How a Business Directory Differs From a Marketplace

A business directory and an online marketplace are often spoken of in the same breath, and a business deciding where to invest its attention can be forgiven for treating them as versions of one thing. They are not. They are two distinct kinds of intermediary, built on different logics, earning their money in different ways, and leaving a business in different relationships with its customers. The confusion is understandable, because both sit between buyers and sellers and both promise to help a business be found; but the difference between them is real and consequential, and a business that grasps it will make better decisions about both. This article sets out what a directory does, what a marketplace does, where exactly the line between them runs, why the middle ground has become genuinely blurred, and what all of this means for a business deciding which to care about.

As elsewhere in this series, claims drawn from peer-reviewed research — here, principally the economics of platforms and two-sided markets — are cited by author and year and listed at the end; observations about current practice rest on industry reporting and are identified where they occur.

Two kinds of intermediary

The useful starting point is what the two have in common, because the shared ground is what makes the distinction worth drawing. Both a directory and a marketplace are intermediaries: both stand between a buyer and a seller, and both are, in the language of the economics literature, two-sided platforms of the kind analysed by Rochet and Tirole (2003) and by Armstrong (2006) — businesses on one side, buyers on the other, the platform deriving its value from bringing the two together. Where they part company is in what, precisely, they intermediate. A directory intermediates discovery: it helps a buyer find a business, and then steps back. A marketplace intermediates the transaction itself: it helps a buyer find a business and then carries the dealing between them — the order, very often the payment, sometimes the fulfilment — within its own walls. The whole of the difference grows from that single distinction, and the sections that follow trace it through its consequences.

It helps to have a plain pair of pictures in mind before the detail. A directory is like the classified pages of an old newspaper, or the recommendation of a knowledgeable neighbour: it tells a buyer who exists and how to reach them, and then the buyer goes off and deals with that provider directly, on whatever terms the two of them settle between themselves. A marketplace is closer to a large department store that sells the goods of many suppliers under its own roof and its own name: the buyer chooses an item, but deals with the store, pays the store, and is protected by the store, while the individual supplier stands behind the counter rather than face to face with the buyer. Both arrangements connect buyers to sellers, and both are genuinely useful, but the buyer’s experience of them differs at the root — in the first the buyer ends the encounter in a relationship with the provider, in the second in a relationship with the platform — and that single difference, traced patiently through its consequences, accounts for nearly everything else that distinguishes the two.

What a business directory does

A business directory’s work ends, in the main, where the transaction begins. It gathers businesses, organizes them by what they do and where, and presents them so that a buyer can find and compare the providers relevant to a need — the function the other articles in this series have described in detail. When the buyer has found a provider, the directory’s role is essentially complete: the buyer then contacts that business directly, and whatever follows — the enquiry, the quotation, the negotiation, the payment, the work itself — happens between the buyer and the business, off the directory entirely. The directory facilitated the meeting; it does not sit in on the deal.

This shapes everything else about a directory, including how it earns its income. Because a directory does not handle transactions, it cannot take a share of them, and so it is paid in other ways: by the fees businesses pay for a listing or for a more prominent one, by advertising, by subscriptions, and sometimes by a charge for each enquiry or lead it passes to a business. The buyer, typically, pays the directory nothing. This revenue model has a consequence worth marking, because it bears on the comparison with the marketplace: a directory’s income depends on businesses choosing to be listed, not on how much those businesses sell, and so a directory’s commercial interest is in being a place businesses want to appear — which usually means being a place buyers find useful — rather than in the volume of any particular transaction. The directory leaves the business in direct possession of its own customer relationship, and earns its keep from access rather than from a cut.

What a marketplace does

A marketplace begins where a directory ends. It too helps a buyer find a business, but it does not then step back; it carries the transaction inside its own system. On a marketplace, a buyer typically places the order, makes the payment, and receives the platform’s guarantees without ever leaving the platform, and in many marketplaces the platform also handles, or tightly governs, the fulfilment — the shipping of a good, the scheduling of a service, the release of payment once the work is confirmed done. The familiar examples span goods and services alike: the large retail marketplaces through which independent sellers reach buyers, the platforms for short-term accommodation and for rides, the marketplaces for freelance work and for local home services. What unites them is not what they sell but that the deal itself happens on the platform.

This too shapes how the platform earns its income, and here the contrast with the directory is sharpest. Because a marketplace intermediates the transaction, it can take a share of it, and a commission on each completed transaction is the characteristic marketplace revenue model. That single fact pulls a marketplace’s incentives in a particular direction. A platform paid a percentage of every sale has a direct interest in the volume and value of sales, and therefore in keeping the buyer transacting within the platform rather than slipping outside it; it has reason to hold the customer relationship itself, since a buyer who is loyal to the marketplace is worth a stream of commissions, while a buyer who merely discovered a seller and then left is worth one. A marketplace, accordingly, tends to position the individual business as a supplier within the platform’s relationship with the buyer, rather than as the holder of its own. This is not a criticism of marketplaces; it is simply the logic of the model, and a business needs to see it clearly.

Where the line runs

The locus of the transaction

The clearest way to tell a directory from a marketplace is to ask a single question: where does the transaction happen? If a buyer, having used the platform to find a business, then deals with that business directly — contacting it, agreeing terms, paying it — the platform is functioning as a directory, however it describes itself. If the buyer instead orders, pays, and is protected within the platform, the platform is functioning as a marketplace. Everything else in this comparison is, in a sense, a consequence of this one fact, and a business uncertain about what a given platform actually is can usually settle the matter by tracing where the money and the agreement change hands.

Revenue and incentives

From the locus of the transaction follows the revenue model, and from the revenue model follow the incentives. A directory, unable to take a cut of a transaction it does not touch, is paid for access — listings, advertising, leads — and so its interest lies in being a place businesses want to be and buyers find useful. A marketplace, taking a commission on each transaction it carries, has its interest tied directly to transaction volume, and therefore to keeping buyers transacting on the platform. The reason this matters to a business is that it predicts how each platform will behave toward it. A directory has comparatively little reason to interpose itself between a business and that business’s customers; a marketplace, whose revenue depends on remaining in that position, has every reason to. Bakos (1997), on the economics of electronic intermediaries, and the platform literature more broadly, make the general point that an intermediary’s behaviour follows its revenue model, and the directory and the marketplace are a clean illustration of it.

The relationship the buyer ends up with

The third place the line shows itself is in who, at the end, holds the customer relationship. When a buyer finds a business through a directory and then deals with it directly, the relationship that forms is between the buyer and the business: the business knows its customer, can serve them again, and is not dependent on the directory for the next encounter. When a buyer transacts through a marketplace, the relationship that forms is, in large part, between the buyer and the marketplace; the business is a supplier fulfilling an order the platform took, and the buyer’s loyalty, such as it is, tends to attach to the platform. This is the deepest of the differences for a business owner, because it concerns ownership of the thing a business most needs to own — its access to its own customers. A directory leaves that access with the business. A marketplace, by the logic of its model, tends to gather it to the platform.

Table 1. Business directory and marketplace compared

Hybrids and the blurred middle

Having drawn the line firmly, honesty requires admitting that a great many real platforms sit somewhere along it rather than cleanly on one side. The blurring runs in both directions. Directories have steadily added transactional features: a directory that began as a place to find a business may now also let a buyer book an appointment, request a quote through the platform, or message a provider within it, and each such feature moves the directory a step toward the marketplace. Platforms for local services are the clearest case — several began essentially as directories of providers and have, over time, drawn more of the transaction inside themselves, until what was a directory has become, in function, a marketplace. The movement happens in the other direction too, less often, when a marketplace adds discovery and comparison features that make it useful for browsing as much as for buying.

The blurred middle does not undermine the distinction; it makes the distinction more useful, because the way to navigate the middle is precisely to apply the test set out above rather than to trust the label. A platform that calls itself a directory but takes a commission on bookings made within it is, in the respect that matters, behaving as a marketplace, and a business should expect it to behave according to the marketplace logic of incentives and customer ownership. A platform’s self-description is a marketing choice; where its transactions happen, and how it is paid, are facts, and the facts are what a business should read. The spectrum is real, but the question that locates any platform on it — where does the transaction happen, and who is paid from it — is the same question throughout.

How each handles trust and risk

A buyer dealing with a business they have not used before faces a risk — that the work will be poor, that a payment will not be honoured, that the thing promised will not be the thing delivered — and the two kinds of platform handle that risk in characteristically different ways. The difference is worth setting out, because it shapes what each platform can credibly offer a nervous buyer, and therefore what kind of business each can help. A marketplace, because it sits inside the transaction, can manage the risk directly. It can hold a payment until the buyer confirms the work was done; it can offer a guarantee or a refund backed by the platform itself; it can suspend or remove a supplier whose buyers are consistently disappointed. The marketplace, in effect, lends the buyer its own assurance and asks the buyer to trust the platform rather than to trust an unknown supplier — which is a large part of why a buyer will deal, through a marketplace, with a business they have never previously heard of.

A directory cannot do any of this, because it does not touch the transaction, and so it addresses the buyer’s risk by other and less direct means. It can verify that a listed business is real and reachable; it can apply criteria of inclusion that keep the obviously unsound out; and it can carry the reviews of past customers, so that the buyer judges a provider on an accumulated public record rather than blind. But the assurance a directory offers is information about the business, not a guarantee standing in front of it: the buyer who proceeds is still entering a direct relationship with the provider and bearing the residual risk of it themselves. This is a genuine difference in what the two can promise. The marketplace can say, in effect, deal with anyone here and we will stand behind it; the directory can only say, here is what is known about this provider, and the judgement, and the risk, remain yours. Neither stance is better in the abstract — the marketplace’s assurance has a price in commission and in a ceded relationship, the directory’s independence has a price in residual risk carried by the buyer — but a business should know which kind of comfort a given platform is able to extend to the buyer it hopes to win, because that, as much as anything, determines which buyers the platform can deliver.

What each platform comes to know

A second difference that a business rarely weighs, and should, concerns what the platform itself learns. Because a marketplace carries the transaction, it sees the transaction, and over time it accumulates a detailed record: what sold and what did not, at what price, to which buyers, with what rate of repeat purchase, against which competing suppliers, with what seasonal pattern. This information is a real asset, and it belongs to the platform rather than to the business whose sales generated it. A directory, sitting outside the transaction, learns far less — it may know that a buyer viewed a listing or requested contact details, but it does not see the deal, the price, or the outcome — and so it accumulates no comparable record of any business’s trade.

The asymmetry matters for two reasons a business owner should hold in view. The first is that a marketplace can use what it learns, and not always in the supplier’s interest: a platform that sees which products sell well is a platform that knows where it might profitably compete itself, or which suppliers it can treat as interchangeable, or how to arrange its own display to its own advantage. The second reason is subtler and concerns the business’s knowledge of itself. A business that sells chiefly through a marketplace may find that its richest information about its own customers — who they are, what they buy, why they come back — sits with the platform rather than with the business, so that the business is, in a quiet way, renting access not only to demand but to the understanding of its own market. A directory leaves that understanding with the business, for the simple reason that it never had it to take. This is not an argument against marketplaces, which a business may have excellent reasons to use; it is a cost that belongs on the scale when the choice is being weighed, and it is easy to leave off precisely because, unlike a commission, it is never itemized on any statement.

Which one a business should care about

It would be a mistake to end on the implication that a business must choose between the two, or that one is simply better. Directories and marketplaces are not substitutes; they do different work, and a given business may have good reason to use both, one, or neither. The directory is the right instrument when a business wants to be discovered while keeping its own customer relationships and conducting its own dealings on its own terms — which describes a great many service businesses, professionals, and local trades. The marketplace is the right instrument when the access to demand that a platform controls is worth the commission and the ceded relationship — which can be a sound trade for a business that could not otherwise reach those buyers at all, or for which the platform’s transactional machinery genuinely lowers cost or risk. The decision is a real one, with real trade-offs on each side, and it should be made with the differences of this article in view: a business choosing a marketplace should know it is buying access to demand at the price of a commission and a measure of its customer relationship, and a business choosing a directory should know it is buying discovery while keeping the dealing, and the customer, its own.

Concluding remarks

A business directory and a marketplace are both intermediaries between buyers and sellers, and that shared description is the source of the common confusion between them; but they intermediate different things, and the difference is not a detail. A directory intermediates discovery and then steps back, leaving the transaction, and the customer relationship, with the business; it is paid for access, and its incentives run toward being useful enough that businesses want to be listed. A marketplace intermediates the transaction itself, carrying the deal and often the customer relationship within its own walls; it is paid a commission, and its incentives run toward transaction volume and toward keeping the buyer its own. Many real platforms sit between these poles, and the way to place any of them is to ask where the transaction happens and who is paid from it, rather than to trust what the platform calls itself. For a business, the practical value of the distinction is clarity about what is being traded: discovery with independence, in the case of the directory, or access to demand at the cost of a commission and a measure of ownership, in the case of the marketplace. Both can be sound choices; they are simply not the same choice.

Future developments

The blurring described above is likely to continue, and a business should expect the labels to become, if anything, less reliable as a guide than they are now. Directories will keep adding transactional features because each one raises the value the platform can capture, and the pressure to move from being paid for access toward being paid for transactions is a steady one. The likely result is not that the directory disappears into the marketplace but that more platforms occupy the middle, combining discovery with some degree of transactional involvement, and that the clean examples at either pole become relatively rarer. This makes the test in this article more useful over time rather than less: as the labels blur, the questions — where does the transaction happen, who holds the customer relationship, how is the platform paid — become the only dependable way to know what a platform actually is and how it will behave. A business that carries those questions, rather than a fixed list of which platforms are directories and which are marketplaces, will be equipped to judge platforms that do not yet exist.

References

Armstrong, M. (2006). Competition in two-sided markets. The RAND Journal of Economics, 37(3), 668–691.

Bakos, J. Y. (1997). Reducing buyer search costs: Implications for electronic marketplaces. Management Science, 43(12), 1676–1692.

Hagiu, A., & Wright, J. (2015). Multi-sided platforms. International Journal of Industrial Organization, 43, 162–174.

Rochet, J.-C., & Tirole, J. (2003). Platform competition in two-sided markets. Journal of the European Economic Association, 1(4), 990–1029.

Stigler, G. J. (1961). The economics of information. Journal of Political Economy, 69(3), 213–225.