Most content on this topic is written by consultants trying to convince you to hire a consultant, or by agencies trying to convince you to hire an agency. That's not useful. The honest answer is that both models have real advantages — and the right choice depends on what problem you're actually trying to solve.
Let's be specific.
What Agencies Are Actually Good At
An agency is a production operation. They have account managers, specialists, creative teams, and established processes for cranking through a defined scope of work. If you know exactly what you need — say, 20 paid search campaigns across three product lines, managed monthly — an agency can execute that at a cost and quality level that's hard to match with freelancers or in-house junior hires.
Agencies earn their fees when:
- You have a stable, validated strategy and need consistent execution
- You need volume output: regular content, ongoing paid campaigns, weekly reporting
- You don't need someone to question the strategy — you need someone to run the play
- You want a managed service where someone else owns the day-to-day operational load
The agency model also works well if you have an internal marketing lead who can direct the work. The agency becomes a specialist production arm. The internal lead sets direction and ensures quality. That's a functional setup.
Where Agencies Fall Short
Agencies are bad at figuring out what you should do. That's not a criticism — it's a structural reality. Their business model is based on billing hours against a defined scope. Discovery, diagnosis, and strategy questioning are slow and expensive to do properly. Most agencies will conduct a brief onboarding process, then start executing the playbook they already know.
If you don't have a validated strategy, hiring an agency means paying for execution of a strategy that may be wrong. You'll get polished output on a broken brief.
The other common failure mode: agency account management incentives are aligned with retainer renewal, not with you making good decisions. If your ads aren't working, the agency's first recommendation is usually to try a different ad approach — not to question whether paid ads are the right channel for where you are right now.
What a Consultant Is Actually Good At
A consultant's job is to figure out what the problem is and what to do about it. The deliverable is clarity and a decision — not ongoing execution.
Consultants are the right call when:
- You don't know why growth has stalled and need someone to diagnose it
- You're about to make a significant spend decision (new channel, new tool stack, new hire) and want someone to pressure-test it first
- You're switching strategies and need to know what to keep, what to cut, and in what order
- You have execution capacity (internal team or existing vendors) but poor strategic direction
A good consultant will tell you things that are uncomfortable. They'll tell you your current agency is running the wrong plays. They'll tell you the channel you're excited about isn't right for your stage. That's the job. If you want someone to validate what you've already decided, that's not consulting — that's approval-seeking.
The Questions That Actually Help You Decide
Before deciding between models, be honest with yourself about these:
Do I know what I need, or do I need someone to help me figure out what I need? If the answer is the former, an agency can probably execute it. If the latter, a consultant comes first.
Is my current strategy working and I just need more of it? If yes, agency. If no, consultant first — find out why before you scale.
Do I have internal marketing leadership? If yes, an agency as a production partner makes sense. If no, you need strategic direction before you need production volume.
What does "success in 90 days" look like? If it's a list of deliverables (campaigns live, content published, reports running), that's agency work. If it's a decision made with confidence (we know which channel to invest in, we know why our conversion rate is low), that's consulting work.
How much money am I putting at risk? The larger the spend downstream, the more it's worth paying for proper diagnosis upfront. Spending $3,000 on a consultant to validate a $50,000 annual media plan is good math. Skipping the diagnosis to save $3,000 and then running the wrong media mix for a year is not.
When You Might Need Both
The sequence that works best for most growing companies: consultant first, then agency.
Use a consultant to get clear on the strategy — what channels, what positioning, what offers, what funnel. Once that's documented and tested, bring in an agency to run the playbook. The agency now has a brief that's actually specific. They can execute against it. You can hold them accountable because the strategy is written down.
If you're not sure where to start, the Diagnostic is designed to answer exactly this question — what's working, what isn't, and what the highest-leverage next move is. If the output of that engagement is "you need execution help, not more strategy," I'll tell you that. Sometimes the right next step is hiring an agency with a specific brief, not continuing to work with me.
More on how I work at /work-with-me and /marketing-systems-consultant.
If you're further back than strategy and still working out your positioning, start with Fix Your Positioning Before You Run Another Ad. That's often the real issue.