| HoT - House of Tools GmbH | Bremen |
| HOT Electronic GmbH | Bavaria |
| Hotbytes GmbH & Co. KG | |
| HotelNetSolutions GmbH | |
| HotGloo GbR | Hamburg |
| Hotline Computer Systeme | Lower Saxony |
| Hotoprint GmbH & Co. KG | Lower Saxony |
| Hotsplots GmbH | Berlin |
| Hottgenroth GmbH | North Rhine-Westphalia |
| Hottgenroth Software AG | North Rhine-Westphalia |
| House of Change GmbH | |
| hovi.biz Webdesign | Brandenburg |
| HP Deutschland GmbH | Baden-Württemberg |
| hp.weber GmbH & Co. POS-cash KG | Saxony |
| hPage | Bavaria |
| HPH-Software GmbH | North Rhine-Westphalia |
| Hprobe GmbH | |
| HQ GmbH | Thuringia |
| HQS Quantum Simulations GmbH | |
| HR Data-Orga GmbH | |
| HR Diagnostics AG | Baden-Württemberg |
| HR Solutions GmbH | Baden-Württemberg |
| HR-Com GmbH | Bavaria |
| hr-manager.de | Bavaria |
| HRADIL Spezialkabel GmbH | Baden-Württemberg |
| Hrmony GmbH | |
| HRS GmbH | |
| Hrworks GmbH | Baden-Württemberg |
| HS Bund | |
| HS Varial GmbH | Baden-Württemberg |
| HS/3 Hotelsoftware GmbH & Co. KG | North Rhine-Westphalia |
| hsag Heidelberger Services AG | |
| HSBC Continental Europe S.A., Germany | |
| HSC GmbH | Hamburg |
| HSC Solutions | |
| HSE Computersysteme H.Schulte GmbH | North Rhine-Westphalia |
| hse-electronics GmbH | Schleswig-Holstein |
| HSH Soft- und Hardware Vertriebs GmbH | Brandenburg |
| HSi GmbH | Thuringia |
| hsp Handels-Software-Partner GmbH | Schleswig-Holstein |
| HST High Soft Tech GmbH | Baden-Württemberg |
| HTML-Seminar | Baden-Württemberg |
| HTML5 Bones | North Rhine-Westphalia |
| htp GmbH | Lower Saxony |
| HTT High Tech Trade GmbH | Bavaria |
| http.net Internet GmbH | North Rhine-Westphalia |
| hubblr GmbH | |
| Hubertus Adel und René Adel GbR | Saxony |
| Hübner+Berger | Bavaria |
| Hubraum | Berlin |