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14,448 startups · 29 programs

Mass Magnetics

Active · USA-made magnetics for robotics and defense.

WebsiteYC profile

Why it ranks

How the rank works
7signal of 100 · rising 7
  • went through YCProgram · this site+4
  • team of 3Team size · YC's directory+3.1

A sum of public facts, not a judgement and not investment advice.

Competitors

AIGUILDShared: defense, manufacturing, aerospaceYC S26New York CityStartup →
Companies closest to Mass Magnetics
Company
GUILDShared: defense, manufacturing, aerospaceYC S26ActiveAI

Adjacent

OtherRarEarth S.r.l.Shared: rare earth, magnets, electronicMassChallenge Switzerland 2025ItalyStartup →OtherMagnoTherm SolutionsShared: permanent magnets, magnetic, materialPlug and PlayGermanyStartup →OtherVernius Systems, Inc.Shared: drones, defense, massYC S26San FranciscoStartup →OtherAlbacore Inc.Shared: drones, defense, massYC S25PhiladelphiaStartup →OtherNull LabsShared: robotics, defenseYC F25San FranciscoStartup →
Companies next to Mass Magnetics
Company
RarEarth S.r.l.Shared: rare earth, magnets, electronicMassChallenge Switzerland 2025Not statedOther
MagnoTherm SolutionsShared: permanent magnets, magnetic, materialPlug and Play Not statedOther
Vernius Systems, Inc.Shared: drones, defense, massYC S26ActiveOther
Albacore Inc.Shared: drones, defense, massYC S25ActiveOther
Null LabsShared: robotics, defenseYC F25ActiveOther

Also from S26

All of S26
AISynapse SemiconductorNew semiconductors that merge compute and visionYC S26DurhamStartup →AIUltrasoniumMetal manufacturing, faster, cheaper, and more versatile.YC S26BostonStartup →AILibra RoboticsThe robot workforce for infrastructure of the AI eraYC S26San FranciscoStartup →AIMoving AtomsScan to 3D ModelYC S26San FranciscoStartup →AINeuromorphicBuilding robots to automate wetlabsYC S26San FranciscoStartup →AIPacificRobotic factories to mass produce data centersYC S26San FranciscoStartup →
Company
Synapse SemiconductorNew semiconductors that merge compute and visionteam of 2hiringActiveAI
UltrasoniumMetal manufacturing, faster, cheaper, and more versatile.team of 5ActiveAI
Libra RoboticsThe robot workforce for infrastructure of the AI erateam of 2ActiveAI
Moving AtomsScan to 3D Modelteam of 2ActiveAI, Data
NeuromorphicBuilding robots to automate wetlabsteam of 3ActiveAI
PacificRobotic factories to mass produce data centersteam of 6ActiveAI

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
7h ago

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

Mass Magnetics in S26: 229 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.