| HeyAxelB2B | B2B | Paris, France | — | heyaxel.com |
| HidrateOther | Other | Minneapolis, United States | Nadya Nguyen | hidratespark.com |
| High Time FoodsOther | Other | Cambridge, United States | — | hightimefoods.com |
| Highly LiquidOther | Other | Salt Lake City, United States | — | highlyliquid.xyz |
| hiitideIndustrials | Industrials | Chicago, United States | — | hiitide.com |
| HikiConsumer | Consumer | Brooklyn, United States | Jamison Hill | hikiapp.com |
| HILOSIndustrials | Industrials | Portland, United States | — | hilos.studio |
| HiredUpAIB2B | B2B | Miami, United States | — | hiredupai.com |
| HireguideB2B | B2B | Santa Monica, United States | Scott Barstow | hireguide.com |
| Hive OwnershipB2B | B2B | Brooklyn, United States | — | hiveownership.com |
| Hive PowerIndustrials | Industrials | Manno, Switzerland | Serge Ravet | hivepower.tech |
| HiveclassEducation | Education | Bridgehampton, United States | Lindsey Mase | hiveclass.co |
| hiveonlineFintech | Fintech | Copenhagen, Denmark | Sofie Blakstad | hivenetwork.online |
| hobbyDBOther | Other | Superior, United States | Christian Braun | hobbydb.com |
| HolloB2B | B2B | Paris, France | — | hollo.io |
| HololinkB2B | B2B | Copenhagen, Denmark | Casper Freksen | hololink.io |
| HolotchOther | Other | Tokyo, Japan | — | holotch.com |
| HomeBinderOther | Other | Burlington, United States | Brian Tuite | homebinder.com |
| Honest JobsB2B | B2B | Columbus, United States | Honest Jobs | honestjobs.co |
| Hoovu FreshOther | Other | Bengaluru, India | Madhura Dasgupta Sinha | hoovufresh.com |
| Hop In TechnologiesB2B | B2B | Toronto, Canada | — | hopintech.com |
| HormonaOther | Other | Weybridge, United Kingdom | Karolina Löfqvist | hormona.io |
| Hormonious FloHealthcare | Healthcare | London, United Kingdom | — | hormoniousflo.com |
| Hosta a.i.B2B | B2B | Cambridge, United States | Dylan Sale | hosta.ai |
| HowlerConsumer | Consumer | Johannesburg, South Africa | Patrick Hankinson | howler.co.za |
| HrmonyB2B | B2B | Berlin, Germany | Maximilian Mauroner | hrmony.de |
| HublyFintech | Fintech | Vancouver, Canada | — | myhubly.com |
| HullB2B | B2B | Paris, France | Nicolas Deserranno | hull.io |
| HumanitruB2B | B2B | Richmond, United States | — | toteminsights.com |
| HumbrelaOther | Other | Vevey, Switzerland | — | humbrela.com |
| HutsyFintech | Fintech | Toronto, Canada | — | hutsy.ca |
| HyBirdB2B | B2B | London, United Kingdom | — | hybirdtech.com |
| Hydro Wind EnergyIndustrials | Industrials | London, United Kingdom | — | hw.energy |
| Hydrologistics AfricaOther | Other | Nairobi, Kenya | — | hydroiq.africa |
| HydrosatB2B | B2B | Washington, United States | Pieter Fossel | hydrosat.com |
| Hyper TechnologiesFintech | Fintech | New York City, United States | — | gohyper.ai |
| HyperkelpOther | Other | Encinitas, United States | — | hyperkelp.com |
| Hyperspec AIOther | Other | Woodland, United States | Siddha Ganju | hyperspec.ai |
| HyreB2B | B2B | Ottawa, Canada | — | hyrestaff.com |
| i-Brain TechOther | Other | Ramat Gan, Israel | — | i-brain.tech |
| i-flowB2B | B2B | Munich, Germany | — | i-flow.io |
| iambuddy.comOther | Other | Richmond, United States | — | iambuddy.com |
| Icardio.AIHealthcare | Healthcare | Los Angeles, United States | — | icardio.ai |
| ICM HubOther | Other | New York City, United States | — | icmhub.com |
| IdylloOther | Other | Washington, United States | — | idyllo.com |
| Igugu GlobalOther | Other | Johannesburg, South Africa | — | igugu.global |
| illumifyDxB2B | B2B | Broomfield, United States | — | illumifydx.com |
| illuminemOther | Other | Pistoia, Italy | Alberto Carrara | illuminem.com |
| ImmagnifyB2B | B2B | Kefar Sava, Israel | — | immagnify.com |
| ImmersedConsumer | Consumer | Cincinnati, United States | Renji Bijoy | immersed.com |