| Dewave GmbH | |
| Dexion Services AG | Basel-Stadt |
| DIAdata | Zug |
| Diagnosdata AG | Zug |
| Diamond S.A. | |
| Diem Association | |
| Diggelmann EDV-Zubehör AG | Zurich |
| Digicomp Academy S.A. | Geneva |
| Digital Festival | |
| digitalswitzerland | Bern |
| Digitourism | |
| Digitronic AG | Basel-Landschaft |
| Diglin GmbH | Zurich |
| Dimpora | |
| DiNABIOS AG | |
| DINAMIQS | |
| DiNAQOR | |
| Diramics AG | |
| DIS GmbH | Zurich |
| Diso AG | |
| Distalmotion S.A. | |
| Distrelec - Bereich der Dätwyler Schweiz AG | Zurich |
| Diverto ICT-Services | Bern |
| Diwega GmbH | Zurich |
| Dizmo AG | |
| django CMS Association | |
| DKSH Holding Ltd | |
| DM Electronics AG | Bern |
| Docugate | Lucerne |
| Dogrel elektronik AG | St. Gallen |
| Doktormac | Bern |
| Domain Forward | |
| DomainsNow4U.com | Geneva |
| domo.health | |
| Doodle | |
| Dormakaba Group | Zurich |
| dotBase Solutions Informatiques S.A. | Geneva |
| Dotphoton AG | |
| Dragonlabz Swiss AG | |
| Dreamlab Technologies AG | Bern |
| Drone Harmony AG | |
| DropNet AG | Basel-Landschaft |
| DSMI Electronics S.A. | Valais |
| DSS Sustainable Solutions Switzerland S.A. | |
| DSS Swiss Software | St. Gallen |
| Dualsystems Biotech AG | |
| Dubidot GmbH | St. Gallen |
| Dubois-Informatique S.A. | Neuchâtel |
| Ducret Software | Zurich |
| Dufour Aerospace | |