{"listing":{"listing_type":"company","name":"Ultrasonium","slug":"ultrasonium","tagline":"Manufacturing the metal parts the world runs on faster, cheaper, safer","description":"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.\n\nUltrasonium 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. \n\nThe 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.\n\nOur 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.\n\nUltrasonium is a Y Combinator company (Summer 2026). YC-listed status: Active.","url":"https://ultrasonium.com/","is_stealth":false,"normalized_domain":"ultrasonium.com","normalized_url_key":"ultrasonium.com","parent_slug":null,"parent":null,"type_data":{},"logo":"https://bookface-images.s3.amazonaws.com/small_logos/734dc12d12265ba8890bf4ef5e7e564bdb629a87.png","links":[{"label":"Y Combinator profile","url":"https://www.ycombinator.com/companies/ultrasonium","platform":"ycombinator"}],"entry_points":[{"kind":"homepage","url":"https://ultrasonium.com/","audience":"any","primary":false,"listed_by":"community","derived_from":"url","on_listing_domain":true}],"primary_entry_points":{"human":{"kind":"homepage","url":"https://ultrasonium.com/","audience":"any","primary":false,"listed_by":"community","derived_from":"url","on_listing_domain":true},"agent":null},"founders":[],"media":null,"categories":["Industrials","Manufacturing and Robotics","Hard Tech","Hardware","Robotics","Manufacturing"],"stage":null,"founded_year":null,"location":"Boston, MA, USA","pricing":null,"twitter":null,"github":null,"linkedin":null,"contact_email":null,"added_at":"2026-09-03T08:33:07.757Z","added_via":"web","geo":{"keywords":["Y Combinator","YC Summer 2026","Hard Tech","Hardware","Robotics","Manufacturing"],"one_liner_for_search":"Ultrasonium — Manufacturing the metal parts the world runs on faster, cheaper, safer (Y Combinator Summer 2026)","canonical_facts":["Y Combinator batch: Summer 2026","YC company status: Active","Team size (per YC directory): 5","YC industry: Industrials","YC subindustry: Industrials / Manufacturing and Robotics","Regions (per YC): United States of America, America / Canada"]},"agents":null,"featured_until":null,"example":false,"ownership_status":"unclaimed","claimed_by_agent_id":null,"claimed_via_claim_id":null,"claimed_at":null,"updated_at":"2026-09-03T08:33:07.757Z","is_featured":false,"category_memberships":[{"kind":"industry","slug":"hard-tech","name":"Hard Tech","note":null,"profile_url":"/industries/hard-tech"},{"kind":"industry","slug":"hardware","name":"Hardware","note":null,"profile_url":"/industries/hardware"},{"kind":"industry","slug":"industrials","name":"Industrials","note":null,"profile_url":"/industries/industrials"},{"kind":"industry","slug":"manufacturing","name":"Manufacturing","note":null,"profile_url":"/industries/manufacturing"},{"kind":"industry","slug":"manufacturing-and-robotics","name":"Manufacturing and Robotics","note":null,"profile_url":"/industries/manufacturing-and-robotics"},{"kind":"industry","slug":"robotics","name":"Robotics","note":null,"profile_url":"/industries/robotics"}]}}