Ultrasonium

Manufacturing the metal parts the world runs on faster, cheaper, safer

YC Summer 2026Hard TechHardwareRoboticsManufacturing

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.

Founders

  • Hunter Brown

    Founder

    Founder & VP, Engineering at Ultrasonium Started my R&D career working at national labs by age 15. I have contributed to the ITER fusion reactor and CERN through labs at NHFML and LBNL. I have led teams of fabricators and designers in both research and industry. I am passionate about hard tech and moving groundbreaking research ideas into real products. I lead the Ultrasonium team on the novel and cutting edge technology we implement in our manufacturing process.

    LinkedIn ↗

  • Chris Carter

    Founder

    Founder & Chief Scientific Officer at Ultrasonium. PhD candidate on leave from MIT researching novel metal matrix materials and 3D printed metal heat treatments under NSF GRFP, MIT UCEM, GEM, and .406 Venture fellowship programs. Previously at Argonne National Laboratory working on additively manufactured steel. Led metal melt pool simulations for NASA-funded multi-university project. MS in Mechanical Engineering from MIT, BS from University of South Carolina.

    LinkedIn ↗

  • Jack Qiu

    Founder

    Founder & CEO of Ultrasonium. MIT PhD in EECS with research spanning quantum computing, cryogenics, signal processing, hardware control and advanced manufacturing. First author of a Nature Physics publication in collaboration with MIT Lincoln Lab under IARPA and DoD programs. Former researcher at Lawrence Berkeley National Laboratory. BA in Physics from UC Berkeley.

    LinkedIn ↗

  • Alexander Urbanski

    Co-Founder

    Founder & Chief Research Officer of Ultrasonium. Former founder of the DOE-funded nuclear startup Bay State Energy and inventor of the Nuclear Thermoelectric Generator. Studied physics at Boston University. First hire at Phase3D - built and commercialized metals manufacturing tech.

    LinkedIn ↗X ↗

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