| RIFIN d.o.o. | City of Zagreb |
| Rimac Automobili | |
| RIP d.o.o. | |
| RIS d.o.o. | Primorje-Gorski Kotar |
| RISE2 | |
| Risely Digital | |
| RIZ-Transmiters Co. | City of Zagreb |
| Robocash d.o.o. | |
| Robotiq.ai | |
| Root Tech Agency | |
| Ružičasta breskvica d.o.o. | |
| S.H.O.P. Centar d.o.o. | City of Zagreb |
| Sage Global Services Ltd | Zagreb |
| Sagena informatički inženjering | City of Zagreb |
| Samson informatika | |
| Samurai Digital | |
| Sancta Domenica d.o.o. | City of Zagreb |
| SandPlus d.o.o. | |
| Sat Shop | City of Zagreb |
| Scalable Global Solutions | |
| Scan d.o.o. | City of Zagreb |
| SD Informatika | |
| Seaway d.o.o. | |
| Secus d.o.o. | City of Zagreb |
| SedamIT | City of Zagreb |
| SeekandHit Internet marketing | Split-Dalmatia |
| Senso IS | City of Zagreb |
| Sentinel Marine solutions | |
| SEO | City of Zagreb |
| Serengeti Ltd | Zagreb |
| Serverlab | City of Zagreb |
| SEUS | |
| Shape | |
| Shard Labs | |
| Shimoda | Varaždin |
| Shipshape d.o.o. | |
| ShixxNOTE | Primorje-Gorski Kotar |
| SICK Mobilisis d.o.o. | |
| SIGIT Agency | |
| Sigwin d.o.o. | |
| Silicon Master d.o.o. | |
| Silnica d.o.o. | City of Zagreb |
| Silver technologies d.o.o. | |
| Silvestar Bistrović | Osijek-Baranja |
| Simic Company d.o.o. | |
| Simple Code | |
| Simunovic d.o.o. | Primorje-Gorski Kotar |
| Sintesys | Dubrovnik-Neretva |
| Sirius d.o.o. | Osijek-Baranja |
| SITE STUDIO web produkcija | Dubrovnik-Neretva |