| Hügler GmbH | Baden-Württemberg |
| Hum Systems GmbH | |
| Human Connection gGmbH | |
| HUMAN Gesellschaft für Biochemica und Diagnostica mbH | |
| Human Solutions GmbH | Rhineland-Palatinate |
| humanIT Software GmbH | North Rhine-Westphalia |
| Humanitec GmbH | |
| HumanOptics AG | Bavaria |
| Humboldt-Universität zu Berlin | Berlin |
| Humboldt-Universität zu Berlin - Institut für Informatik | Berlin |
| Humboldt-Universität zu Berlin - Institut für Mathematik | Berlin |
| Humer IT | North Rhine-Westphalia |
| HumHub GmbH & Co. KG | |
| HUMMEL AG | Baden-Württemberg |
| Hummingbird Diagnostics GmbH | |
| Hundt Consulting GmbH | |
| Hüngsberg GmbH | Bavaria |
| Hunolds-ID | North Rhine-Westphalia |
| HUP AG | Lower Saxony |
| Husemann & Fritz EDV-Organisations- und Beratungs GmbH | North Rhine-Westphalia |
| Hutte GmbH | |
| HV Capital | Berlin |
| HV Digital GmbH | Bavaria |
| HW Sensor Messtechnik | North Rhine-Westphalia |
| HWI IT GmbH | |
| HWM-IT Berlin | Berlin |
| HWS Informationssysteme GmbH | Bavaria |
| Hybrid AdTech GmbH | |
| Hybrid Heroes GmbH | |
| HYBRIMIN Computer + Programme GmbH & Co. KG | Lower Saxony |
| Hydrogenious LOHC Technologies GmbH | Bavaria |
| Hygraph | |
| Hypatos GmbH | |
| Hypcloud GmbH | |
| Hype | |
| HYPE Softwaretechnik GmbH | North Rhine-Westphalia |
| Hyperbrand | |
| HyperCube IT Solutions | |
| Hyperdata | |
| hyperdigital UG (haftungsbeshränkt) | Bavaria |
| Hyperschall Technologie Göttingen GmbH | |
| Hypersoft GmbH | Hamburg |
| Hypersoft Informationssysteme GmbH | |
| Hyperstone AG | Baden-Württemberg |
| Hypoport SE | |
| hypress.net | Baden-Württemberg |
| hyrd GmbH | |
| Hytera Mobilfunk GmbH | Lower Saxony |
| hz Soft- und Hardware GmbH | Baden-Württemberg |
| I B + M A de Lande Long | Hesse |