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YCS26ยท AI

Ultrasonium

Metal manufacturing, faster, cheaper, and more versatile.

ActiveChecked 19h ago
Batch
S26
Status, per YC
Active
Team size
5
HQ
Boston, MA
In S26231 companies, 88% AI

Founders

  • Jack QiuFounder/CEO
  • Hunter BrownFounder
  • Chris CarterFounder
  • Alexander UrbanskiFounder

Same space

About Ultrasonium

The technologies that define this century, including data centers, rockets, satellites, and robots, are built from complex metal parts. As these systems advance, the parts get harder to make. Past a certain complexity, casting and machining stop working, and the advanced methods that remain are slow, expensive, and hazardous. Ultrasonium has invented a new manufacturing method to make these critical parts 15x faster and 75% cheaper than the methods they replace, in the U.S. and at scale. Solid metal feedstock goes in and a finished part safely comes out, controlled by a physical AI layer and novel control processes. The systems that matter most, in aerospace, energy, and compute, are demanding metal geometries that can't be machined or cast and are too expensive and slow to make with incumbent methods, at a moment when domestic manufacturing capacity is a national priority. Our founding team has built and innovated some of the most complex engineering systems known to man: quantum computers, superconductors, nuclear reactors, and novel aerospace alloy processing methods.

Boston, MA, USA

Ultrasonium: questions

Which YC batch was Ultrasonium in?

Ultrasonium was in Y Combinator's Summer 2026 batch (S26).

Is Ultrasonium still active?

Y Combinator lists Ultrasonium as active.

Who founded Ultrasonium?

Ultrasonium's founders, as listed on its YC page: Jack Qiu (Founder/CEO), Hunter Brown (Founder), Chris Carter (Founder), Alexander Urbanski (Founder).

Where is Ultrasonium based?

Ultrasonium lists Boston, MA, USA as its location on YC's directory.

Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.

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