Molly Yang

Hydrogen has a reputation problem. For decades it has been the fuel of the future, and it has stayed there - in the future, expensive, trucked around in liquefied form at more than $10 a kilogram. Molly Yang's response to all that hype is refreshingly unromantic. She picked the oldest, least glamorous tool in the box and decided to make it small.

Yang is the co-founder and CEO of Hgen, a Los Angeles company that builds alkaline electrolyzers - the workhorse devices that split water into hydrogen and oxygen using electricity. Alkaline electrolysis is not new. It is proven, it is cheap to source, and most of the energy world considers it the unsexy option next to flashier membrane technologies. That is precisely why Yang chose it.

The trick Hgen pulled off is not inventing a new chemistry. It is geometry. By rethinking the electrode design so that hydrogen and oxygen bubbles peel away from the surface faster, the team can run far more current through a far smaller stack. The claim: roughly twenty times the volumetric power density of a conventional alkaline electrolyzer. A machine that used to fill a room now fits in a fraction of the space, which means less steel, less labor, and a manufacturing line that can actually scale.

That is the whole thesis. Not a moonshot material. A smaller, cheaper, mass-manufacturable box that you can stamp out by the thousands and drop wherever heavy industry needs clean hydrogen. Hgen plans to package the entire system into 40-foot shipping containers that require only two inputs: water and electricity.

The virtuous cycle is the heart of it. Faster bubble release lets you push higher current density. Higher current density lets you shrink the stack. A smaller stack costs less to build and ship. Lower cost opens up customers who could never justify hydrogen before. Each improvement compounds the next - the kind of feedback loop that turns a lab curiosity into a product.

Yang did not arrive at hydrogen in a straight line, and that is part of the point. She studied economics and computer science at Harvard. Early on she worked as an investor at Insight Partners and, in a detail that explains a lot about how she pitches, she taught speech and debate. People who can scale a company are often people who learned, somewhere, how to make a hard idea land in a room.

From there she moved into product. She spent years in product management before landing at Tesla, where she became an energy product lead. At Tesla she worked across the company's industrial and residential energy products - industrial batteries, Superchargers, and home energy among them. It was a crash course in the thing most hardware startups underestimate: getting a product from a working prototype all the way to global field deployment, where the unglamorous problems of cost, manufacturing, and installation decide whether anything actually ships.

That experience is the spine of Hgen. The company is not promising the most efficient electrolyzer in the world. It is promising the most deployable one. Yang has said the priority is cost over peak efficiency - a choice that only makes sense if you have watched, up close, how energy products live or die at scale.

Ho came from SpaceX, where he led actuation and power systems for Starship and worked on propulsion components for Crew Dragon, the first commercial spacecraft to carry humans. Put the two backgrounds together and you get the company's unofficial operating manual: take the lessons that drove down the cost of electric cars and rockets, and apply them to the cost of hydrogen.

It is a specific kind of confidence. Tesla and SpaceX both built reputations not on inventing a single breakthrough but on relentlessly engineering cost out of systems everyone else assumed were already optimized. Hgen is making the same wager on electrolysis. The early customers Yang has in mind are companies already buying liquefied hydrogen at more than $10 a kilogram - businesses that pay a premium today for liquefaction and truck delivery, and that would happily make their own on site if the math worked.

If Hgen's containers deliver, those customers stop trucking in hydrogen and start growing it from water and electricity in their own yards. That is the unglamorous, enormous prize: not a new fuel, but the same fuel made cheap enough to finally use everywhere it should be.