| HullB2B | B2B | Paris, France | Nicolas Deserranno | hull.io |
| Human ArchiveIndustrials | Industrials | — | | humanarchive.ai |
| Human BehaviorB2B | B2B | San Francisco, United States | | humanbehavior.co |
| HumanitruB2B | B2B | Richmond, United States | — | toteminsights.com |
| HumanityHealthcare | Healthcare | — | Michael Geer | humanity.health |
| HumbrelaOther | Other | Vevey, Switzerland | — | humbrela.com |
| HumoniqB2B | B2B | San Francisco, United States | Todd Sullivan | humoniq.ai |
| 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 |
| HypercubicB2B | B2B | — | Sai Gurrapu | hypercubic.ai |
| HyperkelpOther | Other | Encinitas, United States | — | hyperkelp.com |
| Hyperspec AIOther | Other | Woodland, United States | Siddha Ganju | hyperspec.ai |
| HyperspellB2B | B2B | San Francisco, United States | | hyperspell.com |
| 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 |
| IcarusIndustrials | Industrials | Los Angeles, United States | | icarus.one |
| ICM HubOther | Other | New York City, United States | — | icmhub.com |
| Ideogram AIB2B | B2B | — | Mohammad Norouzi | ideogram.ai |
| IdlerB2B | B2B | San Francisco, United States | | idler.ai |
| 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 |
| IllumioB2B | B2B | — | Andrew Rubin | illumio.com |
| Imagine AIB2B | B2B | — | | imagineai.me |
| ImmagnifyB2B | B2B | Kefar Sava, Israel | — | immagnify.com |
| ImmersedConsumer | Consumer | Cincinnati, United States | Renji Bijoy | immersed.com |
| ImpalaConsumer | Consumer | London, United Kingdom | Ben Stephenson | impala.travel |
| ImpersonB2B | B2B | Culver City, United States | Eyal Pfeifel | imperson.com |
| ImpreziaB2B | B2B | — | | imprezia.ai |
| ImproovyOther | Other | Chicago, United States | Jake Kahana | improovy.com |
| IMRSVOther | Other | New York City, United States | — | imrsv.com |
| INBOTIQAOther | Other | London, United Kingdom | Ulrika Jägare | inbotiqa.com |
| IncidentFoxB2B | B2B | San Francisco, United States | | incidentfox.ai |
| InclusivvOther | Other | Atlanta, United States | Jeremy Balkin | inclusivv.co |
| IndexableB2B | B2B | San Francisco, United States | Andrew Gazelka | ix.dev |
| Indico DataB2B | B2B | Boston, United States | Slater Victoroff | indico.io |
| IndieFlowOther | Other | Santa Monica, United States | — | indieflow.me |
| Induction Food SystemsIndustrials | Industrials | Durham, United States | — | inductionfoodsystems.com |
| InfinitB2B | B2B | Paris, France | — | infinit.sh |
| Infinite Composites TechnologiesIndustrials | Industrials | Tulsa, United States | Eric Lund | infinitecomposites.com |
| Influunt SystemsIndustrials | Industrials | Barcelona, Spain | — | influunt.ai |
| InjoyOther | Other | Montréal, Canada | — | injoy.bio |