| Name | Type | Country | Number |
|---|---|---|---|
| CommitStrip | Website publishing | France | 1 |
| CommitStrip | Editor | France | 1 |
| Compi H'sコンプH's | Magazine | Japan | 1 |
| Comptiqコンプティーク | Magazine | Japan | 6 |
| Cookieクッキー | Magazine | Japan | 3 |
| Coremagazineコアマガジン | Editor | Japan | 1 |
| Corona EXコロナEX | Website publishing | France | 1 |
| CR Comics DXCRコミックスDX | Imprint | Japan | 3 |
| Cum Comics Plusガムコミックスプラス | Imprint | Japan | 1 |
| Cycomiサイコミ | Website publishing | Japan | 3 |
| Cygames | Editor | Japan | 3 |