Founders get confused by this, and the confusion is understandable. Both titles involve an external marketing expert. Both get paid to help you grow. The job descriptions on the websites look similar. But the engagement models are meaningfully different, and picking the wrong one for your stage costs real money.
Here's a clear breakdown.
What a Fractional CMO Actually Does
A fractional CMO takes ownership of your marketing function — strategy and usually some execution — on an ongoing retainer. The key word is owns. They're responsible for the marketing org, including managing any internal or vendor team underneath them. They set quarterly priorities, hold the team accountable, report to you or the leadership team, and act as the senior marketing leader the company can't yet afford full-time.
Typical engagement structure: 1-3 days per week, on a monthly retainer, usually $8,000–$20,000/month depending on experience and hours. They're not a vendor. They're closer to a part-time executive.
Fractional CMOs make sense when:
- You have a marketing team (even a small one) that needs a leader
- Marketing has a defined budget and you need someone to allocate it and own results
- You're past early product-market fit and are now trying to build a repeatable engine
- You want continuity — someone deeply embedded in the business over 12–24 months
At roughly $8–12M ARR in B2B SaaS, most companies are starting to think seriously about this. They have a couple of marketing hires, some paid programs running, content being produced, but no one with CMO-level experience to synthesize it into a coherent strategy and hold the team to a plan.
What a Marketing Consultant Actually Does
A consultant is engaged for a defined scope of work. The deliverable is a specific output — an audit, a strategy document, a channel assessment, a funnel diagnosis, a positioning framework — not ongoing leadership of the marketing function.
Consultants don't manage your team. They don't hold recurring 1:1s with your marketing coordinator. They're not in your Slack at 9pm. They come in, do the work, deliver the output, and the engagement ends or rolls into the next defined project.
This is a feature, not a bug. The project-based model means the scope is contained, the costs are predictable, and you can get specialized expertise without a multi-month commitment.
Consultants make sense when:
- You need a specific question answered before making a significant decision
- You need an outside perspective on what's broken before you hire someone to fix it
- You don't have a marketing team yet and aren't ready to build one
- Your problem is diagnostic, not operational
At $2–5M ARR in B2B SaaS, the fractional CMO model is often premature. The marketing function is still founder-led or thin, and what's needed isn't someone to run a team — there's no team to run. What's needed is clarity on what's working, what to prioritize next, and what the actual marketing model should be. That's project-based consulting work.
A More Concrete Way to Think About It
Picture two companies:
Company A is at $3M ARR, two founders, no dedicated marketing hire. The CEO does most of the marketing themselves but it's not systematic. They generate leads but don't know which sources are driving closed deals. They're considering hiring a marketing coordinator.
They don't need a fractional CMO yet. They need a consultant to audit the current lead gen, identify which one or two things are actually driving revenue, and build a simple system before they hire anyone. Hiring a fractional CMO here means paying executive-level fees to lead a team that doesn't exist yet.
Company B is at $9M ARR, one marketing manager and two contractors, decent content program, paid search running but underperforming relative to spend. The CEO has pulled back from marketing but the marketing manager doesn't have strategic experience.
Company B needs a fractional CMO. There's a team to lead, budget to allocate, and a need for someone to set quarterly strategy and hold the org accountable to it. Bringing in a project consultant would give them a deliverable — but no one to implement it.
The Transition Point
Most B2B companies need consulting before they need a fractional CMO. The consultant helps you get clear on strategy, build a working model, and figure out what kind of marketing leadership you actually need. Some clients I work with conclude they need a fractional CMO after our engagement — and that's a good outcome.
The trap is hiring a fractional CMO before you have a strategy that's worth leading. You end up paying for leadership of a program that's still figuring out the basics.
If you're not sure which model fits where you are, the Diagnostic is a good place to start. It's a fixed-scope engagement with a specific output: a clear picture of what's working, what's broken, and what to do first. That output tells you whether your next hire is a consultant for another phase, a fractional CMO, or a full-time marketing lead.
More on how I approach this at /marketing-systems-consultant and /work-with-me.
If you're also thinking through broader B2B SaaS marketing strategy, that's covered here.