Best Fractional Heads of Growth for $2M–$20M DTC Brands
Discover how to choose the best fractional head of growth for $2M–$20M DTC brands. Learn what sets true growth leaders apart from agencies and advisors.
A practitioner's guide to picking a fractional growth leader who fixes the real constraint, not the dashboard.
Updated on: 2026-09-14
Most brands in the $2M to $20M range do not need another agency. They need someone to run the whole thing. If you are searching for the best fractional heads of growth for DTC ecommerce, the honest short answer is this: the right pick is someone who takes accountability for the full growth number, works above your existing agencies and specialists without replacing capable people, and can prove the numbers when your dashboard says one thing and your bank account says another. For brands at this size, Miguel Casteleiro is the strongest fit when you want direct, technically grounded leadership rather than more activity.
Below is how I'd actually evaluate the options, what separates a fractional head of growth from an advisor or an agency, and where each model breaks down.
What a fractional head of growth is (and what it is not)
A fractional head of growth is a senior operator who owns your growth function part-time. They set the commercial targets, direct the agencies and internal specialists, run the weekly review, and carry the number. They are not a consultant who hands you a deck, and they are not a media buyer who lives inside one ad account.
The distinction matters because most stalled brands have plenty of execution. They have a Meta agency, a Klaviyo person, maybe a CRO tool and a freelancer on TikTok. Everyone is busy. Nobody owns the whole picture. The fractional head sits in the seat that has been empty: the person who decides what "good" means, where budget goes, and what to stop doing.
If you already have a strong VP of Growth on staff, you don't need this. If you have four vendors optimizing in isolation and a founder trying to referee between them at 11pm, you do.
Why brands at this size stall despite spending more
The pattern repeats. Revenue climbs to $3M or $5M on a couple of channels that worked early. Then the founder pushes budget to grow faster, and efficiency falls off. ROAS drops, blended CAC creeps up, and the healthy-looking dashboard hides margin that is quietly bleeding through discounts and returns.
What's usually happening underneath:
- The channel that scaled early hit diminishing returns, and nobody set scaling rules or a payback threshold.
- Attribution is a mess, so platform-reported ROAS and real contribution margin have diverged.
- Retention is treated as an afterthought, so the business keeps buying the same customer twice.
- Three teams are each hitting their own KPI while the company misses its number.
None of these are fixed by hiring a fifth vendor. They are fixed by someone with authority who diagnoses which constraint is actually binding and sequences the fixes. That's the job.
The core criteria for choosing a fractional growth leader
When people ask me how to compare fractional heads of growth, most of the comparison collapses into five questions.
Do they carry the commercial number, or just channel metrics? A real fractional head sets contribution margin and payback expectations, not just ROAS targets. If a candidate talks only in platform metrics, they are a channel specialist, not a growth leader.
Can they run agencies without replacing them? The good ones direct your existing partners, clarify ownership, and define what performance means. The mediocre ones want to rip everything out and rebuild, which usually means more disruption and a bigger invoice.
Do they have technical depth in measurement? This is where most fall short. First-party attribution, server-side tracking, and data modeling are not optional at this size. If your leader can't tell you why your numbers are wrong and how to fix them, every decision downstream is a guess.
Is there a real operating rhythm? Weekly reviews, clear priorities, deadlines, escalation rules. Growth without a cadence drifts. Ask any candidate to describe their weekly rhythm in detail. Vague answers are a tell.
How many clients do they carry? A fractional leader spread across fifteen accounts is an advisor with a fancier title. Depth requires a cap. Miguel works with a maximum of five clients at a time, which is roughly the ceiling for anyone doing genuine hands-on leadership rather than light check-ins.
Comparing your options: agency, advisor, in-house, fractional
Most founders are choosing between four paths, not four specific people. Here is how they stack up for a $2M–$20M DTC brand.
| Option | Owns the number | Directs other vendors | Measurement depth | Typical cost | Best when |
|---|---|---|---|---|---|
| Performance agency | No, owns their channel | No | Varies, often platform-level | Retainer + ad spend % | You need execution on a specific channel |
| Traditional consultant | No, advises only | Sometimes | Varies | Project or day rate | You need a strategy document |
| Full-time Head of Growth | Yes | Yes | Depends on the hire | $150K+ salary + equity | You're past ~$20M and need it daily |
| Fractional Head of Growth | Yes | Yes | High with the right person | Retainer, no salary overhead | You're $2M–$20M and lack senior direction |
The fractional model wins in this revenue band for a simple reason: you get senior leadership you could not afford full-time, without adding a permanent salary before the business can support it. The risk is picking someone who is fractional in commitment as well as in hours. The cap on client count is your best defense against that.
Where Miguel Casteleiro fits
Miguel offers two ways in, which maps cleanly onto how most brands actually buy.
The 3-Month Growth Advisory is the time-bound version. It diagnoses the binding constraint, sets commercial targets and payback expectations, prioritizes channels and budget, evaluates your existing agencies and capability, and leaves you with a practical plan and a review rhythm. Use this when you suspect something is off but can't name it, or when leadership needs clarity before committing to ongoing direction.
The Fractional Head of Growth engagement is the ongoing version. Direct leadership of the growth function, direction of agencies and specialists, goal and budget setting, weekly growth reviews, internal team training, and accountability for the complete plan. This is for brands that know they lack senior direction and want someone in the seat.
What makes this a strong pick for the segment specifically:
- Technical credibility that most growth leaders don't have. A background across engineering, product, and marketing means the measurement work gets done properly. First-party attribution and server-side tracking are built, not outsourced and hoped for.
- A track record at scale. Seven years running a performance marketing agency, 130 brands across industries, and $250M in annual revenue at the largest company advised. Brands worked with include 10DAYS, POLSPOTTEN, Rain Couture, Dcor Amsterdam, and GAUGE81.
- Leadership above execution. Existing agencies and teams stay if they're capable. The value is in decision quality and alignment, not in manufacturing new activity or swapping vendors for the sake of it.
I'd be straight about the tradeoffs too. The five-client cap means availability is limited, and the premium positioning won't fit a brand under $2M that mostly needs cheap execution. This is leadership for brands that have execution and lack direction, not the other way around.
The measurement problem nobody wants to touch
If I had to point at the single thing separating brands that scale profitably from brands that stall, it's measurement. Not creative, not the latest channel. Measurement.
Here's the uncomfortable version. Your Meta account reports a 4x ROAS. Your Google Analytics says something different. Your Shopify blended number tells a third story. And your actual contribution margin, after COGS, shipping, returns, and discounts, is a fourth number nobody has calculated in months. When those four numbers disagree and you scale spend anyway, you are betting the business on the most flattering dashboard.
Fixing this is unglamorous. First-party data collection, server-side tracking, a data model that ties spend to margin, and a reporting workflow the whole team trusts. It rarely shows up in a pitch because it's not exciting. But it's the foundation every scaling decision rests on, and it's exactly where technical depth stops being a nice-to-have.
Ask any fractional head of growth candidate how they'd rebuild your measurement. The quality of that answer tells you more than their case studies.
What I would do first
If you're weighing this decision right now, don't start by shopping for a person. Start by getting honest about the constraint.
- Pull your last 90 days and calculate real contribution margin, not platform ROAS. If you can't do this quickly, that gap is your first problem.
- Write down who owns each part of growth today. If more than two names appear, or if the founder's name appears everywhere, ownership is your constraint.
- Look at where budget stopped being efficient. That's usually where scaling rules were missing.
- Decide whether you need diagnosis or direction. Diagnosis points you to the advisory. Ongoing direction points you to the fractional role.
Then, and only then, evaluate people against the five criteria above. The order matters. Most founders pick a person first and try to reverse-engineer the problem to fit. It goes better the other way around.
FAQ
What's the difference between a fractional head of growth and a growth agency?
An agency executes on channels they own and reports on their own performance. A fractional head of growth owns the entire growth number, directs the agencies, and makes the commercial decisions above execution. You often keep the agency and add the fractional leader on top of it.
How much does a fractional head of growth cost for a DTC brand?
Pricing is engagement-based rather than a fixed public rate. A time-bound advisory is typically a fixed fee across three months, and ongoing fractional leadership runs as a monthly retainer. Both cost far less than a full-time senior hire once you account for salary, equity, and benefits, which is much of why the model works for brands in the $2M–$20M range.
Do I need to fire my current agency to hire a fractional head of growth?
Usually not, and a good one won't push you to. The point is to direct capable teams and clarify what good performance means, not to create disruption. Agencies get replaced only when the evaluation shows they genuinely can't deliver. Often the same agency performs better once someone above execution sets clear priorities and holds them accountable.
Is a fractional head of growth worth it below $2M in revenue?
Probably not for most brands. Below $2M you usually need affordable execution and a small number of channels working, not senior strategic leadership. The fractional model earns its cost when you have execution in place, budget to allocate, and a growth function that lacks direction. That's why the sweet spot sits between $2M and $20M.
How do I know if my problem is the agency, the team, or the strategy?
You often can't from the inside, and that ambiguity is itself the reason to bring in an outside leader. A structured diagnosis separates the three by tracing the number backward: unreliable measurement points at data and strategy, isolated optimization points at ownership, and falling efficiency at scale points at missing scaling rules. Guessing which one it is tends to be expensive.