| ORBIT Analytics | 🍎 | 1 | 5.0★ | Productivity |
| ORBIT GLOBAL TECH LTD | 🍎 | 1 | 4.5★ | Travel |
| ORBIT STUDIOS BILGI TEKNOLOJILERI ANONIM SIRKETI | 🍎 | 1 | 5.0★ | Lifestyle |
| ORBITAL POINT COMPANY FOR INFORMATION TECHNOLOGY LTD | 🍎 | 1 | 4.7★ | Navigation |
| ORBITECH PTE. LTD. | 🍎 | 1 | 4.6★ | Social Networking |
| ORCA STUDIOS PTY. LTD. | 🍎 | 1 | 4.6★ | Games |
| ORCAT PTE. LTD. | 🍎 | 1 | 4.5★ | Games |
| ORDABLE W.L.L | 🍎 | 1 | — | Shopping |
| OREGON AMATEUR BASKETBALL | 🍎 | 1 | 4.7★ | Sports |
| ORF Online | 🍎 | 1 | 4.1★ | News |
| ORFETECH OU | 🍎 | 1 | 4.8★ | Lifestyle |
| ORG DIKIDI | 🍎 | 1 | — | Lifestyle |
| ORGANIZEAT LTD | 🍎 | 1 | 4.8★ | FOOD_AND_DRINK |
| ORGO INFORMATICS S.R.L | 🍎 | 1 | 4.0★ | Productivity |
| ORIENT BASIC SCIENCE AND TECHNOLOGY PTE. LTD. | 🍎 | 1 | 4.6★ | Social Networking |
| ORIGINAL TRAVEL COMPANY LTD | 🍎 | 1 | — | Travel |
| ORIGO ENTERTAINMENT PTE. LTD. | 🍎 | 1 | 5.0★ | Graphics & Design |
| ORIGO Education | 🍎 | 1 | 5.0★ | Education |
| ORION (Apps) | 🍎 | 1 | 5.0★ | Business |
| ORION ENTERPRISES, INC | 🍎 | 1 | 3.7★ | Business |
| ORION FUTURE TECHNOLOGY LIMITED | 🍎 | 1 | 4.8★ | Games |
| ORION HAUS, LLC | 🍎 | 1 | 5.0★ | Travel |
| ORKESTRA YAZILIM BILISIM TEKNOLOJILERI PRODUKSIYON DANISMANLIK INT HIZM LTD STI | 🍎 | 1 | 4.3★ | Games |
| OROBET LIMITED | 🍎 | 1 | 3.7★ | Games |
| ORUX COMPANY S.A.S | 🍎 | 1 | 4.6★ | Health & Fitness |
| ORYONG KIM | 🍎 | 1 | 5.0★ | Sports |
| OS Technology Services LLC | 🍎 | 1 | 5.0★ | Entertainment |
| OSC Audio | 🍎 | 1 | 4.0★ | Music |
| OSC Innovation | 🍎 | 1 | 5.0★ | Lifestyle |
| OSCAR CLARK | 🍎 | 1 | 2.6★ | Entertainment |
| OSENGO | 🍎 | 1 | 4.8★ | Health & Fitness |
| OSF Healthcare System | 🍎 | 1 | — | Medical |
| OSIT Impresa SPA | 🍎 | 1 | 4.4★ | Shopping |
| OSMAN SERDAR SARITAS | 🍎 | 1 | 5.0★ | Medical |
| OSMAN USLU | 🍎 | 1 | — | Music |
| OSPREY CHARGING NETWORK LTD | 🍎 | 1 | 5.0★ | Navigation |
| OSSIX TECHNOLOGIES, LLC | 🍎 | 1 | 5.0★ | Finance |
| OSTA LABS LTD | 🍎 | 1 | 4.4★ | Games |
| OT | 🍎 | 1 | 5.0★ | Shopping |
| OTA WARD | 🍎 | 1 | 2.4★ | Health & Fitness |
| OTCF S.A. | 🍎 | 1 | 4.0★ | Shopping |
| OTDSOFT INC. | 🍎 | 1 | 4.7★ | Sports |
| OTECEL S.A. | 🍎 | 1 | 4.4★ | Productivity |
| OTERO GONZALEZ PATRICIA | 🍎 | 1 | 5.0★ | Graphics & Design |
| OTHINK Technology Co., Ltd. | 🍎 | 1 | 4.1★ | Photo & Video |
| OTOBANK Inc. | 🍎 | 1 | 4.8★ | Entertainment |
| OTP BANKA SRBIJA | 🍎 | 1 | 4.8★ | Finance |
| OTP Bank Nyrt. | 🍎 | 1 | 4.7★ | Finance |
| OTP Bank Russia | 🍎 | 1 | 4.8★ | Finance |
| OTRADA HOSPITALITY LIMITED (NG) | 🍎 | 1 | 2.9★ | Sports |