| Oskando OÜ | Harju County |
| Overall Eesti AS | Harju County |
| OX.ee | Harju County |
| Ozi Media OÜ | Harju County |
| Panasonic Eesti | Harju County |
| PayTraq | |
| PC Expert | Tartu County |
| PHP.ee | Harju County |
| Piksel AS | Harju County |
| Planet.ee | Harju County |
| Printerikskus | Harju County |
| Proekspert | Harju County |
| ProMedia | Tartu County |
| Qomo HiteVision | Harju County |
| Radionet OÜ | Harju County |
| Rantelon OÜ | Harju County |
| Rapo | Harju County |
| Real Systems Ltd | Harju County |
| Renerki Kaubanduse OÜ | Harju County |
| Resta AS | Harju County |
| Riigi Infosüsteemi Amet | Harju County |
| Riigi Infosüsteemide Arenduskeskus | Harju County |
| ROBOTEX | Harju County |
| Roltech OÜ | Harju County |
| Sale24.ee | Harju County |
| San Revilo AS | Harju County |
| Saurus | Harju County |
| Saurused Ltd | Harju County |
| ScaleWireless | Harju County |
| Security MS OÜ | Harju County |
| Security Software OÜ | Harju County |
| ServiceNet EE OÜ | Harju County |
| Sevenline OÜ | Harju County |
| Shop.IT | Harju County |
| Sign Computers | Harju County |
| Simson OÜ | Harju County |
| Sindi Telekom | Harju County |
| Skriining AS | Harju County |
| SmartCap AS | Harju County |
| SmartISoft | Harju County |
| Smartlink | Harju County |
| Softmedia | Harju County |
| Softronic Baltic AS | Harju County |
| ST Software vBulletin Styles | Harju County |
| Starline Web Services | Harju County |
| Starman | Harju County |
| Startup Estonia | Harju County |
| Startup Wise Guys | Harju County |
| Striimer OÜ | Harju County |
| STV AS | Harju County |