| Rate Solutions LLC | |
| RateChain Solutions OÜ | |
| Ready Player Me | |
| RebelRoam OÜ | |
| Recoshelf | |
| Refire Design | |
| Reimo Roosileht FIE | Harju |
| Reinvest24 OÜ | |
| Remato | |
| ReMoneta | |
| Rendin OÜ | |
| Renerki Kaubanduse OÜ | Harju |
| Renua.one | |
| Republic of Estonia - Consumer Protection and Technical Regulatory Authority | |
| Requestum OÜ | |
| Research in Estonia | |
| Resta | Harju |
| Reverse Resources | |
| Revuto OÜ | |
| Rezet OÜ | |
| Riigi Infosüsteemi Amet | Harju |
| Rikai Games | |
| RK Media | Harju |
| Robot Meedia | |
| Robotex | Harju |
| Robotex International | |
| Rocket10 | |
| Roheline Internet OÜ | |
| Roksnet Solutions OÜ | |
| Rolech OÜ | Harju |
| Ronas IT | |
| Roofit.Solar Energy OÜ | Harju |
| Royal Web Service OÜ | |
| RPC Fast | |
| RSH | |
| RubyGaraga | |
| Salto X OÜ | |
| SaluzyX OÜ | |
| Salv Technologies OÜ | |
| San Revilo AS | Harju |
| SAST | |
| SATVA.dev | |
| Scalater Dev OÜ | |
| Scaledrone | |
| Scalewireless | Harju |
| Scrapesuite | |
| Scrubby | |
| Security MS OÜ | Harju |
| Sellme.ee | |
| Semper Team | |