| RUR | Belgrade |
| S8 Studio | Belgrade |
| Saga d.o.o. | Belgrade |
| SBB | Belgrade |
| SBB d.o.o. | Belgrade |
| SEE ICT | Belgrade |
| Semaphore Technologies d.o.o. | South Bačka |
| SEO Blog optimizacija sajta | Belgrade |
| SEO Optimizacija | Belgrade |
| Serbia Start Up | Belgrade |
| Serbian Academy of Sciences and Arts - Mathematical Institute | Belgrade |
| Serbian Games Association | Belgrade |
| Serbian Private Equity Association | Belgrade |
| Serbian.tech | Moravica |
| Servis mobilnih telefona Doktor Mobil | Belgrade |
| Servis Monitor Nis | Nišava |
| Servis Računara Reality | Belgrade |
| Seven Serbian Venture Network | Belgrade |
| Signal Komunikacije | Belgrade |
| Singi | Belgrade |
| SITO | Belgrade |
| Sixpack dizajn studio | Belgrade |
| SkyHosting | Belgrade |
| SMART | South Bačka |
| Smart Technologies LLC d.o.o. | |
| SmartCat | South Bačka |
| SmartNet | Nišava |
| SMDesign | Nišava |
| SmileSoft S.A. | Pomoravlje |
| Softek | Zlatibor |
| SoftKom | Belgrade |
| SoftSerbia IT Outsourcing | Belgrade |
| Solfins d.o.o. | Belgrade |
| Sportifico | Belgrade |
| StanCo IST | South Bačka |
| Startit | Belgrade |
| Studio Maximov | South Bačka |
| Studio Present | Belgrade |
| StuntCodes d.o.o. | Belgrade |
| SuperAdmins | Belgrade |
| Superverse Industries | Belgrade |
| Sve za laptop | Belgrade |
| Svet Kompjutera | Belgrade |
| Swebdizajn Web Dizajn | Belgrade |
| Symbol International d.o.o. | Belgrade |
| Tehnomanija d.o.o. | Belgrade |
| Tehnomarket internet prodavnica | Belgrade |
| Telekom Srbija | Belgrade |
| Telenor d.o.o. | Belgrade |
| TelNet Technologies | Belgrade |