| .HR Domain | Split-Dalmatia |
| 03GO d.o.o. | City of Zagreb |
| 05vizija.net | Istria |
| 2Front | City of Zagreb |
| 32bita d.o.o. | City of Zagreb |
| 3MI Lab Ltd | |
| 3t.cable d.o.o. | Primorje-Gorski Kotar |
| 3topia | |
| 4APP | |
| 4PIXEL | |
| 4th Dimension d.o.o. | City of Zagreb |
| 800 Ventures Ltd | Zagreb |
| A.G. media d.o.o. | City of Zagreb |
| A/D Electronic d.o.o. | |
| A1 Hrvatska | |
| Abacus j.d.o.o. | Međimurje |
| ABM Grafika d.o.o. | |
| Acris d.o.o. | City of Zagreb |
| Ad-Info | City of Zagreb |
| Add Design Studio | Istria |
| Adeptus d.o.o. | City of Zagreb |
| Adorea d.o.o. | |
| Adria Scan | City of Zagreb |
| Adriakod d.o.o. | Primorje-Gorski Kotar |
| Adricom | |
| Advanced Technology Days | Zagreb |
| Advisera Expert Solutions Ltd | |
| Aequitas d.o.o. | |
| AG04 Innovative Solutions d.o.o. | City of Zagreb |
| Aheront d.o.o. | City of Zagreb |
| AI2Future | Zagreb |
| AirVantage d.o.o. | Sisak-Moslavina |
| Alara uređaji d.o.o. | |
| ALBA marketing | Vukovar-Srijem |
| Alert d.o.o. | |
| Alfatec | |
| Alfatec Group d.o.o. | City of Zagreb |
| Alma Electronic d.o.o. | City of Zagreb |
| Almahor Studio | Varaždin |
| Alo Alo d.o.o. | Split-Dalmatia |
| ALPHA-M računala | Varaždin |
| ALT digital d.o.o. | |
| Alt Web Design | City of Zagreb |
| Američka gospodarska | |
| Amphinicy d.o.o. | City of Zagreb |
| Amphinicy Technologies | |
| Ampnet | |
| Analogbit d.o.o. | |
| AnAs d.o.o. | |
| Apcom d.o.o. | |