Companies
232 companies match. Sources: YC directory, Techstars portfolio, a16z speedrun.
| Company | Cluster | Niche | Batch | AI |
|---|---|---|---|---|
| Earendil Robotics Drone swarm defence at a small-unit level | Defense and space | counter-drone swarm systems | YC S26 | |
| Exosat Building a sovereign Starlink | Defense and space | sovereign satellite constellation | YC S26 | |
| Greypoint Industries Building drone swarms that hunt drone operators | Defense and space | autonomous drone swarm warfare | YC S26 | AI-native |
| GUILD Making aerospace parts faster and cheaper for defense | Defense and space | AI-automated aerospace manufacturing for defense | YC S26 | AI-native |
| Hop Aero Rocket cargo delivery to contested environments | Defense and space | hypersonic rocket cargo delivery | YC S26 | |
| IMPACT Drones Air Defense as a Service for Civilian Infrastructure. | Defense and space | autonomous air defense drones | YC S26 | AI-native |
| Isengard Industries Inc Mass-produced AI strike systems and Counter-UAS | Defense and space | autonomous strike and counter-UAS systems | YC S26 | AI-native |
| Mass Magnetics USA-made magnetics for aerospace, robotics, and defense. | Defense and space | Domestic rare-earth magnets for defense | YC S26 | |
| Vernius Systems, Inc. Autonomous radar guidance for interceptors | Defense and space | autonomous radar guidance systems | YC S26 | |
| 9 Mothers Counter Drone Systems. $1.6m sales. We delivered for the DoW. | Defense and space | autonomous counter-drone systems | YC X26 | |
| AICE Submarine drones for defense | Defense and space | Autonomous underwater defense drones | YC X26 | |
| Arlo Industries Track drones and missiles without radars - Accurate, Passive, Scalable | Defense and space | passive drone and missile tracking network | YC X26 | |
| Dispatch Satellites for Manufacturing in Space | Defense and space | reusable space logistics for manufacturing | YC X26 | |
| General Aviation Fix ATC by connecting aircraft to the internet | Defense and space | aviation communication infrastructure | YC X26 | |
| Maquoketa Research The intelligence layer for drones | Defense and space | drone intelligence software | YC X26 | AI-native |
| Nine Fives RF test equipment for next-gen spacecraft, drones, and cellphones | Defense and space | RF test equipment for aerospace and telecom | YC X26 | |
| Ornadyne We're building robot birds for surveillance. | Defense and space | biomimetic surveillance drones | YC X26 | |
| Surtr Defense Systems The hardware-agnostic operating system for drone defense | Defense and space | Counter-UAS OS and threat fusion | YC X26 | |
| Tenet Industries Low-cost, mass-producible defense systems | Defense and space | mass-producible attack drones | YC X26 | |
| Beyond Reach Labs Space solar arrays that grow to the size of a football field in orbit | Defense and space | Space solar power generation | YC W26 | |
| Constellation Space AI operating system for mega-scale satellite networks. | Defense and space | satellite network orchestration | YC W26 | AI-native |
| Galactic Resource Utilization Space, Inc. (GRU Space) Moon Hotel -> The Intergalactic Construction Company of Earth | Defense and space | lunar infrastructure and construction | YC W26 | |
| Milliray Technology to detect and track small drones | Defense and space | drone detection radar systems | YC W26 | |
| Seeing Systems Modular AI-Commanded Drones for Defence | Defense and space | AI-commanded autonomous strike drones | YC W26 | AI-native |
| Systellar Space Systellar Space | Defense and space | Space defense and monitoring | TS 2026 | AI-native |
| Icarus Stratospheric birds for defense | Defense and space | autonomous stratospheric surveillance aircraft | YC F25 | |
| Lakonia Delivering AI-powered situational awareness in tactical environments. | Defense and space | AI command and control for tactical ops | YC F25 | AI-native |
| Null Labs End-to-end Simulation for Defense Autonomy | Defense and space | autonomous systems simulation | YC F25 | |
| Wardstone The Modular Interceptor Platform | Defense and space | Low-cost modular air defense interceptors | YC F25 | |
| Zephyr Fusion Powering tomorrow's industrial revolution in space | Defense and space | in-orbit fusion power for space industry | YC F25 | |
| Albacore Inc. Drone submarines | Defense and space | autonomous underwater drone systems | YC S25 | |
| Perseus Defense America's Golden Dome for Drones | Defense and space | counter-UAS defense systems | YC S25 | |
| Morph Systems Developer of proprietary middleware enables Korean military and defense firms to integrate seamlessly with Palantir platforms without compromising technological sovereignty or domestic system control. | Defense and space | Palantir integration middleware for Korean defense | - | |
| Cascade Space Commercial alternative to the Deep Space Network | Defense and space | Commercial deep space ground stations | YC X25 | |
| Enhanced Radar AI for air traffic control | Defense and space | AI air traffic control systems | YC W25 | AI-native |
| Instinct Space Building lunar landers | Defense and space | lunar lander hardware | YC W25 | |
| Orbital Operations High Thrust Space Vehicles for Satellite Defense | Defense and space | satellite defense vehicles | YC W25 | |
| Reditus Space Reusable Satellites | Defense and space | Reusable orbital platforms | YC W25 | |
| Splash Inc. Autonomous patrol-boats for National Security | Defense and space | autonomous patrol vessels for national security | YC W25 | |
| ANT61 ANT61 Beacon | Defense and space | Autonomous robotics for space operations | TS 2025 | |
| Avionova | Defense and space | aerospace biotech integration | TS 2025 | |
| Azora | Defense and space | space infrastructure technology | TS 2025 | |
| CISGAM CISGAM | Autonomous Space Systems | Defense and space | Space technology | TS 2025 | |
| FibrX | Defense and space | AI-powered cybersecurity for critical infrastructure | TS 2025 | AI-native |
| ORBES | Defense and space | autonomous aerial defense systems | TS 2025 | |
| Origami Space Development Origami Space | Defense and space | satellite data infrastructure | TS 2025 | |
| Plexus | Defense and space | space technology platform | TS 2025 | |
| Apolink 24/7 satellite connectivity in low Earth orbit | Defense and space | satellite connectivity infrastructure | YC F24 | |
| Ares Industries Building low-cost cruise missiles | Defense and space | cruise missile manufacturing | YC S24 | |
| Guardian RF Drone detection for US defense and national security | Defense and space | drone detection and counter-UAS | YC S24 | |
| Theseus GPS Denied Navigation for Drones | Defense and space | GPS-denied drone navigation | YC S24 | |
| Usul AI Platform for Winning Defense & Government Contracts | Defense and space | AI contract matching for government | YC S24 | AI-native |
| Basalt Constellations as a Service | Defense and space | AI-controlled satellite constellations | YC W24 | AI-native |
| Deepnight Building The Next Generation of Night Vision Devices | Defense and space | AI-enhanced night vision devices | YC W24 | AI-native |
| EdgeTrace Describe It. Find It. Act On It. | Defense and space | AI-powered video intelligence for public safety | YC W24 | AI-native |
| Elodin Unified flight software and hardware for the mission of tomorrow | Defense and space | Flight software and hardware for drones and satellites | YC W24 | |
| AirSafe.AI AirSafe.ai DAA (Detect-And-Avoid) - Unlock Unlimited Range & BVLOS Drone Operations | Defense and space | drone counter-measures and ISR | TS 2024 | AI-native |
| Aptos Orbital | Defense and space | AI-powered satellite operations | TS 2024 | AI-native |
| ATRX | Defense and space | space technology | TS 2024 | |
| Catalyx Space | Defense and space | space technology and infrastructure | TS 2024 | |
| ColliMate Space Collimate Space - Redefining How Data Moves Through Space | Defense and space | space tech operations platform | TS 2024 | |
| Enigma Aerospace Enigma Aero: Unrestricted Airpower | Enigma | Defense and space | AI-powered aerospace robotics | TS 2024 | AI-native |
| Mithril Technologies Mithril Technologies — Adaptive Antennas for the Next Generation of Space Radar | Defense and space | Space technology and infrastructure | TS 2024 | |
| Nimbus Aerospace Nimbus Aerospace – Making private air travel sustainable | Defense and space | Aerospace and drone technology | TS 2024 | |
| Orbital Arc Orbital Arc — Home | Defense and space | space manufacturing and infrastructure | TS 2024 | |
| Pramatra Space Pramatra Space | Quantum Key Distribution | Defense and space | Space tech cybersecurity IoT | TS 2024 | |
| Pulse Space Pulse - Space Power Solutions | Defense and space | space technology platform | TS 2024 | |
| re:ORBITAL reOrbital | Defense and space | satellite operations and analytics | TS 2024 | |
| Samara Aerospace | Defense and space | aerospace and space technology | TS 2024 | |
| SkySERVE SkyServe | Edge Computing & AI Onboard Satellites | Defense and space | AI for satellite operations | TS 2024 | AI-native |
| Soleil Space Soleil Space | Defense and space | satellite communications and ISR | TS 2024 | |
| Spacebackend Spacebackend | Defense and space | Space tech infrastructure platform | TS 2024 | |
| Spiral Blue | Defense and space | Space technology platform | TS 2024 | |
| Translunar Exports and Servicing Incorporated Stellerian | Defense and space | space robotics and servicing | TS 2024 | |
| Ultraview AI Ultraview AI — Autonomous Aircraft Inspection Platform | Defense and space | AI for defense and space | TS 2024 | AI-native |
| VXB Aerospace | Defense and space | 3D printing for aerospace components | TS 2024 | |
| Singularity Building and Protecting an Exciting Future | Defense and space | counter-weapon defense systems | YC S23 | |
| Radical Building persistent, high-performance infrastructure in the sky | Defense and space | High-altitude autonomous platforms | YC W23 | |
| Celestial Space Technologies – Be inspired… | Defense and space | Space technology and satellite systems | TS 2023 | |
| ELAB4 Space Home - ELAB4Space | Defense and space | Space technology infrastructure | TS 2023 | |
| EnkiAI Commercial Intelligence for Emerging Technologies and Critical Infrastructure | Enki AI | Defense and space | Critical infrastructure intelligence for emerging tech | TS 2023 | AI-native |
| Esper Satellite Imagery Esper | Hyperspectral Satellite Imagery for Critical Mineral Exploration | Defense and space | hyperspectral satellite imagery for mineral exploration | TS 2023 | |
| GATE Space GATE Space | Redefining space mobility | Defense and space | satellite propulsion systems | TS 2023 | |
| Imetalx Group iMetalx Space Systems | Defense and space | Space systems for military and commercial | TS 2023 | |
| Kurs | Defense and space | orbital infrastructure and operations | TS 2023 | |
| Magma Space Magma Space — Ultra-Stable, Agile & Autonomous Satellite Control | Defense and space | autonomous satellite control systems | TS 2023 | |
| Magnestar Magnestar Inc. | Defense and space | satellite connectivity and asset protection | TS 2023 | |
| MobilityZ Health Humans In Space | Defense and space | human spaceflight health monitoring | TS 2023 | |
| Moya Aero Index of / | Defense and space | drone intelligence and indexing | TS 2023 | |
| O Analytics O ANALYTICS | Defense and space | space tech analytics | TS 2023 | |
| PierSight Space PierSight — Persistent SAR Surveillance for Maritime & Defense | Defense and space | Maritime SAR surveillance systems | TS 2023 | |
| Promin Aerospace Promin Aerospace | Defense and space | Space access and democratization | TS 2023 | |
| Remos Software-Defined Satellite Ground Stations | Remos Space Systems AB | Defense and space | satellite ground station software | TS 2023 | |
| Smart Border Systems Smart Border Systems | Defense and space | border security infrastructure | TS 2023 | |
| Washington’s Hammer Washington's Hammer Website | Defense and space | Navy defense tech platform | TS 2023 | |
| Array Labs We're building satellites to create a real-time 3D map of the world. | Defense and space | satellite imaging and earth observation | YC S22 | |
| Quindar Datadog for Space | Defense and space | satellite constellation management SaaS | YC S22 | |
| Velontra Hypersonic space plane that can take-off from any location and weather | Defense and space | hypersonic space launch vehicles | YC S22 | |
| AstroForge We Mine Asteroids | Defense and space | asteroid mining and space resources | YC W22 | |
| Hubble Network Bluetooth to Space | Defense and space | satellite connectivity infrastructure | YC W22 |
Showing first 100; narrow the filters to see the rest.