What is a Market?

Most go-to-market confusion traces back to a bad definition of "market." The sloppy version ("people who might buy our product") treats a market as a set. Geoffrey Moore's definition in Crossing the Chasm treats it as a network, and that distinction turns out to matter enormously for how you sell.

The definition

For high-tech products, a market is:

1. A set of actual or potential customers
2. For a given set of products or services
3. Who have a common set of needs or wants, and
4. ==Who reference each other when making a buying decision.==

Points 1-3 are standard. Point 4 is the one that actually determines how GTM works.

If two people buy the same product for the same reason but have no way they could reference each other, they are not part of the same market. They are in different ==market segments==.

Why the reference condition is operative

The reason the "reference each other" clause matters is that buying decisions in B2B and prosumer categories are almost always socially mediated. Buyers don't evaluate products from first principles. They look for people like them who've already made the decision and copy the pattern. This is a cognitive shortcut, and it's the dominant signal in most categories.

Three practical implications:

1. A shared buying pattern requires a shared reference network. Chemistry professors and radiologists might both buy the same high-precision scale, for the same reason (accurate measurements). But they don't attend the same conferences, read the same journals, or ask each other for vendor recommendations. Selling to both is two GTM motions, not one.
2. References compound inside a market and don't leak out of it. Winning ten customers in investment banking gives you enormous leverage to win the eleventh (they all talk to each other). Winning ten customers in ten disconnected industries gives you almost no leverage on the eleventh — each sale starts from zero.
3. The beachhead strategy only works because of the reference condition. "Dominate a narrow segment first" is good advice precisely because within a reference network, proof compounds. Outside it, proof doesn't travel.

How to identify a real market

Three tests to distinguish a real market from a pseudo-market:

1. Shared watering holes. Do the buyers attend the same conferences, subscribe to the same newsletters, listen to the same podcasts, or read the same publications? If not, they're not a market.
2. Shared vocabulary. Do the buyers use the same jargon to describe their problem? Radiologists and chemists both say "accurate measurement," but they use different words for why it matters. Different vocabulary = different market.
3. Shared decision process. Does the buying committee look structurally similar across customers? Who signs the check, who blocks the deal, who champions the purchase internally — if the roles map cleanly across customers, it's probably one market. If they don't, it's segments.

Common pseudo-market mistakes

Three kinds of "markets" that look like markets but aren't:

• Vertical + horizontal mashups. "Our market is marketing teams at SaaS companies." This sounds specific but crosses multiple reference networks — CMOs at 50-person seed-stage startups and CMOs at 5,000-person public companies share job titles but not reference networks. The seed-stage CMO reads IndieHackers and follows Product Hunt; the public-company CMO reads Gartner and talks to the CIO. Treating them as one market guarantees you'll serve neither well.
• Technology buyers in general. "CTOs" is not a market. There are dozens of reference-isolated CTO communities (fintech vs consumer vs deep-tech vs Series A vs F500), and the right GTM motion for each is different.
• Persona-based segments. "Knowledge workers who want to be more productive" is a persona, not a market. Productivity tools that target this abstraction usually end up with TAM-theater slides and no actual beachhead.

Why this matters for early-stage GTM

For a zero-to-one product, the definition directly drives the tactical plan:

• Pick a beachhead where the reference network is tight. Tight = 50-500 buyers who all know each other. This is more valuable than a 50,000-buyer loose network because references actually travel.
• Map the network before selling into it. Who are the 10 people in this network that everyone else will copy? Those are your first-10 target accounts. Discount, concierge-onboard, and over-invest in their success.
• Make reference a first-class GTM motion. Case studies, logo walls, and customer advisory boards aren't vanity marketing for early-stage B2B — they're the primary mechanism of market formation.
• Earn the right to expand before expanding. The impulse to "go broader" once you have five customers is almost always premature. You haven't saturated the first market; you're just uncomfortable selling inside it. Stay until the next ten deals are trivial, then expand.

The segmentation question

Moore's definition implies that segmentation is real, not just a slicing exercise. Two buyers in different reference networks are in different markets, and the correct response is usually either:

1. Pick one. Build the product, positioning, and GTM for one reference network at a time. This is the Crossing the Chasm playbook.
2. Treat them as separate product lines. Different messaging, different landing pages, different sales collateral. Sometimes different pricing. Not "one product, two use cases" — that's the pseudo-market mistake above.

Trying to serve two disconnected markets with one GTM motion is how most growth-stage startups break. The product can unify across segments (sometimes). The GTM almost never can.

See also

• MMRs, Neutralizers and Differentiators — what you classify as a differentiator often shifts between market segments; a feature that wins in one reference network may be irrelevant in another.
• 9x Effect — the 9x threshold is easier to clear in a narrow beachhead market where switching costs are lower and references are denser.