| GMS Hutter GmbH & Co KG | Salzburg |
| GO.WEST Communications GmbH | Salzburg |
| Goesta Smekal IT-Consulting | Vienna |
| Goober | |
| GoStudent GmbH | |
| goUrban | |
| goUrban e-Mobility GmbH | |
| GPGTools GmbH | |
| Graf Holding GmbH | Vorarlberg |
| Graph Therapeutics | |
| GraphSense | |
| Graz Camera | Styria |
| Graz University of Technology - Institute for Computer Graphics and Vision | Styria |
| Graz University of Technology - Mathematics | Styria |
| Green Rocket GmbH | |
| Green4Cities GmbH | |
| GREENoneTEC Solarindustrie GmbH | |
| Greenpass for real estate | |
| Greenstart | |
| Greentube | Vienna |
| Greenwood-Power GmbH | |
| Greiner Bio-One International GmbH | |
| Greiner Innoventures GmbH | |
| Groiss Informatics GmbH | Carinthia |
| Grommunio | Vienna |
| Gropyus AG | |
| Grow Your Startup | |
| GRZ IT Center Linz GmbH | Upper Austria |
| GTech Automatisierungstechnik GmbH | |
| Gutmann KAG | |
| H.Stocker GmbH | |
| H82 medientechnik GmbH | Vienna |
| Hack the Crisis Austria | |
| HAKOM Solutions GmbH | Vienna |
| HALE electronic GmbH | Salzburg |
| Halli Data GmbH | Salzburg |
| Han Anlagenbau GmbH | |
| Hansmen Group | Vienna |
| Happylab GmbH | |
| HappyMed GmbH | |
| Hard- und Software GmbH Nfg KG | Carinthia |
| Hartlauer Handelsgesellschaft mbH | Upper Austria |
| Haschek Solutions | |
| Haude Electronica Verlags GmbH | Vienna |
| HD Immune | |
| Healcloud | |
| Health Hub Vienna | |
| Health Tech Hub Styria Pitch & Partners | |
| HeartBeat.bio AG | |
| Heilig & Schubert Software AG | Vienna |