Winning today isn't the question
Almost every company that gets to Series A has already shown it can win some customers. The harder question is defensibility: what stops a well-funded competitor, or the incumbent whose lunch is being eaten, from simply copying the product once it's proven to work? A company with no defensibility can put up great numbers for two years and still be worth little at exit, because competitors erode the margin the moment the category gets crowded.
| Moat type | How it works | Durability |
|---|---|---|
| Network effects | Each new user makes the product more valuable to every existing user | Very high once critical mass is reached; slow to build |
| Data moat | The product improves with usage data a competitor doesn't have | High, but only if the data genuinely improves the product, not just accumulates |
| Switching costs | Migrating away is expensive, risky, or disruptive once embedded | Medium-high, strongest in workflow-critical enterprise tools |
| Brand / distribution | Being the default choice, trusted name, or cheapest acquisition channel in category | Medium, erodes fastest under sustained, well-funded competition |
What isn't a moat
"We're first" and "we move faster" are advantages, not moats, both erode the moment a well-capitalized competitor enters. The honest test: name the specific reason a customer, once acquired, would refuse to switch even if a competitor offered something 20% better. If the honest answer is "they wouldn't," the company doesn't yet have a moat, whatever its current traction looks like.
Checkpoint
- Defensibility: what stops a competitor from copying a proven product.
- The four common moat types: network effects, data, switching costs, brand/distribution.
- Speed and being first are advantages, not moats, on their own.
If anything here still feels unclear, ask before moving to Lesson 12.