Velontra
Velontra is building a hypersonic space plane that can takeoff from anywhere in any weather. This horizontal takeoff increases launch reliability and enables customers to directly access any orbit. Our air-breathing propulsion system is up to 6 times more fuel efficient than any rocket, and uses oxygen from the air which creates thousands of pounds of additional payload capacity. We have millions in current government/commercial contracts and LOI’s. We have assembled a team of industry experts,
Y Combinator
yc-company-directory #2238Velontra is building a hypersonic space plane that can takeoff from anywhere in any weather. This horizontal takeoff increases launch reliability and enables customers to directly access any orbit. Our air-breathing propulsion system is up to 6 times more fuel efficient than any rocket, and uses oxygen from the air which creates thousands of pounds of additional payload capacity. We have millions in current government/commercial contracts and LOI’s. We have assembled a team of industry experts,
sourceVelontra is classified as AI infrastructure from source descriptions and fund-directory context. Similar companies below are ranked from offline product facets and meaningful description overlap; category and source affiliation can only strengthen an existing product match. For lookup-created rows, the profile starts as pending enrichment until deeper source collection runs.
Local clusters rerank extracted product concepts and description terms. The generated graph remains the fallback for sparse descriptions: offline reciprocal product-similarity graph: extracted concepts + description terms + bounded category/affiliation boosts. Minimum fallback score: 0; max competitors: 6.
Companies similar to Velontra
A deterministic local cluster built from offline product facets and meaningful description terms. Category and selected-institution affiliation provide bounded tie-breaks. Open any peer to continue exploring its cluster.
Astranis
match 72Astranis builds advanced satellites for high orbits, expanding humanity’s reach into the solar system. Today Astranis satellites provide dedicated, secure networks to highly-sophisticated customers across the globe— large enterprises, sovereign governments, and the US military. With five satellites on orbit and many more set to launch soon, the company is servicing a backlog of more than $1 billion of commercial contracts. Astranis is the preferred satellite communications partner for buyers wit
shared extracted concept terms: customer; shared product terms: orbit, system, customer, government; shared product theme: sales and marketing; shared affiliation: Y Combinator
Alba Orbital
match 72Alba Orbital is building the world's largest earth observation constellation, imaging everywhere on earth, every 15 minutes. We can see events within minutes such as wildfires in real time and have signed >$85m of LOIs, with both government and commercial customers paying pre-orders for imagery. To date we have launched 62 satellites into orbit (more than any all other yc companies combined), with more launching in 2026 onwards. We have launched a number of technology demonstration imaging satel
shared extracted concept terms: customer; shared product terms: time, government, commercial, customer; shared product theme: sales and marketing; shared affiliation: Y Combinator
Exosonic, Inc.
match 69Exosonic is an early-stage aerospace start-up based in Los Angeles, CA developing supersonic adversary air UAVs to support the adversary air training mission for both commercial and government customers. The goal is to mature these supersonic UAVs to become loyal wingmen (or collaborative combat aircraft) and eventually develop quiet supersonic airliners from the lessons learned and profits generated by the supersonic UAV product line. Founded in 2019, Exosonic has raised $4.5M+ in private capit
shared extracted concept terms: customer, air; shared product terms: up, air, commercial, government; shared product theme: sales and marketing; same category: AI infrastructure; shared affiliation: Y Combinator
Spaceium Inc
match 57Spaceium builds fully automated space stations to refuel and repair spacecraft. We have secured $86.1 million in binding commercial contracts and have an additional $230 million in the pipeline. Additionally, we have 1 billion dollars in letters of intent. We have successfully tested our hardware, which will launch to space next year. Our fully automated space stations will efficiently store and transfer both cryogenic (extremely cold) and non-cryogenic fuels with zero loss during storage and tr
shared product terms: space, million, commercial, contract; shared affiliation: Y Combinator
Reebeez
match 49Reebeez develops efficient solid-state thermoelectrophotovoltaic microengines for UAVs that achieve flight times and payloads unrivaled by batteries and fuel cells. Due to weight limitations of engines, small aerial vehicles must rely on lithium polymer batteries that result in disappointing flight times and payloads. Reebeez presents a propulsion system powered by thermoelectrophotovoltaics (TEPV) that runs on lightweight combustible fuels to attain specific energy eight times better than lith
shared product terms: efficient, time, payload, fuel; shared affiliation: Y Combinator
ATRX
match 40Building the Space Plane Ferry of Choice. It's a horizontal launch space plane that can take off and land on any runway
shared product terms: space, plane, horizontal, launch