# Mass Magnetics

[Mass Magnetics on Hacklab](https://hacklab.so/org/mass-magnetics)

Startup · 2 people on Hacklab

## Links

- [Website](https://massmagnetics.com/)
- [Y Combinator](https://www.ycombinator.com/companies/mass-magnetics)

## About

<!-- hacklab:yc-profile -->

## YC company profile

USA-made magnetics for 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.

- **YC batch:** Summer 2026
- **Founded:** 2026
- **Team size:** 3
- **Location:** Boston
- **Country:** US
- **Status:** Active
- **Industry:** Industrials
- **Stage:** Early
- **Tags:** Hard Tech, Robotics, Drones, Manufacturing, Defense
- **YC partner:** Vivian Midha Shen

## Founders

### 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.

[LinkedIn](https://www.linkedin.com/in/energyeric/) · [X](https://x.com/2998x10tothe8)

### 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.

[LinkedIn](https://www.linkedin.com/in/matthew-groll/) · [X](https://x.com/matthewxgroll)

[Source: Y Combinator](https://www.ycombinator.com/companies/mass-magnetics) · Retrieved 2026-11-02. Company information is self-reported on YC.

## Current staff

- [Eric Silver](https://hacklab.so/eric-silver) — Founder/CEO (Present)
- [Matthew Groll](https://hacklab.so/matthew-groll) — Founder/CTO (Present)