| 4901 | CORE | 1 |
| 4902 | Cosmic Realty | 1 |
| 4903 | Cosmo Agency | 1 |
| 4904 | Cospi | 1 |
| 4905 | Cossa.ru | 1 |
| 4906 | Co-Versia | 1 |
| 4907 | CraftGroup | 1 |
| 4908 | craftstories | 1 |
| 4909 | Crazy Studio | 1 |
| 4910 | CREAMSOUP DIGITAL | 1 |
| 4911 | Create D | 1 |
| 4912 | Creativ digital agency | 1 |
| 4913 | Creative Click | 1 |
| 4914 | Creative Click Studio | 1 |
| 4915 | Creativedog | 1 |
| 4916 | Creative SMM | 1 |
| 4917 | Creative Soldiers | 1 |
| 4918 | CREATOM - Маркетинговое агентство | 1 |
| 4919 | Creazard | 1 |
| 4920 | Creon PR | 1 |
| 4921 | Cretos | 1 |
| 4922 | Critical Creative | 1 |
| 4923 | crm24.team | ГК СНЕГ | 1 |
| 4924 | CRMSTROY | 1 |
| 4925 | Croc One | 1 |
| 4926 | CRON | 1 |
| 4927 | CronJ UI UX Design Company | 1 |
| 4928 | CropasKAZ | 1 |
| 4929 | Crop media | 1 |
| 4930 | Crosssale | 1 |
| 4931 | Cross Web | 1 |
| 4932 | Crystal-Context | 1 |
| 4933 | Crystal Spring | 1 |
| 4934 | CS-Cart | 1 |
| 4935 | CSN | 1 |
| 4936 | Cтудия графического дизайна «ПЭНТУЛ» | 1 |
| 4937 | Cтудия "Westpower" | 1 |
| 4938 | Cubo | 1 |
| 4939 | ЦУКЕР | 1 |
| 4940 | Cult Production | 1 |
| 4941 | Cursor | 1 |
| 4942 | Customar LLC | 1 |
| 4943 | Custom Software Development | 1 |
| 4944 | Цветная зебра | 1 |
| 4945 | CVG | 1 |
| 4946 | Cyan Ocean | 1 |
| 4947 | CyberForm Systems + Soft-works | 1 |
| 4948 | Cyberful | 1 |
| 4949 | Cyberica, веб-студия | 1 |
| 4950 | CYBERNATIV | 1 |
