| Conduit VirtualConsumer | Consumer | Culver City, United States | — | conduit.gg |
| ConelabsOther | Other | Etobicoke, Canada | — | conelabs.ai |
| ConfettiOther | Other | Los Angeles, United States | Ronen Gafni | confetti.io |
| Conservation LabsOther | Other | Brownsville, United States | Josh Siegel | conservationlabs.com |
| ConspireOther | Other | Boulder, United States | Alex Devkar | conspire.com |
| Contera.aiOther | Other | Brasov, Romania | — | contera.ai |
| ConvergentB2B | B2B | London, United Kingdom | — | convergent.org |
| ConverSight.aiB2B | B2B | Indianapolis, United States | Santhosh Sivarajah | conversight.ai |
| ConvertFlowB2B | B2B | Miami, United States | Nathan Vander Heiden | convertflow.com |
| ConveyOther | Other | Austin, United States | Rob Taylor | getconvey.com |
| CooklistOther | Other | Dallas, United States | — | cooklist.co |
| CountertopSmartOther | Other | Austin, United States | — | countertopsmart.com |
| coUrbanizeOther | Other | Boston, United States | Karin Uhlich | courbanize.com |
| CourtsdeskB2B | B2B | Dublin, Ireland | — | courtsdesk.com |
| CovaticOther | Other | London, United Kingdom | Matthew Allatt | covatic.com |
| COVERRFintech | Fintech | New York City, United States | — | getcoverr.com |
| CoworksConsumer | Consumer | Raleigh, United States | — | coworksapp.com |
| CowTribeConsumer | Consumer | Tamale, Ghana | Gabriel Apea | cowtribe.com |
| CPRWrapHealthcare | Healthcare | Chattanooga, United States | — | cprwrap.com |
| Crave RetailB2B | B2B | Austin, United States | Bryan Mahoney | craveretail.com |
| Creation CrateEducation | Education | Scarborough, Canada | Ayan Pahwa | mycreationcrate.com |
| CredentiallyB2B | B2B | London, United Kingdom | Eduard Neither | credentially.io |
| CroctOther | Other | São Paulo, Brazil | Clay Anderson | croct.com |
| Cron SystemsOther | Other | New Delhi, India | Sunny Malhotra | cronsystems.com |
| CronwellOther | Other | Atlanta, United States | — | cronwell.ai |
| CrosscheckB2B | B2B | New York City, United States | — | crossxcheck.com |
| CrosscopeB2B | B2B | Mountain View, United States | — | crosscope.com |
| CrowdlyFintech | Fintech | Boston, United States | — | crowdly.com |
| CrowdTwistOther | Other | New York City, United States | Irving Fain | crowdtwist.com |
| Crux OCMB2B | B2B | Calgary, Canada | — | cruxocm.com |
| Crystal aOSOther | Other | Caulfield South, Australia | — | crystalaos.com |
| CuálB2B | B2B | Woodland Hills, United States | — | cual.co |
| CubbitB2B | B2B | Bologna, Italy | Lorenzo Posani | cubbit.io |
| CubeB2B | B2B | New York City, United States | Christina Ross | cubesoftware.com |
| CuePath InnovationOther | Other | Vancouver, Canada | — | cuepath.io |
| Curated for YouB2B | B2B | San Antonio, United States | — | curatedforyou.io |
| CuratedAIOther | Other | Brussels, Belgium | — | curatedai.eu |
| CuseumOther | Other | Boston, United States | Brendan Ciecko | cuseum.com |
| CustomerGluConsumer | Consumer | Bengaluru, India | Aditi Sinha | customerglu.com |
| Cut and ClarityOther | Other | New York City, United States | — | cutandclarity.co |
| CutoverOther | Other | London, United Kingdom | Ky Nichol | cutover.com |
| CuvvaOther | Other | London, United Kingdom | Freddy Macnamara | cuvva.com |
| Cyber DriveWareB2B | B2B | Herzliya, Israel | — | cyberdriveware.com |
| CyberOwlB2B | B2B | London, United Kingdom | Daniel Ng | cyberowl.io |
| CycleIndustrials | Industrials | Berlin, Germany | — | cycle.eco |
| Cypress HealthHealthcare | Healthcare | Los Angeles, United States | — | cypresshealth.io |
| CytodymeB2B | B2B | San Diego, United States | — | cytodyme.com |
| DABLFintech | Fintech | Fairfield, United States | — | dabl.io |
| DailyBurnFintech | Fintech | New York City, United States | — | dailyburn.com |
| DaitumOther | Other | Adelaide, Australia | — | daitum.com |