Castelion
Castelion designs, tests, and manufactures next-generation military systems rapidly and at massive scale to deter future wars.
About
Castelion is a private aerospace and defense company specializing in the rapid development, scalable manufacturing, and deployment of hypersonic strike systems. The company focuses on building affordable, high-performance hypersonic strike systems to strengthen national security and outpace evolving threats. Castelion leverages vertical integration, hardware-rich development, and high-cadence iterative testing to reduce the cost and timeline for bringing advanced military systems to operational readiness. Teams look it up for Defense Tech, Aerospace, Hypersonic Technology.
Frequently asked
What does Castelion do?
Castelion is a Defense Tech company that offers Hardware. Teams look it up for Aerospace, Hypersonic Technology, Military Systems. It is based in Torrance, United States and was founded in 2022. Compare it on funding, headcount, reviews and nearby alternatives rather than the marketing line alone.
What is Castelion's Effective Domain Rating?
StartupHub's Effective Domain Rating for Castelion is 76 out of 100, measuring real cross-surface visibility in search engines and AI answers rather than claimed link authority. That is underrated against its Ahrefs Domain Rating of 43, meaning it surfaces in search and AI results more than its claimed authority alone would suggest.
Is Castelion trustworthy and reputable?
StartupHub's Data Trust & Reputation score for Castelion is 52 out of 100, based on site security posture and privacy practices.
Where is Castelion headquartered?
Castelion is headquartered in Torrance, United States.
When was Castelion founded?
Castelion was founded in 2022.
What industry does Castelion operate in?
Castelion operates in Defense Tech, Aerospace, Hypersonic Technology, Military Systems, Advanced Manufacturing.
Strength of the site’s backlink profile, on Ahrefs’ 0-100 Domain Rating scale. Licensed third-party data, not our opinion.
Our own read on real cross-surface visibility rather than raw backlink authority. A site can carry a high Domain Rating and still be invisible where people actually look, which is what this measures.
How well an AI agent can read and use this site: structured data, clean markup, and whether key facts are reachable without running JavaScript. We scan the live site.
Google PageSpeed mobile performance for the company’s own site. Measured by Google, not by us.
“What do you guys think about Castelion? I recently got a job offer after only 1 interview.. So from my basic understanding it's a new startup with newly granted military contracts so they're on a growth spurt at the moment. What do you guys…”
View on Reddit“What do you guys think about Castelion? I recently got a job offer after only 1 interview.. So from my basic understanding it's a new startup with newly granted military contracts so they're on a growth spurt at the moment. What do you guys…”
View on Reddit“Hypersonic weapon startup Castelion wins $105 million Navy contract for F/A-18 integration. Is the US Navy jumping the gun in pursuing carrier based hypersonics while there's still no tried and true defences against land based, antiship hyp…”
View on Reddit“Castelion (Hypersonic Missile Factory). This post aims to provide a clearer explanation regarding the proposed Castelion missile manufacturing facility, which may have been confusing in an earlier communication. The Project: Castelion plans…”
View on Reddit“Castelion Town Hall at Mariposa. So, I went to the Mariposa community center for the Castelion forum. It got a little heated at times. But this is one thing no body is talking about. The job numbers. It started at 1,000 employees. Now recen…”
View on RedditSome comments are pulled from public discussions around the web (look for the source icon). Quotes are excerpts; click through to read the full thread.