United States · 
Who invested in Ultrasonium?
Ultrasonium's investors include Y Combinator and Rebel Fund.
United States · Venture startup
Who invested in Ultrasonium
Funding summaryUpdated 26 Oct 2026
Undisclosedraised across 1 round since 2026, from 1 source
- Latest round
- VentureSept 2026
- Investors
- 2
The rounds
- Sept 2026
Founders and team
From Ultrasonium's own website: 4 founders.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
This firm lists Ultrasonium as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Ultrasonium
How much has Ultrasonium raised?
Ultrasonium has raised 1 round since 2026, none with a disclosed amount.
When did Ultrasonium last raise?
Ultrasonium's most recent round was a Venture in Sept 2026.
Who backed Ultrasonium first?
Ultrasonium's first round on record, in Sept 2026, was backed by Y Combinator and Rebel Fund.
What stage is Ultrasonium at?
Ultrasonium's latest named round is a Venture, in Sept 2026.
Where is Ultrasonium based?
Ultrasonium is based in the United States.
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