Aviation and Space Startups funded by Y Combinator (YC) in Los Angeles 2024

Odys Aviation (formerly Craft Aero) builds vertical take-off and landing aircraft for major airlines. We cut travel time in half on the world’s busiest routes by using city helipads and local airports. The company founders are electric propulsion and automotive manufacturing experts who have spent their careers electrifying transportation systems at Virgin Hyperloop, GoogleX, Volvo, and Fisker Automotive. We’ve won two USAF Agility Prime contracts, have pre-orders and options for more than 1,000 aircraft.

Relativity is building humanity’s multiplanetary future. We invented a new approach to design, build, and fly our own rockets, starting with Terran 1 – the world’s first entirely 3D printed rocket, and Terran R, our next generation medium-heavy lift fully reusable launch vehicle. As a vertically integrated technology platform, Relativity is at the forefront of an inevitable shift toward software-defined manufacturing. By fusing 3D printing, artificial intelligence, and autonomous robotics, we are pioneering the factory of the future. Disrupting 60 years of aerospace, Relativity offers a radically simplified supply chain, building a rocket with 100x fewer parts in less than 60 days. We believe in a future where interplanetary life fundamentally expands the possibilities for human experience. Our long-term vision is to upgrade humanity’s industrial base on Earth and on Mars.

Seaflight Technologies has developed a new form of Aerodynamic Flow Control for electrified aircraft that increases range and payload by 30%. That's the same performance improvement you'd get from hopping in a DeLorean to 2035 and coming back with batteries from the future. But it's available today - our tech has been derisked by testing supported by the National Science Foundation, the US Air Force, and the Australian Government. Our first product is a simple fixed-wing large cargo drone that is efficient enough to remove the "green penalty" currently associated with electric aviation. That's a step change from today's conventional platforms. First generation electric aircraft are heavy, expensive, complicated, and limited in terms of range and payload. In the entire history of aviation, that's never been a winning formula. When everyone already has access to the same batteries, materials, and motors, what really makes the difference? The answer is revolutionary aerodynamics, but in a form factor that suits today's operations and manufacturing. Beyond our own drone product line, we have partners across Aerospace helping incorporate our tech into their products. In the future, if you want to have the most efficient and cost-effective flying machine of any description, you'll need Seaflight's Flow Control inside.

Prime Lightworks Inc. manufactures electric propulsion systems for space satellites.Their goal is to engineer new possibilities in space while drastically reducing cost and waste.

With five issued patents covering our core business lines, and more than a dozen additional patents pending this year and more than $5M in revenue, TransAstra is developing the technologies that will drive the rapidly expanding space economy. Our breakthrough Omnivore propulsion system can propel spacecraft, including our Worker Bee commercial OTV with water or virtually any other fluid as a propellant using only concentrated sunlight as a power source. Omnivore is faster, cheaper, and more practical than electric propulsion while being substantially less expensive, safer, and more operationally flexible than legacy chemical propulsion systems. Our Sutter Telescope System can identify and locate resource-rich asteroids and orbital debris that existing technologies can’t find and works synergistically with our Worker Bee OTV for orbital logistics. For government customers, Sutter can identify dark fast-moving objects between Earth and the Moon which currently evade detection, a critical issue for national defense and a key need of the Space Force. We are already using Sutter in ground-based observatories and will begin commercial sales of Sutter SDA data next month having tracked dozens of faint moving objects in space already. Once launched into space, Sutter will be 300,000 times more cost effective than any other known telescope design and will revolutionize sense making in space.

Our focus is on developing the smallest, fastest heavy lift optionally piloted VTOL aircraft. Our aircraft can be operated in urban environments with no risk of rotor strikes - we don't use rotor systems! Ship anything from downtown LA to downtown San Diego in 20 mins!

Turion Space is building spacecraft to move things around in space and image space objects when they’re not, and focused on developing the dual-use technology required to ensure a sustainable future in space. They aim to build a strong foundation selling space domain awareness imagery data while advancing their technology towards an affordable solution for orbital debris removal and eventually asteroid mining. The founding team originates from SpaceX, and after going through the Y-combinator accelerator in summer 2021 went on to raise a $6.2M seed round and is launching their first DROID satellite in early 2023.

Talyn is making long-range electric vertical take-off and landing (eVTOL) aircraft for cargo. We get fixed-wing performance with VTOL capability by making an electric fixed wing aircraft that is caught mid-air with a custom winged drone, enabling it to take-off and land vertically.