Mass Magnetics

YC S26 · Active · USA-made magnetics for robotics and defense.

Competitors

Companies closest to Mass Magnetics
Company	Category	Status	Program
GUILDShared: defense, manufacturing, aerospaceActiveAI	AI	Active	YCS26
MagnoTherm SolutionsShared: permanent magnets, magnetic, materialNot statedOther	Other	Not stated	Plug and Play
Vernius Systems, Inc.Shared: defense, drones, massActiveOther	Other	Active	YCS26
TheseusShared: defense, drones, roboticsActiveOther	Other	Active	YCS24
Vision LabShared: manufacturing, robotics, industrialActiveAI, Data	AI, Data	Active	YCX25

Adjacent

Companies next to Mass Magnetics
Company	Category	Status	Program
Albacore Inc.Shared: defense, drones, massActiveOther	Other	Active	YCS25
Null LabsShared: robotics, defenseActiveOther	Other	Active	YCF25
Seeing SystemsShared: defense, drones, earthActiveAI	AI	Active	YCW26
EdgerunShared: defense, robotics, highActiveOther	Other	Active	YCS26
IcarusShared: defenseActiveOther	Other	Active	YCF25

Also from S26

All of S26

Company	Category	Status
Synapse SemiconductorNew semiconductors that merge compute and visionActiveAI	AI	Active
UltrasoniumMetal manufacturing, faster, cheaper, and more versatile.ActiveAI	AI	Active
Libra RoboticsRobotic crews for large-scale infrastructure constructionActiveAI	AI	Active
Moving AtomsVirtual Reality for Training RobotsActiveAI, Data	AI, Data	Active
NeuromorphicBuilding robots to automate wetlabsActiveAI	AI	Active
PacificMass-producing and financing micro data center incredibly quickly.ActiveAI	AI	Active

About Mass Magnetics

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: S26 · Summer 2026
Status, per YC: Active
Category: Other
Team size: 3
Location: Boston, MA, USA
Checked: 35m ago

YC tags: Hard Tech, Robotics, Drones, Manufacturing, Defense

Mass Magnetics in S26: 231 companies, 88% AI

Mass Magnetics: questions

Which YC batch was Mass Magnetics in?

Mass Magnetics was in Y Combinator's Summer 2026 batch (S26).

Is Mass Magnetics still active?

Y Combinator lists Mass Magnetics as active.

Where is Mass Magnetics based?

Mass Magnetics lists Boston, MA, USA as its location on YC's directory.

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