| Name | Region |
|---|---|
| ChemIntelligence | |
| ChêneWeb | Hauts-de-Seine |
| Cheops Technology | Gironde |
| Chibko | Pyrénées-Atlantiques |
| ChipWay | Métropole de Lyon |
| Cholet Dupont Oudart | |
| ChooseYourBoss | Paris |
| Choosit | Hérault |
| Chris Info Plus | Haute-Marne |
| Christian Grosbois | Sarthe |
| Christophe Jablonski | Val-d'Oise |
| Christopher Torrent | Paris |
| CHROM Interactiv | Vaucluse |
| CHROMagar | |
| Chronodisk | Paris |
| ChronoMicro | Paris |
| Churchill | |
| CIA Informatique | Yvelines |
| CIAG | Haute-Garonne |
| Cibel | Orne |
| CIC Market Solutions | |
| CID Auditeur | Alpes-Maritimes |
| CIDEAM | Rhône |
| Ciel Bleu | Aveyron |
| Ciel Télécom | Sarthe |
| Cigest-Informatique | Bas-Rhin |
| CIi-Industrielle | Sarthe |
| Cikaba | |
| Cilas | |
| CILcare | |
| CILEA | Métropole de Lyon |
| Ciloa Bio | |
| Cilpak | Val-de-Marne |
| Cimel Électronique | |
| CIMULEC | Moselle |
| CINEVR | |
| CINTEL | Val-de-Marne |
| Cintoo | Alpes-Maritimes |
| CIO Systèmes Embarqués | Loire |
| CIO-Online.com | Paris |
| Ciorane | Paris |
| Cipe Télécom | |
| Circem | Essonne |
| Circet | Var |
| CIRLY S.A.S. | Rhône |
| CIROCO | Hauts-de-Seine |
| Cirpack | Paris |
| CIRTEM | |
| CIS Valley | Gironde |
| CISA Informatique | Ain |