Defiant Health

Boston, MA · Privately Held (backing)

Operator of a virtual breast health clinic intended to accelerate expert diagnosis and treatment for breast cancer. Defiant Health is based in Boston, MA. Its last reported valuation was $17 million in Jul 2025. It has raised $3.8 million.

Last reported valuation
$17.0M
Oct 2026
Priced at
—
Total raised
$3.8M
Last round
—

Who backs Defiant Health?

4 investors
InvestorType
City Light CapitalVenture capital
Amboy Street VenturesVenture capital
Hannah Grey Ventures—
Headwater Ventures—
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Defiant Health investors

4 investors are on record for Defiant Health, including City Light Capital, Amboy Street Ventures, Hannah Grey Ventures and Headwater Ventures.

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