The Hunt
What actually makes a moat
The handful of edges that keep competitors out, and how to tell a real one from a story.
A moat is whatever stops a competitor from copying a company's profits away. Most businesses have none, which is why most never compound for long. A few have a real one, and those are the names worth hunting. The durable edges almost always take one of these shapes.
Network effects
The product gets better as more people use it, so the leader pulls away and late entrants cannot catch up. Marketplaces, exchanges, payment networks, social platforms. The tell: usage compounds on itself, and a rival with a better product still loses because everyone is already on the incumbent.
Switching costs
Once a customer is in, leaving is painful, expensive, or risky, so they stay and keep paying. Mission-critical software, systems of record, anything wired into a customer's daily workflow. The tell: high retention and quiet pricing power, because customers grumble but renew.
Brand and trust
People pay more for the name, or reach for it on reflex, because it signals quality, status, or safety. Hard to build, slow to erode. The tell: the company charges a premium for a similar product and customers still choose it.
Cost advantage and scale
The company produces or delivers for less than anyone else, because scale, location, or process lets it. It can underprice rivals and still make money. The tell: margins hold or widen as it grows, and smaller competitors cannot match the price and survive.
Widening or eroding?
A moat is not a static fact, it is a direction. The best businesses deepen their edge every year, more of the network, more switching cost, more scale, while plenty of yesterday's winners are quietly being eaten. We care less about whether a moat exists today and more about which way it is moving.