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Mass Magnetics launch: what they're building and where to launch next

FoxPlug writes launch posts from what a startup ships and matches it to the launch communities that fit it. This page shows what Mass Magnetics is building and where it could launch next; if it is your startup, start free below.

What they're building

USA-made magnetics for robotics and defense.

Batch
Y Combinator Summer 2026
Industry
Industrials
Team size
3
Based
Boston, MA, USA

Founders

massmagnetics.com ↗

See their funding details ↗

Mass Magnetics on the record

What they shipped

  • From its YC profile: 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. (source)
  • Its own site describes it as: "Secure, domestic, high-performance magnets, made fast and made in America. Rapid sintering from recycled feedstocks. DFARS 252.225-7052 compliant." (source)

Who is behind it

  • Eric Silver, Founder/CEO: Founder at Mass Magnetics. Worked in pilot cathode production for lithium-sulfur battery chemistries. Now I'm fixing American magnet supply chains. (source)
  • Matthew Groll, Founder/CTO: Co-founder and CTO at Mass Magnetics. Former NASA/Columbia/MIT. Previously worked on thermal systems and guidance/navigation at NASA Johnson Space Center for ISS and Artemis lunar missions. Also previously worked as a Member of Technical Staff at Draper Laboratory. Studied Mechanical Engineering at Columbia, captaining the Formula SAE team and Robotics Club, then earned a Masters in Manufacturing from MIT. (source)

Timeline

  1. 2026: founded, per its YC profile. (source)

Other Industrials and energy launches on FoxPlug

Where else to launch Mass Magnetics

  • Indie Hackers Forum ↗
    Self-promotion allowed
    Audience: IndieHackers; bootstrapped solo founders sharing revenue and behind-the-scenes
  • BetaList ↗
    Self-promotion allowedPaid
    Audience: Directory listing surface; cold readers scanning categories
  • CoFoundersLab ↗
    Self-promotion allowed
    Audience: Directory listing surface; cold readers scanning categories
  • Hacker News (Show HN) ↗
    Self-promotion allowed, within the community's rules
    Audience: Hacker News readers; engineers, technical founders, infra-curious people
  • Invincible Product Hunters (Global) ↗
    Self-promotion allowed, within the community's rules
    Audience: Telegram channel readers; URL-first, attention-light
  • Launching Next ↗
    Self-promotion allowedFree, with paid options
    Audience: Directory listing surface; cold readers scanning categories
  • LaunchPedia ↗
    Self-promotion allowed
    Audience: Directory listing surface; cold readers scanning categories
  • MicroLaunch ↗
    Self-promotion allowedFree, with paid options
    Audience: Directory listing surface; cold readers scanning categories

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Featured on FoxPlug: Mass Magnetics