YC Defense

39 companies · 39 active · 36% AI · most in S26 (8)

0.securityThe autonomous cybersecurity teamYC F26San FranciscoStartup →Other

CaladhAnti-drone defense for the maritime domainYC F26BostonStartup →AI

ChemPilot.aiDiscover novel defense related materials/molecules.YC F26San FranciscoStartup →Other

Inflection Space SystemsHyperscaling space manufacturingYC F26Los AngelesStartup →Other

Kairox SystemsAutonomous drones that fly and swimYC F26San FranciscoStartup →Other

KeresKill the drone, keep the jet. Reusable unmanned interceptors.YC F26DenverStartup →AI

Polemos IndustriesAI-guided ballistic missiles, built for mass manufacturingYC F26San FranciscoStartup →Other

Applied Electrodynamics, Inc.A new kind of camera that can see through walls.YC S26San FranciscoStartup →Other

EdgerunMilitary exoskeletonsYC S26San FranciscoStartup →Other

Greypoint IndustriesBuilding drone swarms that hunt hidden enemies.YC S26San FranciscoStartup →AI

GUILDMaking Defense Manufacturing Faster and CheaperYC S26New York CityStartup →Other

Mass MagneticsUSA-made magnetics for robotics and defense.YC S26BostonStartup →Other

Salem Robotics IncDeploying robots to replace workers in hazardous spacesYC S26San FranciscoStartup →AI

Synapse SemiconductorNew semiconductors that merge compute and visionYC S26DurhamStartup →Other

Vernius Systems, Inc.Mass-deployable radars for air defenseYC S26San FranciscoStartup →Other

Arlo IndustriesTrack drones and missiles without radars - Accurate, Passive, ScalableYC X26New York CityStartup →AI

BayMachinesAir-gapped compute for defense contractorsYC X26San FranciscoStartup →Other

OrnadyneWe're building robot birds for surveillance.YC X26Los AngelesStartup →AI

Seeing SystemsModular AI-Commanded Drones for DefenceYC W26LondonStartup →Other

IcarusStratospheric birds for defenseYC F25Los AngelesStartup →AI

LakoniaDelivering AI-powered situational awareness in tactical environments.YC F25San FranciscoStartup →Other

ProxAir-breathing hypersonics for scale.YC F25HawthorneStartup →Other

WardstoneThe Modular Interceptor PlatformYC F25Los AngelesStartup →Other

Albacore Inc.Drone submarinesYC S25PhiladelphiaStartup →AI

ConntourQuery mission-critical videoYC W25Tel Aviv-YafoStartup →AI

ConsusThe fastest and cheapest way to use AI with ITAR or CUI data.YC F24San FranciscoStartup →AI

RiskCubeAI commercial insurance brokerage for startups.YC F24San FranciscoStartup →Other

TheseusGPS Denied Navigation for DronesYC S24San FranciscoStartup →Other

VendraCustom Parts, Manufactured in America 🇺🇸YC S24San FranciscoStartup →AI

BasaltConstellations as a ServiceYC W24San FranciscoStartup →AI

CapuchinSearch and automation for engineer-to-order companiesYC W22San FranciscoStartup →Other

HEO RoboticsWe visually monitor space objects for governments and defenseYC S21SydneyStartup →AI

Malloc IncAI-driven mobile cybersecurityYC S21NicosiaStartup →Other

OnebriefOnebrief makes military headquarters run seamlesslyYC S21HonoluluStartup →Other

Hermes RoboticsAutonomous street sweeping as a service by retro-fitting vehiclesYC W21San FranciscoStartup →Other

RavnRavn is building a heads-up display for soldiers.YC W19BostonStartup →Other

ApolloShieldApolloShield is a system that detects unwanted drones and drives them…YC S16Tel Aviv-YafoStartup →Other

AlchemyNanotechnology-enabled coatings for automotive and defence sectorsYC S14WaterlooStartup →Other

Per VicesBuilding Mission Critical Software Defined Radio products.YC W12TorontoStartup →

Company	Category	Status	Program
0.securityThe autonomous cybersecurity teamteam of 2YC F26ActiveAI, Devtools	AI, Devtools	Active	YCF26
CaladhAnti-drone defense for the maritime domainYC F26ActiveOther	Other	Active	YCF26
ChemPilot.aiDiscover novel defense related materials/molecules.team of 3YC F26ActiveAI	AI	Active	YCF26
Inflection Space SystemsHyperscaling space manufacturinghiringYC F26ActiveOther	Other	Active	YCF26
Kairox SystemsAutonomous drones that fly and swimteam of 3YC F26ActiveOther	Other	Active	YCF26
KeresKill the drone, keep the jet. Reusable unmanned interceptors.team of 3YC F26ActiveOther	Other	Active	YCF26
Polemos IndustriesAI-guided ballistic missiles, built for mass manufacturingteam of 3YC F26ActiveAI	AI	Active	YCF26
Applied Electrodynamics, Inc.A new kind of camera that can see through walls.team of 5YC S26ActiveOther	Other	Active	YCS26
EdgerunMilitary exoskeletonsteam of 12hiringYC S26ActiveOther	Other	Active	YCS26
Greypoint IndustriesBuilding drone swarms that hunt hidden enemies.team of 4YC S26ActiveOther	Other	Active	YCS26
GUILDMaking Defense Manufacturing Faster and Cheaperteam of 2hiringYC S26ActiveAI	AI	Active	YCS26
Mass MagneticsUSA-made magnetics for robotics and defense.team of 3YC S26ActiveOther	Other	Active	YCS26
Salem Robotics IncDeploying robots to replace workers in hazardous spacesteam of 2YC S26ActiveOther	Other	Active	YCS26
Synapse SemiconductorNew semiconductors that merge compute and visionteam of 2hiringYC S26ActiveAI	AI	Active	YCS26
Vernius Systems, Inc.Mass-deployable radars for air defenseteam of 3hiringYC S26ActiveOther	Other	Active	YCS26
Arlo IndustriesTrack drones and missiles without radars - Accurate, Passive, Scalableteam of 3hiringYC X26ActiveOther	Other	Active	YCX26
BayMachinesAir-gapped compute for defense contractorsteam of 7YC X26ActiveAI, Devtools	AI, Devtools	Active	YCX26
OrnadyneWe're building robot birds for surveillance.team of 4YC X26ActiveOther	Other	Active	YCX26
Seeing SystemsModular AI-Commanded Drones for Defenceteam of 7hiringYC W26ActiveAI	AI	Active	YCW26
IcarusStratospheric birds for defenseteam of 50hiringYC F25ActiveOther	Other	Active	YCF25
LakoniaDelivering AI-powered situational awareness in tactical environments.team of 2YC F25ActiveAI	AI	Active	YCF25
ProxAir-breathing hypersonics for scale.team of 3hiringYC F25ActiveOther	Other	Active	YCF25
WardstoneThe Modular Interceptor Platformteam of 8hiringYC F25ActiveOther	Other	Active	YCF25
Albacore Inc.Drone submarinesteam of 18YC S25ActiveOther	Other	Active	YCS25
ConntourQuery mission-critical videoteam of 20YC W25ActiveAI	AI	Active	YCW25
ConsusThe fastest and cheapest way to use AI with ITAR or CUI data.hiringYC F24ActiveAI, Devtools	AI, Devtools	Active	YCF24
RiskCubeAI commercial insurance brokerage for startups.team of 3YC F24ActiveAI	AI	Active	YCF24
TheseusGPS Denied Navigation for Dronesteam of 7hiringYC S24ActiveOther	Other	Active	YCS24
VendraCustom Parts, Manufactured in America 🇺🇸team of 10hiringYC S24ActiveOther	Other	Active	YCS24
BasaltConstellations as a Serviceteam of 10YC W24ActiveAI	AI	Active	YCW24
CapuchinSearch and automation for engineer-to-order companiesteam of 5YC W22ActiveAI, Data	AI, Data	Active	YCW22
HEO RoboticsWe visually monitor space objects for governments and defenseteam of 3YC S21ActiveOther	Other	Active	YCS21
Malloc IncAI-driven mobile cybersecurityteam of 10YC S21ActiveAI	AI	Active	YCS21
OnebriefOnebrief makes military headquarters run seamlesslyteam of 2002 programsYC S21 +1ActiveOther	Other	Active	YC +1S21
Hermes RoboticsAutonomous street sweeping as a service by retro-fitting vehiclesteam of 52 programsYC W21 +1ActiveOther	Other	Active	YC +1W21
RavnRavn is building a heads-up display for soldiers.team of 10YC W19ActiveOther	Other	Active	YCW19
ApolloShieldApolloShield is a system that detects unwanted drones and drives them…YC S16ActiveOther	Other	Active	YCS16
AlchemyNanotechnology-enabled coatings for automotive and defence sectorsteam of 25YC S14ActiveOther	Other	Active	YCS14
Per VicesBuilding Mission Critical Software Defined Radio products.team of 11YC W12ActiveOther	Other	Active	YCW12

YC Defense

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