Home/Companies/Boom Technology vs Relativity Space

Company pair · Aerospace & Defense

Boom Technology vs Relativity Space: Valuation, Funding, Trajectory

Aerospace & Defense Both private US-headquartered No Canborsa market

Boom Technology and Relativity Space are often weighed against each other in aerospace-defense.

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

Boom TechnologyPRIVATE · US

Relativity SpacePRIVATE · US

Last valuation$1.5B$4.2B

Basis Post-money Basis undisclosed

As ofDec 2025Jun 2021

Founded20142015

Employees≈25≈2,000

On CanborsaNo marketNo market

At a glance

$1.5B

Boom TechnologyPost-money, Funding Round (same entity as Boom Supersonic) · Dec 2025

$4.2B

Relativity SpaceSeries E · Jun 2021

A valuation basis is undisclosed — no ratio is scored

Gap

0 of 2

On CanborsaNeither company has a market

Head-to-head · field by field

Boom Technology vs Relativity Space — side by side

Field

Boom TechnologyPRIVATE · FOUNDED 2014

Relativity SpacePRIVATE · FOUNDED 2015

Last valuation

$1.5B Post-money

$4.2B Basis undisclosed

Valuation date

9 Dec 2025

8 Jun 2021

Latest round

Funding Round (same entity as Boom Supersonic)

Series E

Round size

$300M

$650M

Round lead

Darsana Capital Partners, Altimeter Capital

Fidelity Investments

Named investors

ARK Invest Bessemer Venture Partners Darsana Capital Partners Robinhood Ventures

Fidelity Investments Baillie Gifford BlackRock BOND

Founded

2014

2015

Employees (est.)

≈25

≈2,000

Sector & HQ

Aerospace & Defense · US

Aerospace manufacturing / commercial spaceflight · 🇺🇸 US

Status & market

Private — no Canborsa market

Valuation · both companies on one scale

Valuation marks

Each bar is the last disclosed mark — $1.5B for Boom Technology (post-money, Dec 2025) and $4.2B for Relativity Space (basis undisclosed, Jun 2021).

Boom Technology

$1.5BPost-money · Dec 2025

Relativity Space

$4.2Bbasis undisclosed · Jun 2021

BOOM TECHNOLOGY · $1.5B · DEC 2025RELATIVITY SPACE · $4.2B · JUN 2021

Boom Technology vs Relativity Space · what each company discloses

What each company discloses, and what it leaves out

Boom TechnologyPRIVATEAerospace & Defense · US · 2014

+Last disclosed mark $1.5B — post-money, Dec 2025.

+Founded 2014 .

+≈25 employees.

+Latest round: Funding Round (same entity as Boom Supersonic), $300M raised, led by Darsana Capital Partners.

Relativity SpacePRIVATEAerospace & Defense · US · 2015

+Last disclosed mark $4.2B — basis undisclosed, Jun 2021.

+Founded 2015 .

+≈2,000 employees.

+Latest round: Series E, $650M raised, led by Fidelity Investments.

Verdict

Verdict

The $1.5B tells you…

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

How much capital arrived with it:$300M, led by Darsana Capital Partners in Dec 2025.

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

The $4.2B tells you…

At least one valuation basis is undisclosed, so the two numbers stay side by side, each with its own chip, and no ratio is scored. Both are private: there is no public quote and no Canborsa market on either name.

Frequently asked questions

What industries are Boom Technology and Relativity Space in?›

Boom Technology's sector is Aerospace & Defense; Relativity Space's sector is Aerospace manufacturing / commercial spaceflight.

Which is worth more, Boom Technology or Relativity Space?›

Boom Technology is valued at $1.5B, and Relativity Space at $4.2B.

When did Boom Technology and Relativity Space last raise funding?›

Boom Technology raised $300M through its Funding Round (same entity as Boom Supersonic) round in December 2025, while Relativity Space raised $650M through its Series E round in June 2021.

How many employees do Boom Technology and Relativity Space have?›

Boom Technology employs around 25 people; Relativity Space employs around 2,000.