The Credence Gap: Why Saudi Agencies Should Choose a Sector, Not a Service

Strategic Essay | Prince Researcher

Abstract

Saudi Arabia's marketing and advertising market is growing and fragmenting at the same time. Most agencies still position by service. They offer strategy, media, content, and production to any client who will pay. This essay argues that service positioning is the weaker choice. Marketing is a credence good. Clients cannot evaluate the quality of the work before they buy it, and often cannot evaluate it after. In a developing market, buyer competence is still forming, which widens this evaluation gap. When clients cannot judge quality, they substitute a proxy they can read. Sector specialization is the strongest available proxy. It is legible before purchase, it is verifiable through industry peers, and it compounds with every client served. This essay introduces the Credence Gap, the distance between what a buyer can purchase and what a buyer can judge. It shows why the gap is wide in Saudi Arabia, and why a wide gap rewards sector focus over service breadth. The central argument is direct. In a market that cannot yet grade the work, the agency that names its sector earns trust that a generalist cannot.

Introduction

A founder in Riyadh needs a marketing agency. She interviews four of them. Each one offers the same services. Each promises strategy, social, media buying, and content. Each shows a portfolio that spans restaurants, clinics, real estate, and retail. She cannot tell them apart. She also cannot tell whether any of them will do good work, because she has never bought marketing before and has no way to grade it in advance.

This scene is common in a market that is expanding faster than its buyers are maturing. The Saudi marketing and advertising agency market sits in the low-to-mid billions of dollars and grows at roughly five to six percent a year, with digital spend climbing much faster (Mordor Intelligence 2026; Research and Markets 2025). Vision 2030, tourism, and the giga-projects are pulling budgets upward. Yet the agencies competing for those budgets look alike, because they describe themselves by function rather than by field.

There is a gap between the money entering this market and the buyer's ability to spend it well. Market analysts note that smaller Saudi firms still underuse agencies, in part because awareness of the benefits of outsourcing marketing is still developing (Research and Markets 2025). This is not a flaw in the market. It is a stage of its growth. But it changes what a client can and cannot assess, and it changes what an agency should sell.

This essay makes one claim. Agencies in Saudi Arabia should position by sector, not by service. The reasoning does not rest on branding advice. It rests on the economics of what marketing actually is, on how buyers behave when they cannot judge quality, and on how trust forms in relationship-based markets. The essay introduces a framework, the Credence Gap, to explain why sector focus wins where buyer competence is still forming.

Theoretical Framework

Three lenses explain the mechanism. Each one is applied to the agency problem directly.

Marketing is a credence good

Economists divide goods into three types (Nelson 1970; Darby and Karni 1973). Search goods can be judged before purchase. Experience goods can be judged after use. Credence goods cannot be judged with confidence even after they are consumed, because the buyer lacks the expertise to evaluate them. Medicine, law, accounting, and consulting all fall here. So does marketing.

When a client hires an agency, the agency acts as the expert who defines the problem and prescribes the solution. The client rarely knows how much work a campaign required, whether the strategy was sound, or whether a different approach would have performed better. Dulleck and Kerschbamer (2006) show that credence markets carry a permanent information asymmetry between expert and buyer. That asymmetry is the central fact of the agency business. It is also the source of its trust problem.

Specialization is a costly signal

When quality cannot be observed directly, buyers read signals instead (Spence 1973). A signal works only when it is costly to fake. Sector specialization is such a signal. An agency cannot credibly claim to be a healthcare agency, or a real estate agency, or a fintech agency, without accumulating the case studies, the vocabulary, and the sector relationships that back the claim. The cost of the signal is what makes it believable.

A generalist sends a weak signal. A list of every service offered to every industry tells the buyer nothing about fit. A sector claim tells the buyer something they can verify: this agency understands my field. In signaling terms, the specialist is legible and the generalist is noise.

Trust in the Gulf is relationship-based

Signals do not travel through a vacuum. They travel through networks. Granovetter (1985) shows that economic decisions are embedded in social relationships, and that trust flows through those relationships more reliably than through open markets. In the Gulf, this embeddedness is sharper. Business trust runs through personal connection and reputation, a structure studied under the concept of wasta (Hutchings and Weir 2006).

This matters for sector strategy. A specialist who serves one industry becomes known within that industry's network. Referrals concentrate. Reputation compounds inside a bounded community rather than dissipating across an open market. The generalist has no such community. The specialist is remembered because they belong somewhere.

Case Studies

Auditing: the specialization premium in a credence market

Auditing is a credence good in its purest form. A company cannot easily judge whether its audit was thorough, because judging the audit would require the very expertise the auditor was hired to supply.

Researchers tested what happens when auditors specialize by industry. Using data from the U.S. operations of the Big Four firms, they measured whether industry-specialized partners were paid and performed differently from generalists (Aobdia, Siddiqui, and Vinelli 2021). The finding was clear. Specialized partners commanded higher fees, even on simple work. They also produced fewer errors on difficult work. Most important for this essay, the specialization premium was largest where the information gap between client and auditor was widest, and it shrank when clients could assess quality more easily.

This reveals the core mechanism. In a credence market, specialization is priced as trust. It pays most precisely where buyers are least able to judge the work. That is the condition of a developing agency market, and it is the condition of Saudi Arabia today.

Vertical software: depth becomes a moat

Software offers a structural analogy, though it is not an agency business and should be read as a parallel rather than proof. Healthcare technology was once served by broad, general systems. Then companies chose depth over breadth (Tidemark 2025).

Epic went deep into a single vertical and became the record system for roughly half of large U.S. health systems, with near-zero customer loss. Jane took the opposite end of the same market and built a platform only for independent allied-health clinics, a segment that general tools served poorly. Both won by specializing. Buyers who could not assemble and integrate their own tools rewarded the provider who understood their exact workflow.

The lesson transfers to agencies. A client who cannot judge marketing quality, and cannot coordinate five separate specialists, is best served by one sector-fluent partner who offers full service inside a single field. Depth in the sector makes the breadth of services deliverable. This is the model the Saudi market needs, and it is the reverse of the current default.

Saudi Arabia: the natural laboratory for the Credence Gap

The Saudi market displays the exact conditions the framework predicts. Documentation of the market exists, but buyer maturity is still forming. Reports note that awareness of the value of agency outsourcing among smaller firms is still developing (Research and Markets 2025). Industry commentary for 2026 describes a shift toward accountability, specialisation, and vertical expertise, and a decline in scatter-shot advertising (Campaign Middle East 2026). Spending is concentrating in a defined set of sectors, including real estate, retail and consumer goods, fintech, tourism, and the giga-projects.

Before this shift, agencies competed broadly and undifferentiated. The change now underway rewards focus. The framework explains why. Where buyer competence is still forming, the evaluation gap is wide. A wide gap raises the value of any signal the buyer can read. Sector specialization is that signal. Saudi Arabia is not an exception to the credence logic. It is the clearest place to observe it.

Synthesis Framework: The Credence Gap

The essay's contribution is a single concept that explains the choice.

The Credence Gap is the distance between what a buyer can purchase and what a buyer can judge. In a mature market, buyers know how to evaluate marketing, so the gap is narrow. In a developing market, buyers are still learning, so the gap is wide. The width of the gap is the strategic variable. It determines how a client chooses, and therefore how an agency should position.

The mechanism inside the gap is proxy substitution. When a buyer cannot assess quality, they do not stop deciding. They substitute a proxy they can read. They choose the signal that feels safest. Sector specialization dominates the available proxies for four reasons.

First, it is legible before purchase. A client recognizes sector fit without needing expertise. Second, it is verifiable through peers. In a relationship-based market, a specialist's reputation travels through the industry's own network. Third, it compounds. Each client in a sector lowers the cost and raises the quality of serving the next. Fourth, it is defensible. A generalist can copy a service list overnight. A generalist cannot copy years of sector depth.

The framework also states its own limits. The Credence Gap rewards sector focus under three conditions. The gap must be wide, which holds in developing markets and fades as buyers mature. The sector must be deep enough to sustain a full-service team, which points toward high-spend fields rather than thin ones. And the advantage is strongest for judgment-heavy work such as strategy, positioning, and creative, and weakest for horizontal services such as development or production, where the deliverable barely changes across industries.

The reframe is the point. The question is not specialist versus generalist. The question is legibility. In a wide Credence Gap, the agency the market can read is the agency the market will trust.

Conclusion

Saudi Arabia has built a marketing market faster than it has built marketing buyers. That is the natural order of rapid growth, and it is not a weakness. But it creates a specific condition. Clients are spending more than they can yet evaluate. In that condition, the agency's task is not to prove that it can do everything. The task is to give the buyer a signal they can read.

Sector focus is that signal. It converts the buyer's inexperience from an obstacle into a design condition. A generalist asks the client to trust a promise the client cannot test. A specialist offers a claim the client can recognize, verify through peers, and remember. The specialist does not win because they are better at marketing. They win because they are legible to a buyer who cannot yet grade the work.

This is why the choice matters now rather than later. The Credence Gap is widest early in a market's development, which is where Saudi Arabia sits. As buyers mature, the gap will narrow, and the pure signal value of specialization will fall. The agencies that claim their sectors during the wide-gap years will hold the reputation, the networks, and the compounding depth that late entrants cannot assemble. Position is easier to take than to recapture.

The service list is the weakest thing an agency owns, because every competitor owns the same one. The sector is the strongest thing an agency can own, because no competitor can own it twice.

In a market that cannot yet grade the work, the agency that names its sector is the agency the market can trust.

References and Further Reading

Academic

• Aobdia, D., Siddiqui, S., and Vinelli, A. (2021). Heterogeneity in Expertise in a Credence Goods Setting: Evidence from Audit Partners. Review of Accounting Studies, 26(2), 693–729.
• Darby, M. R., and Karni, E. (1973). Free Competition and the Optimal Amount of Fraud. Journal of Law and Economics, 16(1), 67–88.
• Dulleck, U., and Kerschbamer, R. (2006). On Doctors, Mechanics, and Computer Specialists: The Economics of Credence Goods. Journal of Economic Literature, 44(1), 5–42.
• Granovetter, M. (1985). Economic Action and Social Structure: The Problem of Embeddedness. American Journal of Sociology, 91(3), 481–510.
• Hutchings, K., and Weir, D. (2006). Guanxi and Wasta: A Comparison. Thunderbird International Business Review, 48(1), 141–156.
• Nelson, P. (1970). Information and Consumer Behavior. Journal of Political Economy, 78(2), 311–329.
• Spence, M. (1973). Job Market Signaling. Quarterly Journal of Economics, 87(3), 355–374.

Institutional and Industry

• Mordor Intelligence (2026). Saudi Arabia Marketing and Advertising Agency Market.
• Research and Markets (2025). Saudi Arabia Marketing and Advertising Agency Market, Market Share Analysis, Industry Trends and Growth Forecasts, 2025–2030.
• Tidemark (2025). Healthcare, The Ultimate Vertical Market. Vertical SaaS Knowledge Project.

Journalism

• Campaign Middle East (2026). 2025 vs 2026: Evaluating Marketing and Advertising in Saudi Arabia.

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