My first customer definition was a category. My second was a demographic. My third was finally a person.
One of the most humbling and consistently underestimated parts of building a startup is discovering how long you can operate with a completely wrong picture of who you are building for. You think you know. You have a persona document. You have a target segment. You can describe your customer in a sentence.
But describing a customer in a sentence is not the same as understanding them well enough to build for them. I made this mistake not once but twice before I arrived at a customer definition I could actually use.
Attempt one — early-stage founders
My first target customer was early-stage founders. I am going to say the obvious thing: this is not a customer. This is a population of several million people scattered across every continent, every industry, every funding stage, and every possible motivation for starting a business.
I spent three months talking to early-stage founders and came away with completely contradictory data every single week. One founder needed fundraising tools. Another needed co-founder matching. A third wanted customer discovery frameworks. A fourth wanted help with legal structure. A fifth wanted someone to tell them whether their idea was any good.
None of them agreed on what the core problem was. The reason was obvious in retrospect: I was not talking to a customer. I was conducting a survey of a continent.
The false precision of narrowing
After recognising the problem, I did what most founders do when their target segment is too broad: I added qualifiers. Solo founders. Pre-seed. B2B SaaS. Building their first product.
This felt like progress. It looked like a customer segment. In practice, it was still too broad — but in a less obvious way that took longer to diagnose.
The problem was that I had identified a demographic without identifying a psychographic. Solo pre-seed B2B SaaS founders are not a homogeneous group when it comes to what they actually need. A former product manager building their first startup and a former academic spinning out research are both solo pre-seed B2B SaaS founders. They have almost nothing in common in terms of their anxiety, their gaps, their decision-making patterns, or what kind of tool could actually help them.
The question that cracked it open
The insight that finally unlocked a useful customer definition came from a single interview question I started asking midway through my second round of discovery: what is the specific thing you are most afraid of getting wrong?
The answers were wildly different across my broad segment. But when I looked at the answers from founders who had recently left employment to pursue their first venture — people who had made the financial and psychological commitment to quit their job but had not yet found product-market fit, had not yet raised money, and had not yet joined a formal programme — the answers converged in a way I had not seen before.
Almost all of them said some version of the same thing: I am afraid I will spend everything I have on something and only find out it was wrong after it is too late to change it.
That is a specific fear. It implies a specific need. And it implied a specific product.
Who I am actually building for
My customer is a first-time founder who has made the commitment — financially, professionally, personally — to build their first venture. They have left the safety of employment. They have a conviction about a problem. They are early enough that their assumptions are still flexible but late enough that the stakes feel real.
They are not looking for inspiration. They have plenty of that. They are not looking for a community. They have founder Slack groups for that. They are looking for a way to know whether what they believe about their business is likely to be true — before they spend the next two years finding out the hard way.
That is a person. I can picture them. I know what they read before they go to sleep, what question they wake up with, and what they are embarrassed to admit they do not know yet.
Building for a person is completely different from building for a segment. Every feature decision, every pricing conversation, every onboarding step — they all feel different when you can picture the specific human being on the other side of it. I wish I had arrived at this picture eighteen months earlier than I did.