| IT matcher ApS | Capital Region of Denmark |
| IT Optima A/S | Central Denmark Region |
| IT Pilot ApS | Central Denmark Region |
| IT Relation A/S | Central Denmark Region |
| it's IT A/S | |
| IT-Effect | Central Denmark Region |
| IT-Universitetet i København | Capital Region of Denmark |
| IT-Webservice.dk | Central Denmark Region |
| IT-WIT | Capital Region of Denmark |
| Itadel A/S | Central Denmark Region |
| ITAVIS ApS | Capital Region of Denmark |
| Itfirmaet.dk ApS | North Jutland Region |
| ITKonsulentRingen | Capital Region of Denmark |
| ITL Webbureau A/S | Central Denmark Region |
| Itplaneten A/S | Region of Southern Denmark |
| ITRdata A/S | |
| ITU Startup | |
| iVISION ApS | Central Denmark Region |
| IWA Consulting | |
| JAI A/S | Capital Region of Denmark |
| Jamii.one A/S | |
| Januar ApS | |
| Jaskov Consult ApS | |
| Jatana ApS | Capital Region of Denmark |
| jbox.dk | Central Denmark Region |
| Jenkov ApS | Capital Region of Denmark |
| JH Software | North Jutland Region |
| JITS ApS | |
| JJFC Online ApS | Capital Region of Denmark |
| JMV-Elteknik ApS | Region Zealand |
| JN Data A/S | Central Denmark Region |
| Jobindex A/S | |
| Jobindex Media | Capital Region of Denmark |
| JOtech A/S | Region Zealand |
| jsp-hotel.dk | Capital Region of Denmark |
| Judex A/S | North Jutland Region |
| JumpStory | |
| JustSMS | Region Zealand |
| Jyske Bank A/S | Central Denmark Region |
| Jyskweb | Region of Southern Denmark |
| Jørgen Bork Electronic ApS | Capital Region of Denmark |
| Kanda ApS | |
| Kanpla | |
| Kariya Pharmaceuticals ApS | |
| Karman Connect A/S | |
| Kaunt | |
| Keepit | |
| KeepItSimple ApS | |
| Key2Net | Region Zealand |
| Kimbrer Computer ApS | North Jutland Region |