By customer
- Caja de Compensación Familiar (CAFAM)
- Callico Distributors
- Camar S.p.A.
- CANCOM IT Solutions GmbH
- CBP
- Cegedim Activ
- Centre for Railway Information Systems
- Chandra Asri
- C.H. Briggs
- Chickasaw Nation Division of Commerce
- China Ocean Shipping (Group) Company - COSCO
- China Railway Materials Commercial Corporation
- China Telecom Corporation Limited
- Chinese Academy of Sciences (Video)
- Chinese Academy of Sciences
- Chinese Insurance Company (CIC)
- Chinese municipal government
- CHT R. Beitlich GmbH
- City of Burnaby
- City of Dresden IT and Organization Services
- CLS Bank
- CLS Group
- Coca-Cola Bottling Co. Consolidated (CCBCC)
- COFCO China Foods Ltd
- Colgate-Palmolive
- Commonwealth Bank of Australia
- Computer Guidance
- Connectria Corporation
- Consolidated Edison Company of New York (Con Edison)
- Constantia Hueck Folien GmbH & Co. KG
- Controlar S.A.
- ConvaTec
- Coop Consorzio Nord Ovest (CCNO)
- Corporate Express Australia Limited
- CRH Europe Distribution
- Cyprus Telecommunications Authority