I have watched this movie more than once: a founder hires a good agency, the agency does exactly what was asked, pipeline does not move, and everyone blames the agency. The missing piece was direction, not execution. Here is the whole decision, laid out with the research linked so you can check it.
What is the difference between a fractional CMO and a marketing agency?
An agency executes the campaigns you assign it and supplies specialist capacity you do not have in-house. A fractional CMO decides what those campaigns should be, owns priorities and budget, and answers for the results. The real question underneath is who owns marketing judgment: an agency is strongest when you know what needs doing, and a fractional CMO is strongest when nobody senior is deciding what should be done.
A fractional CMO
An agency
One fairness note before the data: good agencies do advise on strategy, and plenty of them are sharp at it. The distinction is not intelligence. It is decision rights. An agency recommends; somebody on your side still has to own priorities, budget, and the tradeoffs between them. When nobody does, that is where things break, and the research below shows exactly how.
Why do startup agency engagements fail?
Rarely because the agency is bad. In Setup’s 2025 client survey the top reasons clients ended agency relationships were delivery (61 percent), value (61 percent), and the agency not understanding the business (44 percent). And the BetterBriefs study of more than 1,700 marketers across 70 countries found only 5 percent of agencies say the strategic direction they receive in briefs is clear. The recurring failure is strategy missing on the client side of the relationship.
Unclear direction
Only 5 percent of agencies say brief strategy is clear, and 60 percent of marketers admit using the creative process to figure out their own strategy (BetterBriefs).
Business not understood
44 percent of clients cite it as a breakup reason. Only 3 percent of agencies see it in themselves (Setup 2025).
Delivery and scoping
61 percent of clients cite delivery. Agencies themselves name project scoping among their top operating challenges (Setup).
The churn math
Only 42 percent of digital agencies keep the average client past two years, and 24 percent lose the typical client inside one year (Promethean, 2026).
For fairness again: agency relationships are not doomed. The 2025 ANA and 4As tenure study found formal agency-of-record relationships now average about seven years. The fragile ones are precisely the digital retainers startups buy, and the difference is rarely the vendor. It is whether anyone on the client side owns the strategy the work is supposed to serve.
What does an agency do better than a fractional CMO?
Elastic execution capacity and specialist depth. ANA’s in-house agency research found that 92 percent of organizations sophisticated enough to run their own internal agencies still use external ones, mainly for bandwidth and for capabilities they do not employ. One fractional executive cannot supply a design team, a media buyer, and a lifecycle engineer. When you know what needs doing and the bottleneck is hands, an agency is the right buy.
This page is written by a fractional CMO, so that paragraph is the part my side of the market usually leaves out. I will go further: if your positioning is settled, your funnel is instrumented, and someone senior on your team can brief, judge, and redirect the work, you may not need me. Hire the agency. The order of operations below is for everyone else.
What is a “fractional CMO agency”?
A firm that bundles a senior fractional marketing leader with its own execution team under one contract. The same label also gets used for marketplaces that place independent fractional CMOs, so the term covers very different products at very different prices. Here are the models buyers encounter:
All prices are provider-published or marketplace-reported, not audited averages. The scopes differ too much to read this as a ladder: an hourly independent and a bundled team are different products.
One governance note on the bundled model: the same firm that recommends what you should buy also sells the fulfillment. That is not misconduct, but it is a reason to keep budget authority on your side of the table and to review whether the bundle still earns its keep. And for the record, I am the independent version: one senior operator, no bundled team to sell you, directing whatever mix of internal people, contractors, or agencies your stage needs.
Should you use a fractional CMO and an agency together?
Often, yes. The evidence-backed pattern keeps strategy close to the business while sourcing specialist execution externally: ANA found 92 percent of companies with in-house agencies still use external ones, and Deloitte’s global outsourcing survey of more than 500 executives calls balanced internal-external sourcing the future of talent strategy. The accountability chain matters: CEO to fractional CMO to agency. The leader directs the agency, never the reverse.
Diagnose before you buy
Understand the buying motion and the funnel first. First Round’s research puts diagnosis, positioning, and motion fit ahead of any channel decision.
Set direction and measurement
ICP, positioning, the business metric the work should move, and who has authority to change or stop it. This is what makes agency briefs land instead of drift.
Then buy the missing execution
Now the agency conversation is easy: you know exactly which capability you are buying, what it should produce, and how you will judge it.
Before signing an execution retainer, someone on your side should be able to answer:
- Who is the buyer, and what positioning are we testing?
- What is the sales or buying motion?
- Which business metric is this work supposed to change, and how will we measure it?
- What budget can we afford to lose while learning?
- Who has the authority to redirect or stop the work?
If you can answer these, hire the agency with confidence. If you cannot, the person who can answer them is what you are missing.
Not sure which one you need?
Thirty minutes. Tell me where your go-to-market motion is stuck and I will give you a straight read. If an agency is the better first buy for your situation, I will say so and tell you what to put in the brief. It happens more often than you would think.
Email Crys or compare the costs →