| Otourou Da Costa | 🍎 | 1 | 4.0★ | Productivity |
| Otrium | 🍎 | 1 | 4.9★ | Shopping |
| Otselic Valley Central School District | 🍎 | 1 | 3.7★ | Education |
| Otsuka Precision Health, Inc. | 🍎 | 1 | 3.9★ | Medical |
| Ottegi | 🍎 | 1 | 4.5★ | Lifestyle |
| Otten | 🍎 | 1 | 4.5★ | Shopping |
| Otter App | 🍎 | 1 | 4.6★ | Food & Drink |
| Otter.ai, Inc. | 🍎 | 1 | 4.7★ | Productivity |
| Otto Financial Solutions inc | 🍎 | 1 | 5.0★ | Business |
| Otto GmbH & Co. KGaA | 🍎 | 1 | 4.6★ | Shopping |
| Otto Pilot Software LLC | 🍎 | 1 | 4.5★ | Travel |
| Otto Ranta-Ojala | 🍎 | 1 | 5.0★ | Weather |
| Otto Stromberg | 🍎 | 1 | — | Games |
| Ottotree Entertainment Sdn Bhd | 🍎 | 1 | 3.0★ | Entertainment |
| Otus Imaging | 🍎 | 1 | 4.0★ | Photo & Video |
| Oudone Inthanavong | 🍎 | 1 | — | Shopping |
| Oui Therapeutics, Inc | 🍎 | 1 | — | Medical |
| Ouino Languages | 🍎 | 1 | 5.0★ | Education |
| Our Days LLC | 🍎 | 1 | 4.7★ | Lifestyle |
| Our Platform Corp. | 🍎 | 1 | 4.6★ | Shopping |
| OurBigAdventure, LLC | 🍎 | 1 | 4.4★ | Entertainment |
| OurCal Ltd. | 🍎 | 1 | 4.7★ | Productivity |
| OurCalling Inc | 🍎 | 1 | 4.7★ | Lifestyle |
| OurFamilyWizard, LLC | 🍎 | 1 | 4.6★ | PRODUCTIVITY |
| OurGroceries, Inc. | 🍎 | 1 | 4.8★ | Shopping |
| OurSeniors.org Inc | 🍎 | 1 | 5.0★ | Lifestyle |
| OurShopee FZE | 🍎 | 1 | 4.0★ | Shopping |
| Oura Health Oy | 🍎 | 1 | 4.9★ | HEALTH_AND_FITNESS |
| Ourbit Holdings Ltd | 🍎 | 1 | 4.8★ | Finance |
| Oussama Anedam | 🍎 | 1 | — | Health & Fitness |
| Oussama Chariffi | 🍎 | 1 | 4.0★ | Music |
| Oussama Ouazize | 🍎 | 1 | — | Productivity |
| Out The Mud Ventures Inc. | 🍎 | 1 | 4.6★ | Music |
| Out of the Park Developments | 🍎 | 1 | — | GAMES_SPORTS |
| Out to Lunch Productions, LLC | 🍎 | 1 | 4.6★ | Entertainment |
| OutFit Lab Inc. | 🍎 | 1 | 4.8★ | Shopping |
| OutSmart International B.V. | 🍎 | 1 | 5.0★ | Productivity |
| OutWest Systems, Inc. | 🍎 | 1 | 5.0★ | Utilities |
| Outback Steakhouse | 🍎 | 1 | 4.8★ | Food & Drink |
| Outbox LLC | 🍎 | 1 | 4.9★ | Productivity |
| Outcon | 🍎 | 1 | — | Shopping |
| Outdoor Adventure Klub ApS | 🍎 | 1 | 4.9★ | Travel |
| Outdoor Afro | 🍎 | 1 | 4.8★ | Lifestyle |
| Outdoor Class LLC | 🍎 | 1 | 4.8★ | Education |
| Outdoor Coders | 🍎 | 1 | — | Education |
| Outdoorsy Software LLC | 🍎 | 1 | 3.3★ | Travel |
| Outer Banks Sports Club Inc. | 🍎 | 1 | — | Health & Fitness |
| Outer Corner, Unipessoal LDA | 🍎 | 1 | 4.6★ | Productivity |
| Outer Limits Media | 🍎 | 1 | 4.8★ | Education |
| Outerminds Inc. | 🍎 | 1 | 4.9★ | Games |