| Darwin Digital | |
| Dasysto AG | Zurich |
| Data Concept | Vaud |
| Data Quest AG | Zurich |
| Data Unit AG | Lucerne |
| Data-Comm | Vaud |
| Data-Mail-2000 S.A. | Valais |
| Databaar | Zug |
| databaum GmbH | |
| DataCore GmbH | Zurich |
| DataHow AG | |
| Datamars S.A. | Ticino |
| Datascale GmbH | |
| DataSmart AG | Solothurn |
| DataStore AG | Aargau |
| Datatrans AG | Zurich |
| Datawire AG | Zug |
| Datenretter-Schweiz GmbH | Zurich |
| Datentechnik Spengler & Reutimann | Zurich |
| Datum | |
| Dätwyler Holding, Inc. | Uri |
| Daura Ltd | |
| DAV | Zug |
| DayOne | |
| DBI Services S.A. | Jura |
| DC Graphic & Art Studio | Ticino |
| DDS Netcom AG | Zurich |
| Debiopharm | |
| Decent | Geneva |
| Decentriq | |
| dEEGtal Insights S.A. | |
| Deep Breath Intelligence AG | |
| DeepSquare Association | Zug |
| DeepTech Ventures AG | |
| Delirius | Aargau |
| Dellarocreative S.A. | Vaud |
| Deltra Software GmbH | Solothurn |
| Deluxe IT International AG | Zurich |
| DEMANDIT | Appenzell Ausserrhoden |
| Deon Digital | |
| dépannage informatique genève | Geneva |
| Derizone AG | |
| Design Techno | |
| deskbird | |
| Dettling Trade AG | Zug |
| Develco Pharma Schweiz AG | |
| DevICe Trading Company GmbH | Schwyz |
| Devigus Engineering AG | Zug |
| DevProd | Neuchâtel |
| Devs Group | |