |
| Hamor Soft | Covasna |
| Hangar Hosting | Timiș |
| Happy Advertising | |
| Happy Pencil | |
| Happy Pixels | |