When Peter Thiel talks about “zero to one” companies, he’s not talking about the next AI wrapper or another autonomous robot demo. He’s talking about businesses that solve problems nobody else has cracked yet. Founders Fund’s latest $220 million bet, a Series E investment in New Zealand startup Halter, is a perfect example of what that actually looks like in practice.
Halter makes solar-powered smart collars for cows. That’s it. No agentic AI. No humanoid robots. No venture capital theater. Just a deceptively complex engineering problem that Craig Piggott, the company’s 30-year-old founder, has spent nine years solving: How do you manage cattle across remote terrain without dogs, horses, motorbikes, or helicopters?
The problem sounds quaint until you realize the solution is worth $2 billion.
The Collar That Replaced the Fence
The system Halter built is genuinely clever. Each solar-powered collar communicates with low-frequency towers, connects to a smartphone app, and trains cattle to respond to audio and vibration cues. Farmers can create virtual fences, monitor every animal around the clock, and move herds without leaving the farmhouse. According to Piggott in a recent interview with TechCrunch, most cattle learn to respond within three interactions with a virtual fence, much like how a car beeps as it approaches a wall while parking.
What makes this interesting isn’t just the herding capability. The collar collects behavioral data constantly, tracking animal health, monitoring fertility cycles, and flagging sick animals before a rancher would ever notice. As Halter has accumulated what’s likely the world’s largest dataset of cattle behavior, these capabilities have improved dramatically. The company is now on its fifth generation of hardware, and its reproduction product is in beta with U.S. customers.
“The product that ranchers use today is radically different to what they bought a year ago,” Piggott said. “Every week, we’re releasing new things to our customers.”
Why This Actually Matters (Beyond Agriculture)
Here’s where the venture math gets interesting. By giving ranchers precise control over grazing patterns, Halter can lift land productivity by as much as 20 percent. In some cases, customers are literally doubling output off the same acreage. That’s not a labor savings story. That’s land efficiency that compounds every single year.
This is the kind of unit economics that makes venture investors sit up and pay attention. Unlike most agriculture technology startups that have struggled in recent years to convince farmers to adopt new products while bleeding cash, Halter’s pitch is absurdly simple: invest in our collar, make significantly more money. The company has grown to over a million collars deployed across more than 2,000 farms in New Zealand, Australia, and 22 U.S. states.
Piggott grew up on a dairy farm before studying engineering and spending time at Rocket Lab, where he glimpsed what a technology startup could actually be. He started Halter at 21. “Probably a bit naive in hindsight,” he acknowledged, “but that was fine.” Nine years later, that naivete has turned into the kind of engineering moat that actually matters.
The Competition Isn’t Coming
Merck already makes a virtual fencing system called Vence. Y Combinator’s recent demo day featured Grazemate, which pitches autonomous drones for cattle herding. But Piggott seems unbothered. He’s right to be.
The real competitive advantage here isn’t the collar itself. It’s the nine years spent chasing “many nines of reliability”—the kind of uptime where even a 1 percent failure rate means ten animals are out grazing when they shouldn’t be. That long tail of reliability takes time to prove out. It’s not the kind of problem you solve in a Y Combinator batch.
When asked about drone competition, Piggott was characteristically blunt: “I don’t think a drone is the right form factor for the core fencing element of virtual fencing. A collar will probably be the right form factor for a very long period of time.” And as for competition broadly, he had a better answer: “The biggest competition is just not changing anything. It’s doing what you did last year.”
The Global Bet
Unlike most technology companies obsessed with U.S. dominance, Halter is thinking globally. “The U.S. market is important for us, but it’s not the world’s biggest market,” Piggott said. “Agriculture is spread around the world, and we need to get there too.”
The company has raised roughly $400 million to date and is now prioritizing expansion across the U.S., South America, and Europe. The remaining opportunity is staggering: Halter’s collar is on one million cattle. There are one billion more in the world. Even in its home market of New Zealand, penetration hasn’t hit 10 percent.
This is the kind of “zero to one” bet that actually justifies venture capital’s existence. Not because it’s flashy or AI-adjacent, but because it took nine years of engineering discipline, a founder who actually understood the problem domain, and a willingness to tackle something nobody else wanted to build.
The question now isn’t whether Halter can succeed. It’s whether the venture ecosystem will keep funding founders willing to spend nearly a decade solving hard problems that aren’t sexy enough to trend on Twitter.
