| Odin Solutions Lda | 🍎 | 1 | — | Productivity |
| Odio Media | 🍎 | 1 | 4.5★ | Music |
| Odio Tech Pty Ltd | 🍎 | 1 | 4.5★ | Medical |
| Odiopay | 🍎 | 1 | — | Lifestyle |
| Odisha Computer Application Center | 🍎 | 1 | 4.0★ | Finance |
| Odroe Inc. | 🍎 | 1 | 5.0★ | Utilities |
| Odyl LLC | 🍎 | 1 | — | Book |
| Odysseas Gabrielides | 🍎 | 1 | — | GAMES_TRIVIA |
| Odyssee Mobile NV | 🍎 | 1 | 4.3★ | Business |
| Oebele Beetstra | 🍎 | 1 | 3.0★ | Lifestyle |
| Oeni | 🍎 | 1 | 4.7★ | FOOD_AND_DRINK |
| Oeskn Group LLC | 🍎 | 1 | 5.0★ | Health & Fitness |
| Oesterreichischer Rundfunk | 🍎 | 1 | 4.8★ | Music |
| Oevo | 🍎 | 1 | 4.1★ | Social Networking |
| OfferUp Inc. | 🍎 | 1 | 4.8★ | Shopping |
| Offeree | 🍎 | 1 | 5.0★ | Shopping |
| Offerista Group Austria GmbH | 🍎 | 1 | 4.6★ | Shopping |
| Office Depot | 🍎 | 1 | 4.8★ | Shopping |
| Office Improvers B.V. | 🍎 | 1 | — | Productivity |
| Office du Tourisme de Chamrousse | 🍎 | 1 | 5.0★ | Sports |
| Office of the Commissioner of Electronic Communications and Postal Regulation (OCECPR)) | 🍎 | 1 | — | Utilities |
| Officemanager | 🍎 | 1 | — | Business |
| Officetree | 🍎 | 1 | 5.0★ | Business |
| Officeworks Ltd | 🍎 | 1 | 4.7★ | Shopping |
| Official Game AI | 🍎 | 1 | 4.6★ | Games |
| Offline Music Limited | 🍎 | 1 | 4.4★ | Utilities |
| Offroadin' LLC | 🍎 | 1 | 4.4★ | Navigation |
| Offsuit Games, Inc. | 🍎 | 1 | 4.6★ | Games |
| Oficina Presidencial de Tecnologias de la Informacion y Comunicacion | 🍎 | 1 | 2.6★ | Utilities |
| Ofix Ofis Malzemeleri A.Ş. | 🍎 | 1 | 5.0★ | Shopping |
| Ofly Tech Group Ltd | 🍎 | 1 | 4.7★ | Health & Fitness |
| Ofofonobs | 🍎 | 1 | 5.0★ | Finance |
| Ogden Publications, Inc. | 🍎 | 1 | 4.9★ | News |
| Oguz Cal | 🍎 | 1 | 4.3★ | Productivity |
| Oguz Coskun | 🍎 | 1 | 4.0★ | Social Networking |
| Oguz Demir | 🍎 | 1 | 4.3★ | Utilities |
| Oguz Furkan Ayaz | 🍎 | 1 | 3.5★ | Utilities |
| Oguz Guner | 🍎 | 1 | 4.3★ | Utilities |
| Oguz Kaytanci | 🍎 | 1 | 4.6★ | Productivity |
| Oguz YEGUL | 🍎 | 1 | — | Business |
| Oguzhan Demiroz | 🍎 | 1 | — | Games |
| Oguzhan YILDIRIM | 🍎 | 1 | — | Health & Fitness |
| Ogzatech Development Team | 🍎 | 1 | — | Shopping |
| Oh My Software | 🍎 | 1 | 4.1★ | Navigation |
| Oh Polly Ltd | 🍎 | 1 | 4.9★ | Shopping |
| OhLee | 🍎 | 1 | 5.0★ | Lifestyle |
| OhMD, Inc. | 🍎 | 1 | 4.8★ | Medical |
| Ohio Hoops Basketball, LLC | 🍎 | 1 | 4.9★ | Sports |
| Ohio Newspapers, Inc | 🍎 | 1 | 4.4★ | News |
| Ohio State University | 🍎 | 1 | 4.7★ | Medical |