| Company name | Reg. code |
|---|---|
| OPTCOM OÜ kustutatud | 12201933 |
| OPTICON OÜ kustutatud | 12194742 |
| OPTION OÜ | 14067781 |
| OPTION ONE OÜ | 14466104 |
| OPTION OMS OÜ kustutatud | 12147257 |
| OPTIMO CORPORATION OÜ | 17092093 |
| OPTICO HM OÜ | 10418249 |
| OPTIUM GRUPP OÜ | 10301843 |
| SV OPTICUM OÜ | 11282941 |
| 3RD OPTION OÜ | 14922246 |
| OPTIMO ROBOTICS OÜ (former name OPTIMO Products OÜ) | 16008251 |
| OPTIUM INVEST OÜ kustutatud | 10760083 |
| OPTION TWO OÜ | 16242892 |
| OPTICON EHITUS OÜ kustutatud | 12319406 |
| KITCOM OÜ | 17211528 |
| POPCOM OÜ | 11399235 |
| NETCOM OÜ | 12433359 |
| ESTCOM OÜ kustutatud | 11941131 |
| MONTCOM OÜ | 10905481 |
| DITCOM OÜ | 14196047 |
| APACOM OÜ kustutatud | 16422312 |
| MPHCOM OÜ | 10585496 |
| DOTCOM OÜ kustutatud | 12272361 |
| BITCOM OÜ | 12182360 |
| SOPOCOM OÜ kustutatud | 12519718 |
| BETCOM OÜ | 14303425 |
| SOFTCOM OÜ | 10921250 |
| GETCOM OÜ | 14263772 |
| SOTCOM OÜ | 17291088 |
| OUTCOME OÜ (former name GoalLab OÜ) | 17393728 |
| COPYCOM OÜ | 17053673 |
| AUTCOM OÜ | 16253944 |
| SATCOM OÜ | 10744635 |
| LOSTCOM OÜ | 11558610 |
| ROOTCOM OÜ | 10730277 |
| SETCOM OÜ | 10642142 |
| OPTYM OÜ | 16444221 |
| ITCOM OÜ | 11986913 |
| ETCOM OÜ | 16280601 |
| DATCOM PROJECTS OÜ | 14988831 |
| OVECOM CONSULTING OÜ | 17355581 |
| ARTCOM INVEST OÜ | 11207035 |
| MK OUTCOME OÜ | 12765430 |
| ESTCOM INVEST OÜ | 14554191 |
| DOTCOM INVEST OÜ | 14723328 |
| FUTURE NETCOM OÜ | 10991476 |
| ESTCOM-HAUS OÜ | 11477538 |
| ESTCOM GRUPP OÜ | 11288493 |
| HITCOM GROUP OÜ kustutatud | 12006947 |
| APICOM SOLUTIONS OÜ | 16182813 |