- Chicago Tribune
- Chicago Trolley & Double Decker Co.
- Chiji
- Chip City Cookies
- Chloe + Chad
- Chipolo
- Cholas x Chulas
- CHOOOSE
- Chris Collins Perfumes
- Christmas at Gaylord Hotels
- Christophe Robin
- Chicago Ritual
- Chrome Web Store
- Cig2o.com
- Cincinnati Enquirer
- Cincinnati Zoo
- Cisco Learning Network Store
- Citizen
- City Sights Miami
- Citymapper
- CitySights LA
- Cize
- Clean And Sober Love
- ClassicShaving
- CleanRest
- Cleveland Plain Dealer
- Cln Skin Care
- Closets are for Clothes
- Cloudalize
- CNBC
- Co-Star
- Co. by Colgate
- Cobra Kai
- Cokas Diko
- CollegeBacker
- Colorado Springs Business Journal
- Colorful
- Colour Coded by Coco
- Columbia Daily Tribune
- Columbia State
- Columbus Dispatch
- Columbus Craft Meats
- Condeco
- ConditionHER
- Confide
- Conjuguemos
- Connect Roasters
- Connecticut Post
- Connie Pow Lashes
- Conrad Hotels & Resorts
- Conrad
- ContactLenses Plus CA
- Contentsquare
- Contents HairCare
- Contra Costa Times
- Cooke Collective
- Cooking Light Diet
- CoolSculpting
- Coral Oral
- Cosmopolitan
- Cosmo-Cube
- Countrywide Paintball
- Coursera
- Cove Sleep Device
- Cozy Baby
- Crazy Aaron
- Creative Catalyst
- Credit Karma Tax
- Crispers
- Crocs Canada
- Crown Seven
- Cruise and Vacation Shop
- Crysis
- Curable
- Currys PC World
- Customize My Plates
- Custom Writing
- CUVER
- CYA
- Cyberweld