| Das Agenturhaus Werbe und Marketing GmbH | Bavaria |
| Das ASS | Hesse |
| Das Lab GmbH | |
| DAS STUDIO Torsten Hegner GmbH | |
| Dasat UG | Bavaria |
| DASCOM Europe GmbH | Baden-Württemberg |
| Daseco GmbH | North Rhine-Westphalia |
| Dastani Consulting GmbH | Hesse |
| dasWeb.haus | Bavaria |
| Daswirdwas Design | Hesse |
| DATA 2000 GmbH | |
| Data Design System GmbH | North Rhine-Westphalia |
| Data Dienste | North Rhine-Westphalia |
| Data Display GmbH | Bavaria |
| Data Elektronik GmbH | |
| Data Insights GmbH | |
| Data Mart Consulting | |
| Data MATRIX Ltd | |
| Data Natives | |
| Data One GmbH | Saarland |
| Data Revenue GmbH | |
| Data Science Retreat | |
| data-inside GmbH | North Rhine-Westphalia |
| DATA-NG Consulting & Projects GmbH | |
| DATA-PLAN Computer Consulting GmbH | |
| data42 GmbH | |
| Dataasservices | |
| DATAbility GmbH | |
| Datablue GmbH | |
| Databoxes | Hamburg |
| Databyte GmbH | |
| DATAC Aktiengesellschaft | |
| DataCAD Software & Service GmbH | Rhineland-Palatinate |
| Datacake GmbH | |
| datacapo IT sports services GmbH | |
| Datacenter One GmbH | |
| DataCenter-Insider | |
| DataCite | |
| Dataconsult Joachim Groth e.K. | Brandenburg |
| Datadrivers GmbH | |
| DataGis GmbH | Baden-Württemberg |
| dataglobal GmbH | |
| datagraphis GmbH | |
| Datagroup | Baden-Württemberg |
| DataGuard | Bavaria |
| Datahaus Publishing GmbH | |
| DataKustik GmbH | Bavaria |
| DATALINE GmbH & Co. KG | |
| DataLion GmbH | |
| DATAlovers AG | |