| Implaneum GmbH | Baden-Württemberg |
| Implen GmbH | |
| Implico GmbH | Hamburg |
| Implify GmbH | |
| Implisense GmbH | |
| impltech GmbH | |
| Impossible Software | Hamburg |
| Impossible Software GmbH | Hamburg |
| Impressum der interactive tools GmbH | Berlin |
| ImprovIT Software Innovations GmbH | Schleswig-Holstein |
| Impuls 1 GmbH | |
| ImPuls AG | North Rhine-Westphalia |
| Impuls Imaging GmbH | Bavaria |
| Impuls Software Systeme GmbH | Baden-Württemberg |
| Impulsus GmbH | Baden-Württemberg |
| IMR electronic GmbH | North Rhine-Westphalia |
| IMS Connector Systems GmbH | Baden-Württemberg |
| IMS Robotics GmbH | |
| Imsolution GmbH | |
| IMST GmbH | |
| IMT-Systems GmbH | |
| Imtron GmbH | North Rhine-Westphalia |
| IMU Institut GmbH | |
| Imwebsein GmbH | Brandenburg |
| IN Media KG | Bavaria |
| In Mediakg TI | Bavaria |
| IN-Berlin im Web - Individual Network Berlin e.V. | Berlin |
| in-screen.design | Bavaria |
| in-tech GmbH | |
| In. Fact. GmbH | |
| in.vent Diagnostica GmbH | |
| IN2 Digital Innovations GmbH | |
| InboundLabs GmbH | |
| INBUREX Consulting GmbH | North Rhine-Westphalia |
| INCA Industrie- und Bürotechnik GmbH | Saxony |
| Incari GmbH | |
| INCAS Training und Projekte GmbH & Co. KG | North Rhine-Westphalia |
| IncBase GmbH | Schleswig-Holstein |
| Incca GmbH | Bavaria |
| Incenso Gesellschaft mbH i.L. | North Rhine-Westphalia |
| Inch-media GmbH | North Rhine-Westphalia |
| INCLUDIS Automation Systems, Inc. | Berlin |
| incognito GmbH & Co. KG | North Rhine-Westphalia |
| InCom GmbH | Saarland |
| INCONET Media GmbH | Baden-Württemberg |
| Inconso AG | Hesse |
| Incontext.technology GmbH | |
| Incony AG | North Rhine-Westphalia |
| INCORS GmbH | Brandenburg |
| Incowia GmbH | Thuringia |