Fractional vs. Agency vs. Full-Time
The question isn't which model is best. It's which problem you actually have.
Founders usually frame this as a budget decision: what can we afford. That's the wrong first question. The right first question is what kind of problem this is, because fractional, agency, and full-time solve genuinely different problems, and picking based on price alone tends to produce the wrong hire dressed as the right budget.
What each is built for
The mistake most founders make is hiring an agency for a fractional problem. A rebrand gets delivered, it looks good in the handoff meeting, and six months later the company is back where it started, because the agency solved the deliverable and left, and nobody owned the ongoing decisions the deliverable assumed would keep happening.
The reverse mistake is hiring full-time too early. A company that hires a VP of Brand before it has product-market fit is often paying full-time compensation for a discovery-phase problem, one that changes shape every few months as the company learns what it's building. That kind of instability is exactly what a fractional engagement absorbs well, and exactly what a full-time hire tends to find frustrating.
A rough guide: if the deliverable has a clear end date, it's an agency job. If the function is ongoing but the company's shape is still changing, it's fractional. If the company knows what it is and needs someone to own that story at scale every day, it's full-time.
None of these is a permanent choice. Companies move through all three as they grow, and the honest version of this conversation, for a founder evaluating any of them, is naming the problem correctly before naming the budget.