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CASTELION
Castelion
Aerospace & Defense · Torrance, California · United States · Founded · 2022 · ≈ · 225 · employees

Castelion competitors

Private

Castelion has 6 close competitors: Astranis, Allen Control Systems, Axiom Space.

ProfileValuationFundingCompetitorsStock & IPOHow to invest
Peer set

Who competes with Castelion

Sector, valuation and status for each competitor.

company profileCastelion›
$2.8Bpost-money
Founded 2022United States
competitorAstranis›
$2.8Bas of May 2026
Founded 2015Private
competitorAllen Control Systems›
$2.2Bas of May 2026
Founded 2018Private
competitorAxiom Space›
$2.5Bas of Feb 2026
Founded 2016Private
competitorBoom Technology›
$1.5Bas of Dec 2025
Founded 2014Private
competitorRelativity Space›
$4.2Blatest valuation
Founded 2015Private
competitorSierra Space›
$8Bas of Mar 2026
Founded 2021Private
Head-to-head

Castelion and its peers, side by side

A private valuation and a public market cap share one column; each row names its basis and date.

Company
Sector
Founded
Valuation / market cap
Status
HQ
On Canborsa
Castelion
Aerospace & Defense
2022
$2.8Bpost-money
PRIVATE
United States
Company profile
Astranis
Space technology (small geostationary communications satellites)
2015
$2.8Bpost-money · May 2026
PRIVATE
United States
Company profile
ACAllen Control Systems
Defense Technology
2018
$2.2BMay 2026
PRIVATE
United States
Company profile
Axiom Space
Commercial spaceflight / space infrastructure
2016
$2.5BFeb 2026
PRIVATE
United States
Company profile
Boom Technology
Aerospace & Defense
2014
$1.5Bpost-money · Dec 2025
PRIVATE
United States
Company profile
Relativity Space
Aerospace manufacturing / commercial spaceflight
2015
$4.2B
PRIVATE
United States
Company profile
Sierra Space
Aerospace / commercial spaceflight and defence
2021
$8Bpost-money · Mar 2026
PRIVATE
United States
Company profile
Context · reading the peer set

Where Castelion meets its rivals

What Castelion sells, and where the rivals meet it

Hypersonic defense equipment manufacturer

Castelion competes with 6 companies here: Astranis, Allen Control Systems, Axiom Space, Boom Technology, Relativity Space, Sierra Space.

A private valuation and a public price

Castelion was last valued at $2.8B (post-money). That price was agreed in one transaction and holds until the next round. A listed competitor is repriced every trading session.

Castelion on Canborsa
MarketClosest: SPCX-PERP
Fees0.07% per side · 0.14% round-trip
Fundingevery 1h

Castelion competitors — frequently asked questions

Who are Castelion's competitors?›

The closest aerospace & defense peers are on the competitors page.

How can I get exposure to Castelion?›

The routes section explains what is realistically available for a company at this stage.

Is Castelion publicly traded?›

No. Castelion is a private company; its shares do not trade on a public exchange.

What is Castelion's valuation?›

The last valuation is $2.8B.

Who has invested in Castelion?›

Lead investors for each round are in the funding timeline.

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