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Company pair · Aerospace & Defense

Astranis vs Sierra Space: Valuation, Funding, Trajectory

Aerospace & Defense Both private US-headquartered No Canborsa market

Astranis vs Sierra Space: two of the better-known names in aerospace-defense, compared side by side.

On this pageSide by side Valuation marks What each discloses Verdict FAQ

AstranisPRIVATE · US

Sierra SpacePRIVATE · US

Last valuation$2.8B$8B

Basis Post-money Post-money

As ofMay 2026Mar 2026

Founded20152021

Employees≈250≈2,000

On CanborsaNo marketNo market

Head-to-head · field by field

Astranis vs Sierra Space — side by side

Field

AstranisPRIVATE · FOUNDED 2015

Sierra SpacePRIVATE · FOUNDED 2021

Last valuation

$2.8B Post-money

$8B Post-money

Valuation date

6 May 2026

1 Mar 2026

Valuation basis

Post-money

Latest round

Series E

Series C

Round size

$450M

$550M

Round lead

Snowpoint Ventures, Franklin Templeton

LuminArx Capital Management

Named investors

Andreessen Horowitz BlackRock Venrock

LuminArx Capital Management General Atlantic Coatue Moore Strategic Ventures

Founded

2015

2021

Employees (est.)

≈250

≈2,000

Sector & HQ

Space technology (small geostationary communications satellites) · 🇺🇸 US

Aerospace / commercial spaceflight and defence · 🇺🇸 US

Status & market

Private — no Canborsa market

Valuation · both companies on one scale

Valuation marks

Each bar is the last disclosed mark — $2.8B for Astranis (post-money, May 2026) and $8B for Sierra Space (post-money, Mar 2026).

Astranis

$2.8BPost-money · May 2026

Sierra Space

$8BPost-money · Mar 2026

ASTRANIS · $2.8B · MAY 2026SIERRA SPACE · $8B · MAR 2026

Astranis vs Sierra Space · what each company discloses

What each company discloses, and what it leaves out

AstranisPRIVATEAerospace & Defense · US · 2015

+Last disclosed mark $2.8B — post-money, May 2026.

+Founded 2015 .

+≈250 employees.

+Latest round: Series E, $450M raised, led by Snowpoint Ventures.

Sierra SpacePRIVATEAerospace & Defense · US · 2021

+Last disclosed mark $8B — post-money, Mar 2026.

+Founded 2021 .

+≈2,000 employees.

+Latest round: Series C, $550M raised, led by LuminArx Capital Management.

Verdict

Verdict

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:$450M, led by Snowpoint Ventures in May 2026.

A dated print: it moves only when a newer round is announced.

The $8B tells you…

What an investor paid for newly issued shares — a primary round, priced post-money.

How much capital arrived with it:$550M, led by LuminArx Capital Management in Mar 2026.

A dated print: it moves only when a newer round is announced.

Both marks are post-money, so 2.86× compares like with like. Both are private: there is no public quote and no Canborsa market on either name.

Frequently asked questions

What industries are Astranis and Sierra Space in?›

Astranis operates in Space technology (small geostationary communications satellites), and Sierra Space operates in Aerospace / commercial spaceflight and defence.

Which is worth more, Astranis or Sierra Space?›

Astranis was last valued at $2.8B in May 2026, and Sierra Space at $8B in March 2026.

What's the latest round for Astranis compared to Sierra Space?›

Astranis raised $450M through its Series E round in May 2026, while Sierra Space raised $550M through its Series C round in March 2026.

Where are Astranis and Sierra Space based?›

Astranis' headquarters is in San Francisco, California; Sierra Space's is in Louisville, Colorado.

What's the team size at Astranis versus Sierra Space?›

Astranis employs around 250 people; Sierra Space employs around 2,000.