| Vizualne Kreacije d.o.o. | City of Zagreb |
| Vodotehnika d.d. | |
| VONing | Osijek-Baranja |
| Wayoo | City of Zagreb |
| web IT d.o.o. | Osijek-Baranja |
| Web Marketing d.o.o. | City of Zagreb |
| Web Studio | Primorje-Gorski Kotar |
| Web Summer Camp | Primorje-Gorski Kotar |
| WebEdIT.ht | Zadar |
| Webmaster.hr | |
| Websolutions Agency | City of Zagreb |
| WeOnlyDo Software | Osijek-Baranja |
| WERXE d.o.o. | |
| Winter | City of Zagreb |
| Wippien | Osijek-Baranja |
| WiPS Systems d.o.o. | |
| Worig d.o.o. | Zagreb |
| Workspace | |
| WSP | |
| Wüstenrot stambene štedionice d.d. | |
| X-Logic | |
| X-Media d.o.o. | Varaždin |
| Z-EL d.o.o. | City of Zagreb |
| Zadarweb Studio | City of Zagreb |
| Zagreb Data d.o.o. | City of Zagreb |
| Zagrebačka škola ekonomije i managementa | |
| Zagrel Rittmeyer d.o.o. | Zagreb |
| Zagria d.o.o. | City of Zagreb |
| Zanor.com | Istria |
| Zdravstveno veleučilište Zagreb | |
| Zel-Cos | City of Zagreb |
| Zeleni Zmaj d.o.o. | |
| Zenadian d.o.o. | |
| Zeraxo | City of Zagreb |
| Zero Molecule | City of Zagreb |
| Zoki Online | Split-Dalmatia |
| Zola d.o.o. | City of Zagreb |
| Zorland j.d.o.o. | City of Zagreb |
| Zviz Design Studio | City of Zagreb |