Westmag: Drone Dominance, Built on American Soil

Reading time: 4m 21s

What is Westmag?

Westmag, short for Western Magnetics Company, is an American manufacturer of drone motors and robot actuators, founded to break US dependence on Chinese-made motion components.

It designs and builds at "Factory 01," its headquarters and launch manufacturing facility in South San Francisco.

The defense industry: A quick overview 

“Good, fast, cheap - pick 2” has been the mantra in the defense industry for decades. And for decades, “cheap” was always third fiddle.

Makes sense: you're handing this tech to young men going overseas to stay alive. They need it in their hands as soon as possible, and it’s gotta work right from day one.

The last thing you want is the PR shitstorm to ruin your reelection chances because you decided to pinch some pennies.

But after all this time, has America forgotten how to build tech that's cheap and "good enough" to get the job done? 

Westmag doesn’t think so. Their bet = the US can stand on its own two feet and pump out drones as cheaply, as fast, and as good as the Chinese super-factories.

Let’s set the scene, because I think those who haven’t been directly plugged into the chaos of the US defense arms race are oblivious to just how ripe the area is for disruption.

A rough timeline

April 2025: China imposed export-licensing restrictions on rare-earth metals critical to drone motors. Exports of these magnets cratered 75% within weeks.

December 2025: The US Federal Communications Commission (FCC) added basically all foreign-produced drones and critical drone components to its Covered List, effectively slamming the door on new foreign-made drones and parts entering the US market.

This is the first time entire categories of parts were banned, with specifically-named entities from China/Russia historically making up the list.

Since China dominates somewhere around 90% of the drone market (you would’ve heard of companies like DJI), this brought the supply side of the equation to a screeching halt. 

Also December 2025: The Pentagon launched the Drone Dominance program, with the goal of procuring 200,000-300,000 small drones (they call them UAS - Unmanned Aircraft Systems) in the coming years, with specific emphasis on domestic drone manufacturing support.

300,000 drones * 4 motors each = over a million motors from a single program.

You see where this is heading? Massive demand + throttled supply = a power vacuum of epic proportions.

Enter Westmag (short for Western Magnetics Company), which emerged from stealth on June 2, 2026, announcing its $11 million seed round from a star-studded cap table led by a16z with  Founders Fund, Lux Capital, NFDG, and Menlo Ventures along for the ride.

Their goal is unique in its simplicity. No AI-designed next-gen drones. No quantum-piloted swarms of FPV hunter-killers. They’re taking open-source drone motor designs and building them in America. 

Read that headline for the first time and it sounds almost trivial - early reporters called it the "unsexy side of defense." 

a16z’s general partner, Erin Price-Wright put it succinctly when she said,

“David and Jordan [cofounders] understand that the win condition is not a marginally better motor. It is the ability to make a lot of them, here, on a platform that serves both drones and robots."

This capability, US-made drone motors, literally does not exist at any sizable scale. It never has had to.

The world only woke up to the asymmetric power of wartime drones after Russia invaded Ukraine - and until recently, everyone was happy buying cheap drones and parts from China.

But times are a-changing. 

Drones vs. drone motors: What’s Westmag building?

And take note of the distinction: Westmag isn’t building drones, but drone motors.

They take raw materials from the US and allied countries (notably Japan), do some processing/finishing to make the magnets useful, and pump out motors at volume. 

This means that they aren’t knife-fighting in the crowded cage with the dozens of full-up drone builders trying to win government contracts.

Westmag wins no matter who comes out on top, because every vendor in the pipeline needs compliant motors.

So it's no surprise they reportedly already have an order book in the hundreds of thousands of units, on track for tens of thousands a month by year-end.

Oh, and did we mention that these same magnets they use for drone motors are also pretty great at robot actuation too? 

Defense investors love this “dual-use” angle since they can satisfy both defense (drones) and commercial (robots) customers from the same production platform.

It hedges against shifting political priorities and the lumpy, feast-or-famine rhythm of venture funding (lots of rabbit holes here, but maybe we can dig in another time).

Actuators can apparently run 40-60% of a humanoid robot’s build cost, so this is not just a cherry on top, this is a bonafide second revenue stream.

It’s a boring business by design, but it gives us a glimpse into what “reshoring” might look like in this new, multi-polar world order we’re sliding into.

The motor designs themselves are nothing special - and we’re the ones copying China this time (oh, how the tables have turned).

What is special is initializing the capability to make them reliably, at scale, on US soil. 

Why should you care about Westmag?

In this regime, domestic supply is all that matters, and expect to see initiatives like Westmag across the board for other key pipelines historically dominated by China and other countries slipping outside of the US’s zone of control. 

This rests on the assumption that hitting China’s cost curve is achievable in America, which competitors like Atlas Motion Systems (and recent history) would contend. But we love the enthusiasm around domestic hardware development regardless.

Is it efficient? Is it “free markets” in the perfect sense of the phrase? I’m not here to pass judgment either way.

But I can say, as an American, it does fill me with some patriotic pride that we’re actually trying to build cool shit on US soil again.

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The author of this piece received his master's in aerospace engineering and previously worked on rovers (NASA) and hypersonics (defense contractor) before joining blocmates as head of research.