| Canopy AerospaceOther | Other | Chicago, United States | — | canopyaerospace.com |
| CAPE InclusionB2B | B2B | Parker, United States | — | capeinclusion.com |
| Captain AIOther | Other | London, United Kingdom | Jeroen Bot | captain.ai |
| Captain's EyeB2B | B2B | Haifa, Israel | — | captain-eye.com |
| CaptainVetHealthcare | Healthcare | Brest, France | — | captainvet.com |
| CaptureProofHealthcare | Healthcare | San Francisco, United States | — | captureproof.com |
| CaravelB2B | B2B | Portland, United States | — | caravelapp.com |
| CarbideB2B | B2B | Sydney, Canada | — | carbidesecure.com |
| Carbon LimitIndustrials | Industrials | Boca Raton, United States | — | carbonlimit.com |
| CareAcademyEducation | Education | Cambridge, United States | Helen Adeosun | careacademy.com |
| CareCopilotHealthcare | Healthcare | New York City, United States | — | carecopilot.co |
| CargofiveIndustrials | Industrials | Lisbon, Portugal | Jaime Izquierdo | cargofive.com |
| CaribShopperOther | Other | Miami, United States | — | caribshopper.com |
| CariqaIndustrials | Industrials | Berlin, Germany | — | cariqa.com |
| Carré MobilityOther | Other | Berlin, Germany | — | carre-mobility.de |
| CarServOther | Other | Austin, United States | — | carserv.com |
| CascadeOther | Other | Shibuya, Japan | — | cascaded.ai |
| Case StatusOther | Other | Birmingham, United States | Wesley Charnock | casestatus.com |
| CaseCTRLHealthcare | Healthcare | Sugar Land, United States | — | casectrl.com |
| Cash AbroadFintech | Fintech | Mexico City, Mexico | — | cashabroad.one |
| CashDirectorB2B | B2B | Warsaw, Poland | Jakub Lolo | cashdirector.com |
| CashforceB2B | B2B | Antwerpen, Belgium | Nicolas Christiaen | cashforce.com |
| caspa AIOther | Other | Oxford, United Kingdom | Vish Inbaraj | caspa.ai |
| CassieIndustrials | Industrials | Virginia Beach, United States | — | aircassie.com |
| Cast CorporationB2B | B2B | San Carlos, United States | Elvis Lieban | cast.app |
| Catalyx SpaceOther | Other | San Francisco, United States | — | spacerickshaw.com |
| CatlogB2B | B2B | Lagos, Nigeria | Raza Morani | catlog.shop |
| CellONOther | Other | Oslo, Norway | — | cellon.one |
| Cemento.AIOther | Other | Tel Aviv, Israel | Amir Kfir | cemento.ai |
| CentinelOther | Other | Chicago, United States | — | yourcentinel.com |
| CERPROOther | Other | Berlin, Germany | — | cerpro.io |
| CertaB2B | B2B | Saratoga, United States | Jag Lamba | getcerta.com |
| ChainFintech | Fintech | Ciudad de México, Mexico | — | wechain.mx |
| ChainalysisFintech | Fintech | New York City, United States | Michael Gronager | chainalysis.com |
| ChambrEducation | Education | New York City, United States | — | chambr.us |
| ChangEdFintech | Fintech | Chicago, United States | Nick Martini | gochanged.com |
| Charter SpaceOther | Other | London, United Kingdom | — | charter.space |
| ChassyB2B | B2B | Renton, United States | — | chassy.io |
| CheerfyOther | Other | London, United Kingdom | — | cheerfy.com |
| Chi AIB2B | B2B | Alpharetta, United States | — | thechi.app |
| chowboticsOther | Other | Redwood City, United States | Deepak Sekar | chowbotics.com |
| CICLA 3DOther | Other | Tampa, United States | — | cicla3dshop.com |
| CinchyB2B | B2B | Toronto, Canada | Dan DeMers | cinchy.com |
| CIPRA.aiOther | Other | San Diego, United States | — | cipra.ai |
| Circa LabsFintech | Fintech | Bridgeport, United States | — | wearecirca.com |
| CircuitOther | Other | Huntingdon, United Kingdom | Hal Watts | getcircuit.com |
| CircularPlaceIndustrials | Industrials | Meudon, France | — | circularplace.fr |
| CISGAMOther | Other | Cerritos, United States | — | cisgam.com |
| Citrus OncologyOther | Other | Cary, United States | — | citrusoncology.com |
| CitruslabsIndustrials | Industrials | Santa Monica, United States | Nora Abousteit | citruslabs.com |