Mass Magnetics
Mass Magnetics is a YC Summer 2026 (S26) company. Based in Boston, MA, USA. Team of 3.
About Mass Magnetics
Summary
Mass Magnetics manufactures high-performance permanent magnets in the United States from recycled rare-earth scrap, targeting aerospace, robotics, defense, and industrial manufacturers. Its NdFeB magnets, graded up to N52, are fully milled and sintered domestically, making them compliant with DFARS 252.225-7052 rules that restrict covered-country materials. The product replaces foreign-sourced magnets for customers who must meet domestic supply requirements without accepting lower magnetic performance.
Business model
Per-order pricing via instant quote, plus preorder agreements for DFARS-compliant magnet delivery.
Go-to-market
Defense, aerospace, and industrial manufacturers buy directly, starting with a self-serve instant-quote tool on the website; the company is also accepting preorders from customers working toward 2027 DFARS compliance deadlines.
From the Y Combinator listing
USA-made magnetics for aerospace, robotics, and defense.
Mass Magnetics turns recycled rare-earth scrap into high-performance permanent magnets, made in America. The materials we supply are the backbone of electric motors, sensors, speakers, hard drives, and electronics. Our process enables DFARS-compliant magnets for defense, aerospace, and industrial manufacturers who demand domestic supply without compromising on quality. Operations in Greater Boston, MA (Greentown Labs) and Columbus, IN.
Facts
- Industrials / Industrials -> Defense
- Boston, MA, USA
- 3
- Active
- Early
Founders (2)
Score every batch against your own thesis
GPAgent's sourcing agent reads every company in a batch, scores each one against your fund's thesis in a private workspace, and lines up the founders worth meeting before Demo Day. You decide who to contact. Your scores, notes, and pipeline never appear on these pages.
How Accelerator intelligence works