Inside The Startup Reinventing America’s Trillion Dollar Chemical Industry

Summary

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Y Combinator Startup Podcast

Episode: Inside The Startup Reinventing America’s Trillion Dollar Chemical Industry

Date: March 20, 2026
Guest: Solugen Co-founders Sean and Gaurav
Host: Y Combinator

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Episode Overview

This episode dives deep into the story of Solugen, a trailblazing chemical manufacturing startup that’s redefining American industry. The founders reveal how innovation, resourcefulness, and scientific serendipity enabled them to go from a scrappy Home Depot prototype to a billion-dollar company powering critical U.S. industries. The conversation covers their unique fusion of biology and chemistry, how they disrupt legacy supply chains, and what it takes to build modern factories in America.

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Key Discussion Points & Insights

1. Solugen’s Industry-Changing Approach

• New Model for Chemicals:

  • Solugen produces chemicals using “chemi-enzymatic processing,” combining enzymes (biological catalysts) with metal catalysts for far higher efficiency and yields (up to 96% yield vs. 60% in traditional processes).

    “We use biology to create chemicals that allow us to create smaller chemical plants and have a cleaner, safer, more environmentally friendly footprint.”
    — Sean [01:02]

• Replacing Fossil Fuels with Corn Syrup:

  • Their process starts with railcars of corn syrup (not oil and gas), making it safer and eco-friendlier.

    “Solugen literally starts with sugar.”
    — Interviewer [03:30]

2. Origin Story: Scientific Serendipity

• From Medical Research to Chemistry:

  • Gaurav’s research on pancreatic cancer revealed an enzyme producing hydrogen peroxide as a defense mechanism; this sparked the core idea.

    “I found this like, really crazy mechanism in pancreatic cancer where it’s like, locally 50% hydrogen peroxide concentration. I was like, what? That's wild.”
    — Gaurav [02:34]

• What If Enzymes and Metal Catalysts Collided?:

  • The team realized combining the enzyme from cancer cells with metal catalysts could yield industrial quantities of hydrogen peroxide.

    “What if the two worlds could collide? Right? What if enzymes and metal catalysts could coexist?”
    — Sean [03:01]

3. Bootstrapping to Billion-Dollar Scale

• $10,000 Home Depot Reactor:

  • Constraints forced ingenuity: their first working reactor was built from PVC pipes, designed with prize money from a startup competition.

    “Ours ended up being pvc, like a Walmart shelf. You know, we couldn't even afford the metal catalyst parts. It was just the enzyme portion.”
    — Gaurav [05:47]

• Manually Managed Experiments:

  • Early production involved manually-operated setups, with the founders juggling day jobs and medical school.

    “We’d come in, in the morning, try to get this reactor to a steady state. And then I'd go to work. He’d go to the hospital. ... Evenings go in and try to retune it.”
    — Gaurav [06:49]

• First Customers: Dallas Spa Owners:

  • Discovered inefficiencies in peroxide supply chains and began direct sales—sometimes pouring chemicals into customers’ hot tubs themselves.

    “On weekends, we would pour the chemicals in people's hot tubs.”
    — Gaurav [07:34]

4. YC Lessons & Rapid Scaling

• YC as ‘Grad School for Customers’:

  • YC taught them deep customer empathy and direct problem validation, crucial for identifying real market needs.

    “For me, it was like grad school for customers... The second you have a PhD in your customer and you’re an expert in their world, then you know exactly what you can and can’t build.”
    — Sean [08:12]

• Focus on Techno-Economics and Clear Vision:

  • The core process, validated from the “blue beaker phase” onward, hasn’t changed fundamentally—just massively scaled.

    “The idea was fully flushed out. I don’t think the idea...has changed one bit since the blue beaker phase.”
    — Interviewer [08:41]

5. Creative Hustle & Go-to-Market Tactics

• Billboard Strategy for Customer Acquisition:

  • To land their first big oil and gas client, they bought billboards along the highway targeting a single key decision-maker.

    “Every day as he’s commuting to work, he’s just seeing your billboards.”
    — Interviewer [10:01]
    “This goes back to the customer experience. Do you think the CEO of DOW would do that? No, no way.”
    — Sean [10:17]

• Scaling Up: Bioforge Plant:

  • Their first major facility, Bioforge, was modular—built offsite, shipped, then assembled “like Legos” in Houston, holding massive reserves of corn syrup as feedstock.

    “We rented a crane for four months and just stacked it up like Legos. So all of the tan tanks are filled with corn syrup.”
    — Gaurav [10:42]

• Efficiency Leap:

  • The plant features a 60ft “bubble column” reactor—a scaled-up version of their DIY prototype—producing two to four tanker trucks of product per single Coke bottle’s worth of enzyme.

    “We feed in one Coke bottle of enzyme, and you get two to four tanker trucks of product. That’s how efficient the enzyme is.”
    — Gaurav [11:38]

• Strategic Factory Placement:

  • Building factories close to customers cuts shipping costs and undercuts giants.

    “Building out lots of factories near customers to keep shipping costs down is a key part of how Solugen has managed to undercut its larger competitors.”
    — Interviewer [12:05]

6. The Future of Manufacturing in America

• Rebuilding Domestic Industry:

  • Emphasize the possibility and importance of manufacturing in resilient, welcoming regions of the U.S.

    “If you’re in a part of the country that wants to have manufacturing back ... it is absolutely possible to build in America.”
    — Gaurav [12:19]

• Vision for the Next Decade:

  • Solugen aims to expand from bioforges to multi-asset facilities, solving new, even unimagined problems as customer needs shift.

    “Some of the problems that we’re going to solve, they don’t exist yet. ... Creating a culture that’s willing to be wrong and solve those problems is actually what’s most important right now.”
    — Sean [12:46]

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Memorable Quotes

• Sean [01:02]:
  “We use biology to create chemicals that allow us to create smaller chemical plants and have a cleaner, safer, more environmentally friendly footprint.”

• Gaurav [02:34]:
  “I found this, like, really crazy mechanism in pancreatic cancer where it’s like locally 50% hydrogen peroxide concentration. I was like, what? That's wild.”

• Gaurav [05:47]:
  “Capital constraint forces very creative thinking... ours ended up being pvc, like a Walmart shelf.”

• Sean [08:12]:
  “For me, [YC] was like grad school for customers... The second you have a PhD in your customer and you’re an expert in their world, then you know exactly what you can and can’t build.”

• Sean [10:17]:
  “This goes back to the customer experience. Do you think the CEO of DOW would do that? No, no way.”

• Gaurav [11:38]:
  “We feed in one Coke bottle of enzyme, and you get two to four tanker trucks of product. That’s how efficient the enzyme is.”

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Timestamps for Key Segments

• 00:05–01:02: Introduction to Solugen’s mission and new chemical manufacturing model
• 02:00–03:30: The “eureka moment” and scientific breakthrough
• 05:35–07:41: Building the first reactor and landing initial customers
• 08:12–09:05: YC’s role and customer obsession
• 09:24–10:08: Moving to Houston, first large pilot reactor, and the “billboard hack”
• 10:32–11:34: Building the Bioforge plant and scaling their process
• 11:54–12:05: Factory network near customers as market advantage
• 12:19–12:46: The outlook for American manufacturing and Solugen’s future vision

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Closing Thoughts

This episode embodies the spirit of “building” at the heart of YC: crazy ideas, bootstrapped prototypes, rapid iteration, relentless customer focus, and a belief that the next industrial revolutions will be solved not just with software, but with science, hustle, and American manufacturing muscle. Solugen’s journey not only challenges preconceived notions about “hard tech” startups but charts a blueprint for the next generation of industrial entrepreneurs.

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Transcript

[Interviewer]

This reactor in Houston, Texas represents a whole new approach to chemical manufacturing.

[Sean]

We make chemicals in a completely new way. We started off by making hydrogen peroxide. Now we sell products for water treatment, national defense, infrastructure, agriculture. You name it, we make a chemical for it.

[Interviewer]

The story of Solugen is as scrappy as it gets. It all started with this prototype built out of PVC pipes the founders bought from Home Depot.

[Gaurav]

In its heyday, this did 12,000 bucks a month in revenue.

[Interviewer]

Fast forward to now. Soligen is a billion dollar company shipping out tanker trucks of products that power critical US industries. So how did they go from this single beaker of hydrogen peroxide to this full scale manufacturing plant? I visited Soligen HQ in Houston, Texas to find. What do you guys do here? What is Solugen?

[Sean]

We use biology to create chemicals that allow us to create smaller chemical plants and have a cleaner, safer, more environmentally friendly footprint. We've invented a process called chemiensomatic processing, where we take the specificity of biology by taking an enzyme and pairing it with a metal catalyst, which is what's traditionally used in industry. What we've done with these is by marrying these two, you can actually create more efficient reactions. So instead of having a 60% yield, you can have 96% yield, which is what we have at scale precisely because of these two catalysts.

[Interviewer]

Cygen is the first company to fuse biology and chemistry in this way. Pulling enzymes from living cells, in this case corn syrup, and pairing them with novel metal catalysts. The output is chemicals that can be used in everything from agriculture to skincare. Traditionally, chemical plants relied on fossil fuel feedstock, which has led to all kinds of unintended consequences. This new approach is cleaner, safer, and more efficient.

[Gaurav]

We receive railcars of corn syrup and then we run our utility system. We change the parameters of the plant. The way that the enzymes are reacting, the way that the metal catalysts are reacting to oxidize the corn syrup how we want. And then at the end, we evaporate water. Water. We take the final products, we store them in finished good tanks, or we send them to a blend farm to get blended with other chemicals. And that's the process.

[Interviewer]

Cyagen started with a true eureka moment. The kind of freak invention that normally happens only in science fiction. Sean was working in the chemicals industry and Gaura was in medical school studying pancreatic cancer.

[Gaurav]

I was working on this, like, Skunk works project to try to do direct hydrogen peroxide synthesis, where you react hydrogen and oxygen gas directly together over a metal catalyst. And then, you know, I was working on this project, and then Gore was like, oh, yeah, no, Like, I found this, like, really crazy mechanism in pancreatic cancer where it's, like, locally 50% hydrogen peroxide concentration. I was like, what? That's wild.

[Interviewer]

It turned out that an obscure enzyme found in pancreatic cancer cells that Gaurav was studying was the key to a new process for making industrial hydrogen peroxide.

[Sean]

So these pancreatic cancer cells, they put out peroxide. Peroxide creates almost like an invisibility cloak around the pancreatic cancer that makes it difficult for immune cells to come in. It was like, that's a very interesting discovery, but why? And so once we asked the question why, we found out the reason was an enzyme. It was just a mutated enzyme that's found only in pancreatic cancer. And so that's when we said, what if the two worlds could collide? Right? What if enzymes and metal catalysts could coexist?

[Interviewer]

Here's how it works. Cyagen feeds corn syrup to the enzymes, the same ones from the pancreatic cancer cells, which transform it into new compounds. They then use metal catalysts to further process those into the final chemicals, and that can be used to build all kinds of products we use in our everyday lives. In most chemical plants, the feedstock comes from oil and gas, which inevitably produces toxic byproducts. Solugen literally starts with sugar.

[Sean]

We have to suspend belief for a second. People believe that anything to do with biology and chemicals, it's just a bad mix because, oh, biology is too sensitive, it's going to break down, blah, blah, blah, blah, blah. But we said, let's suspend that criticism for a second and just look at the numbers and we say, if we can make the enzyme last this long on stream and the product is this concentration, we can make a lot of money. And that's where we started.

[Interviewer]

This insight that organic enzymes could operate at industrial scale and efficiency was the company's first key breakthrough. Today, Cyagen operates both a biology and metals lab, where it produces its own enzymes and metal catalysts.

[Sean]

And in house, these are actually enzymatic reactors. So what we do, we grow bugs. We break the bugs open, we take the enzymes and we put them in these reactors and we can stress them out and figure out what they're capable of doing at scale. We have outfitted this with probably some of the best analytics that you can ever have for enzymes, which gives us a good insight into how things will scale.

[Interviewer]

Across from the biology lab is Soligen's metals lab.

[Sean]

We Just went to the enzyme lab, basically. Now we pair that enzyme with the right metal and so you can basically mix and match which metal and which enzyme you want to pair together.

[Interviewer]

Their next big insight was a commercial one. Previous startups that had tried to do something like this all started by raising a huge amount of funding and building a large scale plant. Sligen took a different approach. They built their first reactor for just $10,000 and then started selling to customers almost immediately. Gradually, they scaled up to larger and larger plants. So you did this techno economic analysis and you're like, wait a second, this could actually work.

[Gaurav]

So May 2016, we got unofficial second place in the MIT 100k competition.

[Sean]

We lost.

[Gaurav]

We lost gloriously. But we got 10,000 bucks.

[Interviewer]

$10,000? That doesn't seem like very much money.

[Gaurav]

I think capital constraint forces very creative thinking because like with 10 grand, like you have a very confined space of what you can afford to buy to try to make the product. And so ours ended up being pvc, like a Walmart shelf. You know, we couldn't even afford the metal catalyst parts. It was just the enzyme portion.

[Interviewer]

This was the very first solujin reactor.

[Gaurav]

Yep, this is the first one, complete with Schedule 80 PVC from Home Depot. This is like a bubble column with a membrane. So you sparge air into the bottom. Inside there's the liquid with the corn syrup and the enzyme, and it's kind of spinning in a loop. Then they're reacting, which makes the peroxide. And then this is a membrane. And so the membrane keeps the enzyme in the bubble column and then the permeate on the membrane is the peroxide product.

[Interviewer]

Armed with just their $10,000 reactor but no customers, Sean and Gorb applied and were accepted into yc, where they deferred a few months and set out to first try and sell the tiny volumes of peroxide they could make.

[Gaurav]

We made our first product in like September 2016. We couldn't afford any controls, right? So this is a total manual operation. We'd come in, in the morning, we would try to get this reactor to a steady state. And then I'd go to work. He was, he'd go to the hospital. He was in his last year of med school.

[Sean]

I was on surgery rotation.

[Gaurav]

Surgery rotation, wow.

[Sean]

Yeah. 36 hour shifts.

[Gaurav]

Good times. And then in the evenings go in and try to retune it to a steady state. And then our first three customers were float spa hot tub owners in Dallas. We discovered the supply chain dislocations because for these hot tub owners, they were buying 3% peroxide in the brown bottle on the store that went through multiple distributors, multiple down packers putting in little brown bottles, shipping it to the store, retail markup, it's like, oh, we only have 10 grand, but, like, we're actually manufacturing the chemical and we're like, bypassing, like, huge distribution value chains. So on weekends, we would put pour the chemicals in people's hot tubs.

[Sean]

We looked at a bunch of markets to be like, what can we just, like, wedge ourselves into?

[Interviewer]

When we first accepted Soligen into yc, they had zero revenue, but they deferred by a batch and spent six months getting those first customers. By the time they started at yc, they were gaining traction. Typically when people think about hard tech companies like you guys in yc, they're like, that makes no sense. What could you possibly accomplish for like, a few hundred thousand dollars? To most people, it intuitively seems hilariously mismatched to the, like, costs and timelines of something like a new chemical plant.

[Sean]

This fundamentally goes back to the customer experience, which is what YC taught us to do. Right. It was really like, for me, it was like grad school for customers is how I look at YC, where it's like, the second you have a PhD in your customer and you're an expert in their world, then you know exactly what you can and can't build. It's that simple. If you know this customer is not the right fit, that's okay, go to the next customer.

[Interviewer]

I remember the picture of the beaker, because in your, like, demo video, that's what it was.

[Sean]

Do you remember this?

[Gaurav]

The blue beaker. And then we had the color change back and forth with the metal catalyst.

[Interviewer]

But. But I remember another thing about your application patient, which is even though the only thing you'd actually made was, like, one beaker full of this stuff, you had the idea completely worked out. Like, you totally understood the reason that this would work. You'd worked out all the techno economics. Like, all the math was done. The idea was fully flushed out. I don't think the idea, like, the core idea has changed one bit since the blue beaker phase.

[Sean]

Literally the same.

[Interviewer]

Yeah, it's just like a million times larger.

[Sean]

Is this larger?

[Interviewer]

During yc, you guys are still driving around with, like, buckets of peroxide and selling them to spas. You finish YC, you raise your $4 million seed round. What. What happens then?

[Sean]

So we moved to where our customers were, which was Houston, Texas, and we used the seed capital to build our first big pilot reactor. Not just A PVC pipe reactor, but a proper 1500 gallon type reactor.

[Gaurav]

And then our first oil and gas field trial was January 2018. And so we had billboards targeting this guy so we could go get our first oil and gas field truck.

[Interviewer]

Wait, you had billboards targeting one guy?

[Sean]

So what we did, there was one guy at our, at the saltwater disposal company who controlled all of the chemical spend. What we figured out was where he frequents, like he actually goes to the field, where he goes and where he lives, or at least the neighborhood he lives in. And we bought up the billboard.

[Interviewer]

And billboards are cheap along the highway that he commutes to work in so that every day as he's commuting to work, he's just seeing your billboards.

[Sean]

And then eventually he gets a call from us. It's like a priming aspect of it that if we knew this was the guy, I was willing to spend 10 to 15k just to make sure that we can get in front of the guy. And the second that he saw that and got a call from us, he was like, oh, I see your billboards everywhere. And so that's when he felt special. Right. This goes back to the customer experience. Do you think the CEO of DOW would do that? No, no way. They were not going to do that.

[Interviewer]

Soon Sigen had signed enough customers that they were able to raise money again and build their first state of the art plant, the Bioforge one. So this is Bioforge.

[Gaurav]

Everything you're looking at here was built in five locations simultaneously and then shipped here on trucks. We rented a crane for four months and just stacked it up like Legos. So all of the tan tanks are filled with corn syrup. That's our raw material. We are able to hold four rail cars of corn syrup at any one time, which is about £800,000.

[Interviewer]

So it's like £800,000 of corn syrup in these four large tan tanks. That's the starting material for the whole plant.

[Gaurav]

That's the starting material for the whole plant. And then the plant runs continuously 24,7. So this is the full scale version of the PVC reactor. Is this the bubble column? This is the bubble column.

[Interviewer]

It's so tall.

[Gaurav]

60ft tall. It's identical to the PVC reactor from Y combinator. It's just 10,000 gallons instead of 7 gallons. We sparge air in the bottom. Corn syrup and enzyme go in the top and the two react together.

[Interviewer]

All the other stuff is necessary. But like this piece is the magical piece, right?

[Gaurav]

This is the reactor that Makes it happen. Yep. We feed in one Coke bottle of enzyme, and you get two to four tanker trucks of product. That's how efficient the enzyme is. Wow.

[Interviewer]

After filling up the tanks, Cyagen loads up trucks to distribute the chemicals to nearby customers.

[Gaurav]

So this is the end of the line. This is where customers pull up either with their own trucks or Solugen supplies trucks and does all the logistics for them. And we're able to fill up trucks at about 300 gallons per minute.

[Interviewer]

Building out lots of factories near customers to keep shipping costs down is a key part of how Sligent has managed to undercut its larger competitors. What has it been like to build new, like, physical stuff in America?

[Gaurav]

It is definitely challenging, but if you're in a part of the country that wants to have manufacturing back, that's favorable to manufacturing, like, it is absolutely possible to build in America.

[Interviewer]

What does Solagen look like in 10 more years?

[Gaurav]

It's actually going to be multiple different assets. So we're actually like, we've taken enzymes and metal catalysts and applied them to not just bioforges, but other types of manufacturing assets that combine them. And we'll be solving the most fascinating customer problems that, like, right now, we're not even aware of them.

[Sean]

Some of the problems that we're going to solve, they don't exist yet. And so it's like just creating a culture that's willing to, like, be wrong and solve those problems is actually what's most important right now.