Business Ideas
Startup Ideas: How to Shortlist Using Buyer Problems
Lists of startup ideas are easy to find. Choosing between them is the hard part. The founders who choose well rank ideas by the buyer's problem, not by how exciting the idea sounds. Here is a way to do that.
To shortlist startup ideas, rewrite each one as a buyer problem (who has it, how often, what it costs them), then score them on how urgent the problem is, whether buyers already spend on it, whether you can reach them, and whether you know the domain. Test the top idea with real buyers before you consider the rest.
Paul Graham's warning applies to every idea list, including ours: "Why do so many founders build things no one wants? Because they begin by trying to think of startup ideas" (Paul Graham). A list is a place to find problems, not a menu of answers.
Key takeaways
- Rewrite every idea as a buyer problem. If you cannot, drop it.
- Score on urgency, existing spend, reach and your knowledge.
- Competitors are usually a good sign; they prove buyers pay.
- Prefer a small group that needs it badly over a large group that would like it.
- Test the top idea before touching the second.
How do you turn a startup idea into a buyer problem?
Name who has the problem, when it happens, what they do about it now and what that costs them. An idea you cannot describe this way is not ready to be compared.
| Idea as usually written | As a buyer problem |
|---|---|
| "AI for recruiting" | "Recruiters at agencies with 5 to 20 staff spend hours each week reformatting candidate CVs for each client's template." |
| "A marketplace for tutors" | "Parents of secondary-school students struggle to find a tutor for a specific exam board at short notice before exams." |
| "Compliance automation" | "Operations managers at multi-state insurance agencies track producer license deadlines in spreadsheets and miss some." |
The examples are illustrations. The point is the form: once every idea is written this way, they can be compared on the same terms.
Where do good startup ideas come from?
Mostly from problems the founder has seen up close. Lists, briefs and generators are useful for spotting problems in areas you already know.
Graham's advice is to "look for problems, preferably problems you have yourself", and to "live in the future and build what seems interesting" (Paul Graham). In practice, the best sources are:
- Your own work, and the tasks colleagues complain about
- A field you studied or trained in
- Communities you belong to
- Industry briefs and idea lists, filtered for areas you know
NELL's IdeaBank publishes industry briefs with trends, pains and buyers, and the free AI idea generator suggests ideas for a field you name. Our guide to finding a business idea covers the process in more detail.
How do you score and shortlist startup ideas?
Use a small scoring sheet with the same criteria for every idea. Five criteria are enough to separate strong candidates from weak ones.
| Criterion | 1 = weak | 5 = strong |
|---|---|---|
| Urgency | A mild annoyance | Costs money or causes real risk, often |
| Existing spend | Nobody pays for anything today | Buyers already pay for tools, people or services |
| Reach | You cannot name where buyers are | You can reach 50 this month |
| Your knowledge | New to the field | You have worked in it |
| Timing | Nothing has changed | A new rule, tool or price makes it newly solvable |
Keep the top two or three. Graham's "well" metaphor is a good tie-breaker: "You can either build something a large number of people want a small amount, or something a small number of people want a large amount. Choose the latter" (Paul Graham).
Should you avoid startup ideas that already have competitors?
No. Competitors usually show that buyers pay to solve the problem. What matters is whether there is a group of buyers they serve badly that you can reach.
In Graham's words: "Even if you find someone else working on the same thing, you're probably not too late. It's exceptionally rare for startups to be killed by competitors" (Paul Graham). An idea with no competitors and no existing spend is often a sign that the problem is not painful enough to pay for.
How do you test the top idea quickly?
Talk to people who have the problem this week, ask about the last time it happened and what it cost, and offer the most interested a small paid version.
Our business idea validation checklist covers the evidence to collect. A free Quick Validate gives a first read on each shortlisted idea in minutes, which is a quick way to see which one's weaknesses to test first.
Frequently asked questions
How do I choose between several startup ideas?
Rewrite each as a buyer problem, score them on urgency, existing spend, reach, your knowledge and timing, then test the top one with real buyers before looking at the others.
What makes a startup idea good?
A specific group has an urgent problem, already spends money or time on it, can be reached, and will commit to paying for a better solution.
Are AI startup ideas a good bet in 2026?
AI makes some old problems newly solvable, which is a timing advantage. The idea still needs a buyer with an urgent problem and a budget; the AI is the method, not the reason to buy.
Should I keep my startup idea secret?
Usually not. Talking to buyers is how you learn whether it is worth pursuing, and ideas are rarely the hard part to copy. See our guide to stealth startups for the exceptions.
How many startup ideas should I test at once?
One. Testing properly takes focused conversations with one type of buyer. Spread across several ideas, none gets enough attention to reach a clear answer.
Start where you are
A list gives you candidates. Buyers tell you which one is real.
Sources
The example buyer problems are illustrations, not recommendations.