C
- C.A. El Universo
- C2C Journal
- Ca Art Studio Creative Publishing
- Caaliope Comunication
- Cairo Editore Spa
- Calcalist
- California Media International, Inc - Kabari
- Callaghan SA
- Camara de Comercio Binacional Ecuatoriano Italiana CBEI
- Cambodge Soir Hebdo
- Canada Wide Media Limited
- Canada’s National History Society
- Canadian Affairs News Inc.
- Canadian Art
- Canadian Broadcast Corporation
- Canadian Jewish News
- Canadian Wildlife Federation
- Canjex Publishing
- Cannes Market News
- Canterbury Migrants Centre
- Canvas Central FZ LLC
- Capital Buz Group, LLC T/A Capital Analytics
- CAPITAL GESTION EDITORIAL, S.L
- Capital Media
- Capital Media SA de CV
- Capital Publishing Limited
- CAPTION Magazine
- Car Plus Limited
- Career Savvy
- Caribe Magazine
- Caribou Media Group
- CARNEWSNET Co.,Ltd.
- Casa Editorial El Tiempo
- Cascadia Newspaper Co LLC
- Castle Media
- Casual Magazines
- Catalina Magazine
- Cathay Pacific Airways Limited
- Cathedral High School
- Catron Courier
- Causette Magazine
- Causeur
- Caxton Local Media
- Caxton publications
- Cayman Free Press
- CBMedia
- CCC LLP (Kazakhstan)
- CED Digital Gruppo Messaggero (Italy)
- Centaur Publishing
- Centauria SRL