- C-Side Records (1)
- C2 Media Relations (24)
- C3 Press (1)
- Cafcae Records (1)
- Caitlin St. Pierre (26)
- Calabro Music Media (224)
- Caleb A. Calhoun (8)
- Cali Conscious (1)
- Cali Lacey (1)
- Callanan and Klein Communications (35)
- Camarofox PR (1)
- Cameron B. Gunnoe (4)
- Cameron Lalor (1)
- Camille Cushman (9)
- Camp Bisco (1)
- Camp Euforia (9)
- Campbell Entertainment Group (1)
- Campfest (3)
- Candice Dollar (36)
- Candy and Flowers (3)
- Cannon Crompton (1)
- Canvas Sounds (1)
- Cape Cod Beer (1)
- Care2 (2)
- Caren West PR (67)
- Carmel O'Farrell (1)
- Carmen Cojocariu (9)
- Carry On Music (4)
- Carter Shelter (9)
- Cash Edwards Music Services (77)
- CashorTrade (1)
- Cassidy Maley (35)
- CASTLEROCK ASSET MANAGEMENT (1)
- Cat Family Records (1)
- Catalyst Publicity Group (2)
- Catawba College (1)
- Catherine Akridge (1)
- Cause Time (3)
- Cave Flowers (1)
- CCookMedia (1)
- Centripetal Force (2)
- Cervantes Masterpiece Ballroom (29)
- Chad Breeden (1)
- Chambers Media Solutions (3)
- Champagne House Media (3)
- Charla Harvey (6)
- Charles Sokoloff (40)
- Charm factory (4)
- Charm School Media (5)
- Chautauqua (33)
- Chelsey Bentley (1)
- Cheryl Duncan and Company (1)
- Chicago Office of Tourism and Culture (1)
- Chipster PR (45)
- Chloe Robinson (1)
- Chris (7)
- Chris Blackmore (1)
- Chris Eastment (1)
- Chris Marden (57)
- Chris Naugle (18)
- Chris Stegner (3)
- Christina Bosch (1)
- Christina Jensen PR (2)
- Christine Moad (1)
- Christopher Kemp (26)
- Christopher Snyder (30)
- Chromatic Publicity (13)
- Chummy PR (68)
- Cico Casartelli (1)
- CID Entertainment (1)
- CK Communications Group (161)
- Clairvoyant PR (12)
- Clarion Call Media (3)
- CLIMATE CONTROL PROJECTS (2)
- Cloud 9 Adventures (5)
- Coakley Press (1)
- Cobblestone Live (2)
- Cobra Camanda Publicity (10)
- CoCreate Boulder (2)
- Cody Lane (1)
- Collective Thought (1)
- Color Red (53)
- Colorado Symphony (3)
- Columbia Records (3)
- Comedy Central (4)
- Comes with Fries (1)
- Communications 21 (3)
- Compass Records (31)
- Conqueroo (247)
- Conscious Alliance (1)
- ConsciousAlliance (1)
- Conspiratorband.com (3)
- CornflowerMusic (1)
- Cosa Nostra PR (1)
- Cosmic Collective (1)
- Cosmic Ray (1)
- Counterpoint (1)
- Country Music Hall of Fame and Museum (2)
- Cousin Earth (5)
- Craft Recordings (15)
- Craig Guerra (3)
- Crash Avenue (3)
- Creative Condition (1)
- Creative Entertainment Group (5)
- Creative Entertainment Network (2)
- Crissy Cuthbertson (2)
- Crista67 (1)
- Crossover Media (12)
- Crossover Touring (1)
- Crossroads Label Group (2)
- Crowe PR (12)
- Crown Jül PR (105)
- Crystal Hayes (1)
- Cuneiform Records (1)
- Curation Records (2)
- Curley Street Media (1)
- Current Swell (1)
- CWPR LLC (2)
- Cyber PR (3)
- Cyrus Rhodes (7)