| Handelsagentur Silhan GmbH | Baden-Württemberg |
| Handicraft Handwerker-Software | Baden-Württemberg |
| Handke Industrie Software GmbH | Lower Saxony |
| Händle & Korte GmbH | North Rhine-Westphalia |
| handle IT oHG | |
| HandlingTech Automations-Systeme GmbH | |
| Handly GmbH | Berlin |
| handschigl Media | Bavaria |
| Handy Rhein Sieg | North Rhine-Westphalia |
| Handy Tech Elektronik GmbH | Baden-Württemberg |
| Handy.de Telekommunikation GmbH | North Rhine-Westphalia |
| HandyGames GmbH | Bavaria |
| Handytreff GmbH | North Rhine-Westphalia |
| Hänelt GmbH | Bavaria |
| haneWIN Software | Baden-Württemberg |
| Hanko.io | |
| Hans Albu Sanmiguel GmbH | |
| Hans berger GmbH | North Rhine-Westphalia |
| HANS BODE Innovative Büroelektronik GmbH | Hesse |
| Hans Englert oHG | Berlin |
| Hans Jungblut GmbH & Co. KG | North Rhine-Westphalia |
| Hans-Böckler-Stiftung | |
| Hans-P. Stein Software GmbH | |
| Hansa Computer GmbH | Saxony |
| Hansalog GmbH & Co. KG | Lower Saxony |
| Hanse Ventures BSJ GmbH | Hamburg |
| Hanse-Wissenschaftskolleg | |
| Hanseaticsoft GmbH | |
| HanseGIS Gesellschaft für Geoinformationssysteme und Geotechnik mbH | Hamburg |
| Hansen World | Berlin |
| Hanseseiten | Schleswig-Holstein |
| Hanwha Q CELLS GmbH | |
| Hanwha Qcells GmbH | |
| Happyhotel | |
| happylemon UG (haftungsbeschränkt) | |
| HAPTIK GmbH | |
| Harald Henn - Marketing Resultant GmbH | Rhineland-Palatinate |
| Harald Schneider Software- & Mediadesign | Saarland |
| Harbor Technology Group GmbH | Bavaria |
| Hard- & Software A.Baecker | Bavaria |
| Harders IT UG (haftungsbeschränkt) | Schleswig-Holstein |
| HARDWARE.co | Berlin |
| Hardwarejournal.de | |
| HardwareSchmiede | Rhineland-Palatinate |
| Harman Becker Automotive Systems GmbH | Baden-Württemberg |
| Harmony | Rhineland-Palatinate |
| Harpocrates Solutions GmbH | |
| Hartmann Elektronik GmbH | Baden-Württemberg |
| Hartmann Software | Berlin |
| Hartnagel Software | Baden-Württemberg |