| Castify✉ | ▶️ | 1 | 4.6★ | Video Players & Editors |
| Casting Networks LLC | 🍎 | 1 | 4.7★ | Productivity |
| Castle Andersen ApS | 🍎 | 1 | 4.7★ | Medical |
| Castle Information Systems, Inc. | 🍎 | 1 | 4.8★ | Productivity |
| Castle Labs LLC | 🍎 | 1 | 5.0★ | Productivity |
| Castle Rock Associates, Inc. | 🍎 | 1 | 2.9★ | Travel |
| Castlight Health | 🍎 | 1 | 4.8★ | Health & Fitness |
| Castly✉ | ▶️ | 1 | 3.3★ | Tools |
| Casual Arena | 🍎 | 1 | 3.9★ | Games |
| Casual Dating Community Apps✉ | ▶️ | 1 | 4.3★ | Dating |
| Casual Game Dev✉ | ▶️ | 1 | 4.9★ | Trivia |
| Casual Hookup Dating Apps✉ | ▶️ | 1 | 4.0★ | Dating |
| Casual Skill Games✉ | ▶️ | 1 | 4.6★ | Card |
| Casual Social Apps✉ | ▶️ | 1 | 3.1★ | Dating |
| Casual Underground | 🍎 | 1 | 4.1★ | Music |
| Casualx Personals✉ | ▶️ | 1 | 4.6★ | Dating |
| Cat Bakery, LLC | 🍎 | 1 | — | Productivity |
| Cat House Corp. | 🍎 | 1 | 4.9★ | Shopping |
| Cat Lab✉ | ▶️ | 1 | 3.6★ | Role Playing |
| Catalin Gabriel Miron | 🍎 | 1 | — | Entertainment |
| Catalyst Global | 🍎 | 1 | 3.9★ | Games |
| CatalystApps.✉ | ▶️ | 1 | 4.8★ | Simulation |
| Catalystwo Limited | 🍎 | 1 | 3.3★ | Education |
| Catalytic Venture, Inc. | 🍎 | 1 | 4.6★ | Finance |
| Catalyze Data Ltd. | 🍎 | 1 | 5.0★ | Education |
| Catamount Access Television Corporation | 🍎 | 1 | 5.0★ | Education |
| Catawiki | 🍎 | 1 | 4.8★ | Shopping |
| Catch Social, Inc. | 🍎 | 1 | 4.8★ | Education |
| Catch Swim Ltd | 🍎 | 1 | — | Health & Fitness |
| CatchItPlay, Inc. | 🍎 | 1 | 4.6★ | Education |
| CatchPlay, Inc. | 🍎 | 1 | 4.8★ | Entertainment |
| Catchup Technologies Private Limited | 🍎 | 1 | 4.7★ | Entertainment |
| Catchy | 🍎 | 1 | 4.7★ | Shopping |
| Caterings | 🍎 | 1 | 3.7★ | Food & Drink |
| Caterpillar Inc.✉ | ▶️ | 1 | 2.9★ | Business |
| Catfantom✉ | ▶️ | 1 | 4.7★ | Tools |
| Catfish Animation Studio✉ | ▶️ | 1 | 4.1★ | Medical |
| Catforce Studio | 🍎 | 1 | — | ENTERTAINMENT |
| Cathal MORRISON | 🍎 | 1 | 3.7★ | Photo & Video |
| Cathay Bank | 🍎 | 1 | 4.5★ | Finance |
| Cathay Healthcare Management | 🍎 | 1 | 2.2★ | Health & Fitness |
| Cathay Pacific Airways Limited | 🍎 | 1 | 4.6★ | Travel |
| Catherine Easton | 🍎 | 1 | 4.3★ | Reference |
| Catherine Lopez | 🍎 | 1 | 4.2★ | Entertainment |
| Catherine Zanbaka | 🍎 | 1 | 5.0★ | Education |
| Catholic Health System of Long Island, Inc. | 🍎 | 1 | 4.6★ | Medical |
| Catholic Match | 🍎 | 1 | 3.9★ | Social Networking |
| CatholicMatch✉ | ▶️ | 1 | 2.0★ | Dating |
| Cathy Checora | 🍎 | 1 | 4.8★ | Entertainment |
| Catloaf Software LLC | 🍎 | 1 | 4.6★ | Education |