GTM Strategy
The answer has very little to do with your budget.
By Shannon Kearns, published 2026-08-20, 10 min read.
Should a startup hire a boutique product marketing consultant or a big GTM agency for a launch? Start with where you need the most help, not with the vendor. If your gap is strategy, foundations, or customer insight, hire a product marketing consultant. If your strategy is validated and your gap is execution volume, hire a GTM agency. Hiring an agency to build your strategy is the expensive version of this mistake.
I get asked this quite often by smaller companies. And it's never a straightforward answer. (These things rarely are.) But the variable isn't budget, which is what most companies think.
The answer depends on your business. So let's break down the most important factors that go into deciding who you should hire.
Here's what we'll cover:
Start here, not with the vendor. Almost every founder asks "consultant or agency" when the real question is which half of the work they're missing. There are two halves: the decisions, and the doing.
A product marketing consultant typically owns positioning and messaging for the product, and for the company too if you're early. They make sure your messaging is on point and get you ready to go out into the market.
A go-to-market agency owns the throughput. What happens after that work is done.
Sometimes, you find a product marketing consultant who also does GTM, or the reverse. The title doesn't really matter. What matters is what you need done. (Or what you think you need done.)
So before you open a single proposal, walk your own situation through these four questions:
If your gaps are in 1 through 3, you need a consultant. If your gap is 4, you're a better fit for an agency.
If you already have a strategy you are genuinely comfortable with, you've validated your ideal customer profile, you've done the research, then an agency can be a great call.
They will stand up advertising quickly, get you selling, and get your operational systems in order in a way one person simply cannot.
If you don't have the strategy, you are going to burn a lot of money paying an agency to build it.
They'll overcharge you for it. They're harder to get a hold of. And the strategy you get back tends to be the one that justifies the programs they were already planning to sell you.
An agency isn't the premium version of a consultant. Nor is the opposite true. They're solutions to very different problems.
Ask one question: is my bottleneck a decision I haven't made, or volume I can't produce? Hire the consultant for the first, the agency for the second.
But here's the catch: most founders are certain the decisions are already made, and in my experience about 8 out of 10 aren't.
I tread lightly saying that, because it sounds like an insult. It's not. But here's an example of what I mean.
Every founder I meet can describe their ideal customer. Far fewer can tell me which customer they would turn away. If you can't tell me that, you don't have the foundations in place to hire an agency. (Unless you want to pay them a boatload to figure that piece out for you.)
If you can't answer these four in one sentence each, you still have some decisions that need to be made:
(If you'd rather work through this live, I offer a free 60-minute launch assessment that covers exactly this.)
If those four are shaky and you hire an agency, they'll ask you these questions and still kick off. Which means you're potentially wasting a ton of money betting on shaky ground.
If those four are genuinely solid and you hire a consultant to make them, you've paid a senior person to hand you a document confirming what you already knew. (A good consultant would tell you that before you pay them!)
Consultants price by project or by fractional retainer. Agencies price by monthly retainer with a minimum commitment, usually six to twelve months. The structure is the part that should change your decision, because it determines what happens when you're wrong.
What I see in the market:
A consultant engagement that turns out wrong costs you the project fee and a few weeks. An agency retainer that turns out wrong costs you 6+ months.
One other thing to keep in mind: with an agency, the people in the pitch are rarely the people on your account. That isn't a scam, it's how the model works.
With consultants, you're getting the person, their brain, and their work.
Some smaller teams prefer working with a solo consultant with whom they can build a relationship. Others like the high-volume work that an agency can deliver.
It's all about what your company needs.
As I mentioned earlier, if you hire an agency too soon, you scale positioning that isn't right yet.
This is the single most common way I see launch budget get burned.
The pattern is consistent. The agency runs a discovery sprint, comes back with a brief that's a reasonable synthesis of what you told them, and starts executing. Six weeks in, the numbers are soft. The conversation becomes about creative and channel mix, because those are the levers the agency controls.
I've watched early stage companies blow through money only to learn their ICP was wrong.
An agency can execute a position. It's a bad (or extremely expensive) instrument for finding one.
Usually, you hire a consultant to make sure your strategy is right. Not to be a cheaper pair of hands. If you take one thing from this post, take that.
A GTM strategy or PMM consultant helps you make decisions. Specifically, they help you answer the tough questions you've maybe been ignoring.
To name a few:
Deciding on these things, and committing to them, can be challenging if you're inside the company. Not because founders aren't smart, but because everyone in the room has a stake in the answer.
That's where consultants shine. They bring an outside perspective and push forward key decisions.
Now, plenty of consultants execute too. For example, I do lifecycle marketing and customer onboarding. I can help with website pages. I can even support advertising.
Most good independents have a delivery side, too. (Here's what I actually do.) But they typically partner with people on the execution side.
If you want to move really fast, hire the consultant to set the strategy first. Then, go find an agency to deliver against a brief the consultant wrote. Oftentimes, consultants can even manage that agency relationship for you (I usually do, with my clients).
Here's the sequence that works best, doesn't slow you down, and keeps costs down:
You'll notice this isn't: consultant = good; agency = bad. Quite the opposite. It's about knowing what your business needs, where you feel confident, and what you have money for.
A consultant owns the decisions, an agency owns the throughput. The consultant's output is a small set of defensible choices about buyer, positioning, and story. The agency's output is programs running in market against a brief. If you don't have the brief yet, the agency has to invent one, and you're paying them to guess.
Most launch engagements are project-priced for a scoped piece of work with a defined end, or a monthly fractional retainer for ongoing support. The bigger difference from an agency isn't the number, it's the commitment. Consultant projects end. Agency retainers have minimum terms, usually six to twelve months.
Yes, if the launch requires decisions nobody internally has the authority or the distance to make. It's not worth it if your positioning is settled and what you need is hands. Be honest about which one you have, because the two engagements look similar on a proposal and feel completely different in month two.
Some can, and some do it well. The structural problem is that positioning requires telling a client no, and an agency's incentive is a longer retainer with more programs in it. Ask any agency pitching you positioning work who on their team has personally killed a use case a paying customer loved. The answer tells you a lot.
Fractional, usually, until you can describe what a full-time PMM would do every day for six months. Before that, the work is bursty (a launch, a repositioning, a pricing change) and a fractional person matches the shape of it. Hiring full-time too early gets you a talented person doing whatever nobody else picked up.
Ask them to walk you through a launch that underperformed and what they'd do differently. Anyone who's led more than a handful has one, and the specificity of the answer is the signal. Vague answers mean they've been adjacent to launches, not accountable for them.
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