| Hervolution ApS | |
| Hesehus | Region of Southern Denmark |
| Heyhack ApS | |
| Hi3G Denmark ApS | Capital Region of Denmark |
| hiveonline ApS | |
| Hjelmslund Electronics | Capital Region of Denmark |
| Hoard | |
| Hoba Therapeutics ApS | |
| Holm & Bertram | Capital Region of Denmark |
| Hosters | Capital Region of Denmark |
| HostOnline.dk | Central Denmark Region |
| Hotel- og Restaurantskolen | |
| Hottinger Brüel & Kjær A/S | |
| Hovmark Data ApS | Region of Southern Denmark |
| HP Danmark | Capital Region of Denmark |
| Hubbl | |
| Hugin Expert A/S | North Jutland Region |
| Hundested Propeller A/S | |
| Hyme Energy ApS | |
| Hypefactors | |
| Højer & Lauritzen ApS | Central Denmark Region |
| IBA Erhvervsakademi Kolding | |
| Ibistic Technologies Denmark A/S | Capital Region of Denmark |
| IC Electronic A/S | Central Denmark Region |
| ICEpower A/S | |
| Iconfinder ApS | |
| iConomy | Region of Southern Denmark |
| iConsultancy | Capital Region of Denmark |
| ID Solutions ApS | |
| IDC Ventures | |
| IdeFA Gruppen ApS | North Jutland Region |
| Idenion ApS | Region of Southern Denmark |
| Idoc A/S | |
| IHM A/S | Capital Region of Denmark |
| IIH Nordic | Capital Region of Denmark |
| Image Metrology A/S | Capital Region of Denmark |
| Immudex | |
| Immunitrack ApS | |
| Impact | Central Denmark Region |
| ImpactSphere | |
| Implevista | |
| IMX datasystems | Capital Region of Denmark |
| Incover | Central Denmark Region |
| INCUBA | Central Denmark Region |
| Index Data | Capital Region of Denmark |
| Inetdesign | Central Denmark Region |
| Infare Solutions A/S | |
| Infinigate Danmark A/S | Capital Region of Denmark |
| Influencer Marketing Hub | |
| InfoAccess | Capital Region of Denmark |