| ITECS Engineering GmbH | |
| Itegia GmbH | Bavaria |
| Itelva oHG | North Rhine-Westphalia |
| Itemis AG | North Rhine-Westphalia |
| Items GmbH | North Rhine-Westphalia |
| ITentify GmbH | |
| iterasoft GmbH | Hamburg |
| Iteratec GmbH | Bavaria |
| iTernity GmbH | Baden-Württemberg |
| Iternum GmbH | Hesse |
| iThera Medical GmbH | |
| ititpro.com | Baden-Württemberg |
| ITKservice GmbH & Co. KG | Bavaria |
| ITL GmbH | Hesse |
| ITM Isotope Technologies Munich SE | |
| ITMS Marketing GmbH | Hesse |
| ITNovation GmbH | Baden-Württemberg |
| ITO Consult GmbH | |
| ITONICS GmbH | |
| itp systems & solutions GmbH & Co. KG | Bavaria |
| itratos Ltd & Co. KG | Bavaria |
| Itsbetter | Baden-Württemberg |
| ITscope GmbH | |
| ItsMyCargo GmbH | |
| itsmydata | |
| ittc print + web | Lower Saxony |
| ITU marine systems GmbH | |
| ITWAVE - Vinokurov | Berlin |
| ITworks Systemhaus GmbH | Rhineland-Palatinate |
| ITZ-Informationstechnologie-Zentrum Rostock GmbH | Mecklenburg-Vorpommern |
| it[colos] AG | North Rhine-Westphalia |
| IU Internationale Hochschule | Thuringia |
| IU Internationale Hochschule GmbH | |
| IUK Software GmbH | Schleswig-Holstein |
| iVE.ONE | |
| iVentureGroup GmbH | Hamburg |
| IVF Software | |
| IVM EDV-Beratung GmbH | North Rhine-Westphalia |
| IVP Group Germany GmbH | Baden-Württemberg |
| Ivu Informationssysteme GmbH | Schleswig-Holstein |
| Ivy GmbH | |
| iwascoding GmbH | Berlin |
| iworx | Lower Saxony |
| Iwoxx | Bavaria |
| IX-CAD GmbH | Bavaria |
| iX-tech GmbH | |
| Ixea | Baden-Württemberg |
| iXperienz GmbH & Co. KG | Hamburg |
| iXpoint Informationssysteme GmbH | Baden-Württemberg |
| Ixsoft | Brandenburg |