The question usually shows up the same way: growth has stalled, or it's time to finally get serious about paid media, or the founder has been running marketing personally for too long and something has to change. The instinct is to jump straight to a decision, post the job listing, call three agencies, or ask around for a fractional CMO. The more useful first step is figuring out which of the three actually matches the problem, because they are not interchangeable, and the market treats them like they are.
An agency solves an execution capacity problem
Agencies are built to execute a defined scope well, at a predictable monthly cost, without the overhead of a full-time hire. They're the right fit when the strategy is basically known, the business needs hands doing the work, whether that's media buying, SEO, or creative production, and there isn't a need for someone embedded daily in company strategy conversations.
Where agencies struggle is ambiguity. If the real question is "what should our growth strategy even be," an agency will still produce a strategy, but it will be shaped by their standard playbook and their incentive to keep the retainer running, not necessarily by a deep, embedded understanding of the business. That's not a knock on agencies; it's simply what the model is built for.
A full-time hire solves an ownership problem
A hire makes sense when growth has become core enough to the business that it needs someone who lives inside it every day, who can build institutional knowledge over years, and whose sole job is this company's growth rather than several clients' growth at once. The tradeoff is cost, both the salary itself and the ramp time before that person is fully productive, plus the risk that comes from depending on one person's specific skill set.
Hiring also assumes the business already knows what seniority level it needs. Hiring a mid-level marketer to define strategy, or a senior strategist to spend their week in ad platforms, both waste the hire's real strengths. Getting the level wrong is one of the most common and most expensive mistakes in this decision.
A fractional lead solves a leadership gap, not an execution gap
Fractional growth leadership exists for a specific, narrower situation: the business needs senior strategic direction, someone who can set the plan, evaluate channels, and make the calls a VP of Growth would make, but doesn't yet have the budget, the scale, or the certainty to justify that role full-time.
This is different from both of the other options. It's not execution capacity like an agency, and it's not a permanent embedded hire. It's senior judgment, applied part-time, often paired with an agency or a smaller internal team actually doing the day-to-day execution underneath that strategy. Used correctly, it's the option that most directly answers "we don't know what we don't know yet," because that's precisely the gap it's designed to close.
A simple way to sort it
- If the strategy is basically clear and the gap is hands to execute it: an agency.
- If growth is now core to the business and needs a permanent owner living inside it: a hire.
- If the real gap is senior direction and decision-making, not extra hands: a fractional lead.
These aren't permanent categories. A business might need a fractional lead for six months to build the strategy and hiring plan, then convert to a full-time hire once the role is well-defined enough to recruit for properly. Or it might run an agency for execution under a fractional lead's direction indefinitely, if that combination keeps working. The mistake isn't picking one over another, it's picking based on what's fashionable or familiar rather than what the actual gap in the business calls for.