| S.C. Verticas S.R.L. | Arad |
| S.C. Virtual Reality S.R.L. | |
| S.C. Visual Fan S.A. | |
| S.C. WalletBuzz S.R.L. | Bucharest |
| S.C. Webeff Intl S.R.L. | Arad |
| S.C. Wiz Soft S.R.L. | Brașov |
| S.I.E.B. Software | Bucharest |
| Safetech Innovations S.A. | |
| Salt & Pepper | |
| San Software S.R.L. | Bucharest |
| Sannet | Suceava |
| Satura Computers S.R.L. | Arad |
| SBP | Bucharest |
| Scanrom Copiers S.R.L. | Bucharest |
| Școala informală de IT | |
| Scop Computers | Bucharest |
| Scribsoftware S.R.L. | |
| Scriptics Decisions S.R.L. | Sibiu |
| SDG Webs | Bihor |
| Search Engine Optimization Europe Agency | Bucharest |
| SecurifAI | |
| Sedona Alm S.R.L. | Bucharest |
| SeedBlink Crowd S.A. | |
| Sekpsis Consult S.R.L. | Bucharest |
| SendTo eXpert S.R.L. | Galați |
| Senior Software | Bucharest |
| SeniorERP | Bucharest |
| Sense Vision Consulting | |
| SEO Factory | |
| SEO Marketing Agency | |
| SEO Monitor | Bucharest |
| SEO365.ro | |
| SEOClub | |
| SeoCluj.ro | |
| SEOmonitor | Bucharest |
| Seopikweb.ro | Bucharest |
| Serra Software International | |
| Servel S.R.L. | Bucharest |
| Server Admin | Bucharest |
| serveresecond-hand.ro | Bucharest |
| Service Laptop Express | Bucharest |
| Servicii SEO Bucuresti | |
| Serviciul de Telecomunicații Speciale | |
| Sether | Bucharest |
| Share IT Smart | |
| Shop4PC | Bucharest |
| ShopGSM | Bucharest |
| Sian Image Media | Constanța |
| Siel Invest S.R.L. | Bucharest |
| Sigad | |