Do I Need a Marketing Agency, or One Senior Person Who Can Do the Work?

Short answer: Most companies that leave an agency are not short on capacity. They are short on someone who understands the business. In 2025, 61% of clients who ended an agency relationship cited delivery and value, and 44% said the agency did not understand their business. Changing vendors does not close that gap. Shortening the distance between strategy and execution does.

The tension: scale versus proximity

Agencies sell scale: a bench of specialists, production capacity, and coverage across channels and markets. Senior independent operators sell proximity: one accountable person close enough to the business to make judgment calls without a briefing chain.

Most hiring decisions treat the choice between them as a cost question. The evidence says it is a knowledge question.

What the data shows

Budgets are flat, and agency fees are the first line reviewed. Gartner's 2025 CMO Spend Survey of 402 marketing leaders found budgets holding at 7.7% of company revenue. Fifty-nine percent of CMOs said that is not enough to execute their strategy, 39% plan to cut agency budgets, and 22% said generative AI is already reducing their reliance on outside agencies. Budget pressure is forcing scrutiny of every layer that sits between spend and outcome.

Clients and agencies disagree about why relationships end. In Setup's 2025 Marketing Relationship Survey, clients named dissatisfaction with delivery (61%) and value (61%) as the top reasons for leaving, followed by "the agency did not understand our business" (44%) and dissatisfaction with strategic approach (41%). On the agency side, 75% believed budget cuts were the leading cause, and only 3% pointed to business understanding. Agencies are diagnosing a budget problem. Clients are describing a comprehension problem.

Work keeps moving closer to the business. The Association of National Advertisers reported in 2023 that 82% of its members had an in-house agency, up from 42% in 2008. The top benefits cited were cost efficiency and better brand knowledge. Yet 92% of those same companies still use external agencies. Companies are not abandoning outside help. They are re-sorting which work needs to sit close to the business.

The pattern: the proximity gap

None of these studies names it, but each one measures part of the same thing. I call it the proximity gap: the distance between the person who understands the business and the person doing the work.

In a layered delivery model that distance is structural. Strategy is set at one level, translated through account management, and executed at another. Every handoff sheds context. The 44% who said their agency did not understand their business are that loss, quantified.

It also explains why switching agencies so often disappoints. A new partner with the same structure reproduces the same gap, with a fresh onboarding cost on top.

What this changes

Diagnose the problem before you choose the vendor. If you cannot state your marketing strategy in two sentences, more hands will produce more activity and no more progress. That is a direction problem, and capacity will not solve it.

Buy proximity for judgment and scale for volume. Positioning, budget allocation, and measurement design depend on deep knowledge of the business. High-volume production and multi-market coverage depend on headcount. The 92% still using agencies alongside in-house teams shows the answer is rarely one or the other.

Ask who does the work in month three. The people in the pitch are not always the people on the account. Ask for names, seniority, and hours before you sign. The answer tells you how wide the gap will be.

The resolution

"Agency or consultant" is the wrong frame. The useful question is where your business needs proximity and where it needs scale.

A senior operator who sets the strategy and executes it closes the gap by design, within the limits of one person's capacity. An agency delivers volume, and the gap has to be managed deliberately. Neither model is superior. Each fails predictably when it is hired to do the other's job.

The question to ask: How many handoffs sit between the person who understands your business and the person building your next campaign?

If the answer is more than two, that is the conversation worth having. Reach out and we can map it.

Sources

Gartner, 2025 CMO Spend Survey. 402 CMOs and marketing leaders, surveyed February to March 2025.

Setup, Why Do Clients End Agency Relationships? 8 Years of Surveys. 2025 Marketing Relationship Survey results.

MediaPost, ANA: 82% of Members Now Have In-House Agencies. ANA study of 162 respondents, fielded February to March 2023.