| Qodenut OÜOÜPrivate limited company | 17348242 | TallinnHarju maakond | 13.10.20250 yrs |
| QortX OÜOÜPrivate limited company | 16019846 | TallinnHarju maakond | 30.07.20206 yrs |
| Quad Phase OÜOÜPrivate limited company | 17129867 | Lääne-Harju valdHarju maakond | 09.12.20241 yrs |
| QUAII OÜOÜPrivate limited company | 17194089 | TallinnHarju maakond | 11.03.20251 yrs |
| QualBridge OÜOÜPrivate limited company | 17115807 | TallinnHarju maakond | 18.11.20241 yrs |
| QUALITY ON BIT INTERNATIONAL CONSULTING OÜOÜPrivate limited company | 16946630 | TallinnHarju maakond | 19.03.20242 yrs |
| Quantara OÜOÜPrivate limited company | 17245272 | TallinnHarju maakond | 21.05.20251 yrs |
| Quantfall OÜOÜPrivate limited company | 16322705 | TallinnHarju maakond | 22.09.20214 yrs |
| Quantitative Easing OÜOÜPrivate limited company | 14529678 | TallinnHarju maakond | 20.07.20188 yrs |
| Quantopus Consulting OÜOÜPrivate limited company | 17393423 | TallinnHarju maakond | 12.12.20250 yrs |
| Quantum Soup OÜOÜPrivate limited company | 16008788 | TallinnHarju maakond | 14.07.20206 yrs |
| QuantumTech Services OÜOÜPrivate limited company | 17207455 | TallinnHarju maakond | 28.03.20251 yrs |
| Qubcore Technologies OÜOÜPrivate limited company | 17416265 | TallinnHarju maakond | 19.01.20260 yrs |
| Quema OÜOÜPrivate limited company | 16398631 | TallinnHarju maakond | 23.12.20214 yrs |
| QUESTMENT OÜOÜPrivate limited company | 16198122 | TallinnHarju maakond | 05.04.20215 yrs |
| QuickNTech.com OÜOÜPrivate limited company | 16926946 | TallinnHarju maakond | 22.02.20242 yrs |
| Quorvix OÜOÜPrivate limited company | 17206846 | TallinnHarju maakond | 27.03.20251 yrs |
| Ququdev OÜOÜPrivate limited company | 16011112 | TallinnHarju maakond | 16.07.20206 yrs |
| QVQNETWORK OÜOÜPrivate limited company | 16726911 | TallinnHarju maakond | 27.04.20233 yrs |
| Qwyddy Technologies OÜOÜPrivate limited company | 14186132 | TallinnHarju maakond | 16.01.20179 yrs |
| Rabasamblik OÜOÜPrivate limited company | 14838281 | TallinnHarju maakond | 31.10.20196 yrs |
| Ragnarök Group OÜOÜPrivate limited company | 16347935 | TallinnHarju maakond | 21.10.20214 yrs |
| Rahal Services OÜOÜPrivate limited company | 16647229 | TallinnHarju maakond | 06.01.20233 yrs |
| Rainbow Technology OÜOÜPrivate limited company | 11418292 | TallinnHarju maakond | 30.08.200718 yrs |
| Raindrop OÜOÜPrivate limited company | 16890438 | TallinnHarju maakond | 04.01.20242 yrs |
| RAISUM OÜOÜPrivate limited company | 17031677 | TallinnHarju maakond | 18.07.20242 yrs |
| RaizerLabs OÜOÜPrivate limited company | 17363712 | Viimsi valdHarju maakond | 03.11.20250 yrs |
| RalphNex OÜOÜPrivate limited company | 16932562 | TallinnHarju maakond | 01.03.20242 yrs |
| Ramka OÜOÜPrivate limited company | 16717295 | TallinnHarju maakond | 14.04.20233 yrs |
| Rändrahn OÜOÜPrivate limited company | 16964728 | TallinnHarju maakond | 11.04.20242 yrs |