The definition
A market opportunity is a demand that already exists in the world, is not adequately met by what people can buy today, and is large and urgent enough that a new entrant can serve it and get paid. Every word in that sentence is doing work, and dropping any one of them is how people end up building something nobody wanted.
"Already exists" rules out demand you have to create by persuasion. "Not adequately met" rules out markets where the incumbent is fine and the complaint is cosmetic. "Large and urgent enough" rules out the genuine but tiny problem that will never pay for the work. And "get paid" rules out the enormous category of things people want intensely and will not spend money on.
A market opportunity is not a business idea
An idea is a proposed solution: "an app that does X". An opportunity is a condition of the market that exists whether or not anyone has had an idea about it. The distinction matters because the two fail differently. A wrong idea against a real opportunity is recoverable — you change the product and the demand is still there. A brilliant idea against an imagined opportunity fails no matter how well it is executed.
This is why opportunity comes first in the order of work. Ideas are cheap and interchangeable; the scarce thing is a demand you have verified independently of your own enthusiasm for a solution.
The four conditions
A demand has to clear all four of these at once. Three out of four is the most common shape of a failed company, and each missing one fails in its own recognisable way.
- Demand — more than one person, independently, is asking. Volume matters less than independence: fifty replies in one thread is one person's problem with an audience.
- Pain — the demand costs the person something today: money, hours, or a workaround they are visibly annoyed by. A wish is not a pain.
- Willingness to pay — someone in the evidence is already paying for a worse answer, or asking what a better one would cost. This is the condition most often skipped.
- An opening — the people who already serve this market are not serving it well, are too expensive, or do not serve this segment at all. If they are doing fine, the gap you see is probably your own unfamiliarity.
Five types of market opportunity
Naming the type is useful because each one has a different failure mode and a different first move.
- Unserved demand — people are asking for something that does not exist. Rare, and usually rare for a reason worth understanding before you celebrate.
- Underserved demand — a product exists but is priced, packaged or localised for someone else. The most common real opportunity, and the easiest to verify.
- Badly served demand — an incumbent owns the market and its users are visibly unhappy. Reviews and issue trackers are full of this, and the evidence is unusually specific.
- Shifting demand — a change in technology, price or regulation has just made something possible or necessary. Timing is the whole game, and the window closes.
- Transferred demand — something that works in one market and has no equivalent in another. Cheap to spot, and dangerous to assume travels without change.
What looks like an opportunity and is not
The four most expensive false positives, in the order they cost people the most time: the loud minority, where one articulate person's complaint gets amplified until it reads like a market; the free-only market, where the demand is genuine and the willingness to pay is zero; the fading market, where the level of demand is still high but the trend has been down for a year; and the gap that exists on purpose, where nobody serves this segment because serving it is unprofitable, illegal, or structurally impossible.
Three of the four are visible in the evidence itself if you look at counts of distinct people, at whether money is mentioned, and at the direction of the last few months rather than the total.
How this site measures one
Opportunity Market takes public posts from Reddit, GitHub, Hacker News, app-store reviews and Vietnamese forums, groups different phrasings of the same problem into one cluster, and scores each cluster on demand, pain, momentum, competition, monetization potential, market size and evidence quality. The score is deterministic — no language model adjusts a number — and every figure links back to the posts it was computed from.
That is the whole point of scoring rather than listing: an opportunity you cannot check is a claim, and this page is about the difference.