Momentus
Momentus is a space infrastructure services company. As a first mover, Momentus will offer the most basic, foundational services that enable businesses to flourish in space. With their experienced team of aerospace, propulsion, and robotics engineers, Momentus makes and operates cost-effective and energy-efficient in-space transport and service vehicles that utilize water plasma propulsion technology. Momentus has service agreements in place with numerous private satellite companies, government
Y Combinator
yc-company-directory #1313Momentus is a space infrastructure services company. As a first mover, Momentus will offer the most basic, foundational services that enable businesses to flourish in space. With their experienced team of aerospace, propulsion, and robotics engineers, Momentus makes and operates cost-effective and energy-efficient in-space transport and service vehicles that utilize water plasma propulsion technology. Momentus has service agreements in place with numerous private satellite companies, government
sourceMomentus is classified as Developer tools 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 Momentus
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.
Tesseract
match 69Tesseract is a provider of cost effective propulsion components and systems for in-space applications spanning commercial Earth-orbiting satellites, robotic exploration missions, and human spaceflight.
shared extracted concept terms: propulsion, satellite; shared product terms: space, propulsion, robotic, cost; shared affiliation: Y Combinator
Orbital Operations
match 69Orbital Operations is developing a high thrust, reusable space vehicle for satellite defense. We protect critical satellites, like GPS and Military communication satellites, from adversarial threats, like China and Russia. Our vehicle will use the exact same propulsion systems that launch vehicles have used for decades by implementing a cryogenic management system. This will give us over 100x the thrust or current in-space propulsion. Ross and I have over 15 years of combined aerospace experienc
shared extracted concept terms: propulsion, satellite; shared product terms: space, experienc, aerospace, propulsion; shared affiliation: Y Combinator
Byteport
match 68Founded in 2025, Byteport is a technology company that builds mission-critical network infrastructure for robotics, satellite, AI, and enterprise applications all over the world. Businesses of every size—from new startups to public companies—use our software to accelerate file transfer online.
shared extracted concepts: businesses; shared product terms: infrastructure, robotic, satellite, businesse; shared product theme: developer infrastructure; shared affiliation: Y Combinator
Postal
match 67Postal offers a modern virtual mailbox for businesses. Postal provides an official address for government, IRS, and vendor communications so companies don't have to use an apartment / shared office address. Postal's AI summarizes mail and recommends compliance actions, and its marketplace of service providers are ready to perform the mundane compliance work that otherwise falls through the cracks. Companies get 6 months free (a $300 value), plus three free hours of compliance services (a $600 va
shared extracted concepts: businesses, government; shared product terms: offer, businesse, companie, government; shared affiliation: Y Combinator
Care Weather
match 66Care Weather collects the highest-accuracy global weather data to help governments and shipping companies adapt to extreme weather. The data is collected by Care Weather’s unique flat-panel radar satellite, which is 1000X more cost effective because it’s vertically integrated, gets more solar power, and sails on top of the atmosphere for a closer view of the surface. Our team includes CEO Patrick Walton (NASA Earth science fellow) and CTO Alex Laraway (mach 4 rockets). In the last 4 months, we b
shared extracted concept terms: companie, government; shared product terms: government, companie, satellite, cost; shared product theme: climate and energy; shared affiliation: Y Combinator
Elio.Earth
match 52Elio enables analysts in companies & governments to respond to climate change's dynamism and rapidly act on climate solutions with confidence, by putting leading scientific data into context.
shared extracted concept terms: companie, government; shared product terms: enable, companie, government; shared product theme: climate and energy; same category: Developer tools