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Company pair · Aerospace & Defense
VS

Axiom Space vs Castelion

Aerospace & Defense Both private US-headquartered No Canborsa market

This comparison puts Axiom Space next to Castelion within aerospace-defense on size, funding and trajectory.

On this pageSide by sideValuation marksWhat each disclosesVerdictFAQ
Axiom SpacePRIVATE · US
CastelionPRIVATE · US
VS
Last valuation$2.5B$2.8B
Basis Post-money Post-money
Founded20162022
Employees≈790≈225
On CanborsaNo marketNo market
At a glance
$2.5B
Axiom SpacePost-money, Series D · Feb 2026
$2.8B
CastelionPost-money, Series B
1.12×
GapBoth post-money
0 of 2
On CanborsaNeither company has a market
VS
Head-to-head · field by field

Axiom Space vs Castelion — side by side

Field
Axiom SpacePRIVATE · FOUNDED 2016
CastelionPRIVATE · FOUNDED 2022
VS
Last valuation
$2.5B Post-money
$2.8B Post-money
Valuation basis
Post-money
Post-money
Latest round
Series D
Series B
Round size
$350M
$350M
Named investors
Aljazira Capital Boryung 4iG Group
Lightspeed Venture Partners Andreessen Horowitz Altimeter Capital
Founded
2016
2022
Employees (est.)
≈790
≈225
Sector & HQ
Commercial spaceflight / space infrastructure · 🇺🇸 US
Aerospace & Defense · 🇺🇸 US
Status & market
Private — no Canborsa market
Private — no Canborsa market
Valuation · both companies on one scale

Valuation marks

Each bar is the last disclosed mark — $2.5B for Axiom Space (post-money, Feb 2026) and $2.8B for Castelion (post-money).

Axiom Space
$2.5BPost-money · Feb 2026
Castelion
$2.8BPost-money · undated
AXIOM SPACE · $2.5B · FEB 2026CASTELION · $2.8B · UNDATED
Axiom Space vs Castelion · what each company discloses

What each company discloses, and what it leaves out

Axiom SpacePRIVATEAerospace & Defense · US · 2016
+Last disclosed mark $2.5B — post-money, Feb 2026.
+Founded 2016 .
+≈790 employees.
+Latest round: Series D, $350M raised, led by Type One Ventures.
CastelionPRIVATEAerospace & Defense · US · 2022
+Last disclosed mark $2.8B — post-money.
+Founded 2022 .
+≈225 employees.
+Latest round: Series B, $350M raised.
+
Verdict

Verdict

The $2.5B tells you…
What an investor paid for newly issued shares — a primary round, priced post-money.
How much capital arrived with it:$350M, led by Type One Ventures in Feb 2026.
A dated print: it moves only when a newer round is announced.
The $2.8B tells you…
What an investor paid for newly issued shares — a primary round, priced post-money.
How much capital arrived with it:$350M.
A dated print: it moves only when a newer round is announced.

Both marks are post-money, so 1.12× compares like with like. Both are private: there is no public quote and no Canborsa market on either name.

Frequently asked questions

What sector is Axiom Space in compared to Castelion?›

Axiom Space's sector is Commercial spaceflight / space infrastructure; Castelion's sector is Aerospace & Defense.

What is Axiom Space's valuation versus Castelion's?›

Axiom Space is valued at $2.5B, and Castelion at $2.8B.

Which investors backed Axiom Space and Castelion?›

Type One Ventures and Qatar Investment Authority led the round for Axiom Space; JPMorganChase Strategic Investment Group and Andreessen Horowitz led for Castelion.

Is Axiom Space from the same country as Castelion?›

Axiom Space is based in United States; Castelion is based in United States.

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