You've built something good. Maybe even great. Your product works, your early customers love it, and you know there's a market out there waiting. But your marketing? It's not working. Growth is slower than it should be. You've tried a few things — maybe an agency, maybe some freelancers, maybe just doing it yourself between everything else. Nothing's quite clicked.

Sound familiar? You're not alone. This is the reality for most startups between seed and Series B.

The instinct at this point is usually one of two things: hire a full-time CMO, or throw more money at an agency. Both can work. But for most startups at this stage, there's a third option that makes a lot more sense.

The agency problem

Agencies aren't inherently bad. Some are genuinely excellent. But the model has a fundamental tension when it comes to startups: you need strategy, and they sell execution.

Most agencies run playbooks. They'll audit your channels, propose a content calendar, set up some paid campaigns, and send you a monthly report. The problem is that playbooks don't account for the messy reality of a startup — the pivots, the limited budget, the need to do more with less, the fact that your ICP might change three times in six months.

What you actually need is someone who understands your business deeply enough to make strategic decisions. Someone who can say "stop spending money on that channel" or "your positioning is wrong" or "you need to hire a content person before you do anything else." Agencies rarely do this, because their incentive is to keep running campaigns, not to question whether those campaigns should exist in the first place.

The full-time CMO problem

A good CMO solves the strategy problem. They sit inside your business, understand the nuances, and make the calls that need making. The issue is cost and timing.

A full-time CMO in the UK will cost you £150,000–£250,000+ in salary alone, before equity, benefits, and the time it takes to find the right person. For a startup burning through runway, that's a significant chunk of your budget going to one hire — before you've even started spending on the marketing itself.

There's also a maturity question. At the early stages, you might not have enough work to keep a senior marketing leader busy full-time. You need strategic direction and leadership, but perhaps only two or three days a week. Paying for five is wasteful.

Enter the fractional CMO

A fractional CMO gives you exactly what the name suggests: a fraction of a full-time CMO's time, at a fraction of the cost, with all of the strategic value.

Here's what that looks like in practice:

  • Strategic leadership — defining your marketing strategy, positioning, and go-to-market approach based on your specific situation, not a template
  • Team direction — leading your existing marketing team (or helping you hire one), setting priorities, and holding people accountable
  • Budget discipline — making sure every pound you spend on marketing has a clear purpose and a measurable outcome
  • Senior experience — someone who's seen what works and what doesn't across dozens of companies, bringing pattern recognition you can't get from a junior hire
  • Flexibility — scaling up or down as your needs change, without the commitment of a full-time senior hire

The key difference is that a fractional CMO is embedded in your business. They're not an outsider running campaigns — they're in your Slack, on your calls, in your board meetings. They understand the context, the constraints, and the opportunities in a way that an external agency never will.

When does it make sense?

A fractional CMO isn't right for every business. It works best when:

  • You've got product-market fit (or close to it) but marketing isn't keeping pace
  • You're between seed and Series B, with budget for marketing but not enough for a full-time C-suite hire
  • You've tried agencies or freelancers and the results have been inconsistent
  • Your founders are doing the marketing themselves and it's becoming unsustainable
  • You need senior-level strategic thinking, not just more hands executing tactics

If you're pre-revenue and pre-product, you probably need a cofounder with marketing chops, not a fractional CMO. If you're post-Series B with a team of 10+ marketers, you probably need a full-time CMO. The sweet spot is everything in between.

What to look for

Not all fractional CMOs are created equal. Some are consultants who rebrand themselves for the trend. Others are genuinely experienced marketing leaders who've chosen this model because it lets them do their best work across multiple companies.

Look for someone who:

  • Has actually built things — not just advised on them. Founders, former heads of marketing, people who've shipped campaigns and been accountable for results
  • Understands your industry — marketing a B2B SaaS product is fundamentally different from marketing a consumer app. Domain expertise matters
  • Is comfortable with ambiguity — startups are messy. You need someone who can operate without perfect data and make decisions with incomplete information
  • Will tell you what you don't want to hear — the value of an experienced CMO is their judgement. If they just agree with everything you say, you've hired a yes-person, not a leader

The bottom line

Your startup doesn't need more tactics. It doesn't need another agency running another set of campaigns. It needs marketing leadership — someone who can see the full picture, make strategic decisions, and turn marketing from a cost centre into a growth engine.

A fractional CMO gives you that leadership at a price point and commitment level that actually makes sense for where you are right now. It's not a compromise — it's the right tool for the job.

The best marketing isn't about doing more. It's about doing the right things, in the right order, for the right reasons. That requires strategy before tactics, and leadership before execution.