- Cadbury World UK
- Canmake USA
- Canva
- Canvas By Numbers
- Capillus
- CarCovers
- Carpuride
- Castleson DK
- Central College for Education
- Certified Watch Store
- Cheech And Chong
- Chefman
- Chelon
- ChessHouse
- Chike Nutrition
- CIARRA Appliances
- City Beach
- City Travel
- City Travel UK
- Civant Skin Care
- Claires
- Cleanster
- Clickinks
- Cloud Nine
- Cloudways
- Club Med
- CocoBeauty
- Code Camp
- College Concierge
- Colours Of My Life
- Comfrt
- Commomy Decor
- CompAndSave
- Complemar Print
- Consumer Crafts
- Contour Cube
- CoolHandle
- Corkk UK
- Cosmos UK
- Cosset
- Coverado
- Craft 56 UK
- Craft Resin
- Cricut
- Cupshe
- Customon
- Custype
- Cycle Parts
- Cyclevin
- Cylance
