The short answer: it depends on which problem you actually have. A fractional growth marketer gives you senior strategic ownership without a full-time salary. An agency gives you execution capacity across channels. Brands pick wrong when they hire for the model instead of the bottleneck, buying execution when they lack strategy, or buying strategy when nobody's left to do the work.

Here's the decision framework we'd use if we were in your seat.

What each model actually is

A fractional growth marketer is one senior operator working inside your business part-time, typically 10–20 hours a week. They own the growth strategy: which channels, which offers, what to test, in what order. Market rates typically run $3,000–$15,000/month depending on seniority and hours.

An agency is a team you rent. Media buyers, creatives, email specialists, usually specialised by channel. They execute against a brief. Pricing varies widely by scope and channel.

The core distinction: agencies do things for you. Fractional leaders decide what should be done.

The trade-offs, honestly

Fractional strengths: accountability sits with one person; strategy is built around your P&L, not a channel; cheaper than a $150K+ full-time hire. Fractional weaknesses: one person can't out-execute a team; you're buying hours, so execution depth is capped; quality varies enormously between individuals.

Agency strengths: immediate execution capacity; specialist depth per channel; established creative and reporting processes. Agency weaknesses: channel agencies are incentivised to grow their channel, not your blended profitability; strategy is often thin; you can become a small account in a big book.

Which model by revenue stage

Under ~$50K/month

Neither, usually. A full agency retainer eats margin, and a fractional marketer has too little budget to steer. Fix the fundamentals first (offer, landing page, email flows) with targeted freelance help.

$50K–$200K/month

This is the fractional sweet spot. Your bottleneck is almost always prioritisation, not headcount. One senior operator deciding where the next dollar goes beats three vendors optimising in isolation.

$200K–$500K/month

Hybrid. A fractional leader (or a strategy-first consultancy) setting direction, with an agency or freelancers executing the highest-leverage channels. At this stage the strategy/execution split becomes real and you can afford both.

The question to ask before either

Both models fail for the same reason: they're pointed at the wrong lever. An agency will happily scale your Meta spend while your email flows sit empty and your repeat-purchase rate leaks. A fractional marketer inherits whatever diagnosis you hand them.

That's why we'd argue the first purchase isn't a model. It's a diagnosis. Know which of your levers (paid, email, conversion, retention) is leaking the most revenue, then hire the model that fixes that lever.

If you want that diagnosis before committing to either path, that's exactly what our free 60-minute growth audit is: a live review of your numbers and a written, prioritised roadmap in 24 hours. You can hand it to a fractional marketer, an agency, or run it yourself.

FAQ

Is a fractional growth marketer cheaper than an agency?

Often comparable in monthly cost, but you're buying different things: strategic ownership vs execution capacity. Cheapest is irrelevant if it's pointed at the wrong bottleneck.

Can I use both?

Yes. Past ~$200K/month it's often the right answer: fractional leadership setting strategy, agency executing it. The failure mode is having two vendors and no one owning the blended P&L.