One decides what to do. The other does it. Most growing companies need both, in that order.
Hire a fractional CMO when nobody senior owns marketing direction, budget and results. Hire an agency when you know what needs doing and need skilled hands to do it. If you hire an agency first, you pay skilled people to guess.
What each one does
| Fractional CMO | Agency | |
|---|---|---|
| Owns | Strategy, budget, team, results | Delivery of agreed work |
| Works on | What to do and why | How to do it, at volume |
| Typical scope | A few days a month, ongoing | Campaigns, content, ads, design |
| Reports to | The CEO or founders | The person who briefs them |
| Success looks like | Pipeline and revenue moving | Work shipped on time and on brief |
Signs you need a fractional CMO first
- Nobody can say which channel brings your best customers.
- Your agency asks you for direction and you don't have a good answer.
- You've changed agencies twice and the results look the same.
- The founder still approves every campaign.
Signs you need an agency
- You have a plan, a budget and a person who owns it.
- The team can't produce enough ads, content or design to keep up.
- You need a specialist skill for a season, such as paid social or video.
When you need both
The best setup I've seen is simple. A fractional CMO writes the plan, picks the agencies, briefs them and judges the work. The agency does what it does best. You pay for direction once and for execution where it counts.
Hire for the decision first. Then hire for the doing.
Questions people ask
Can a fractional CMO replace our agency?
Sometimes. If the work is small, a CMO with a few freelancers may be cheaper. If it's large, the CMO makes the agency better.
Who should brief the agency?
Whoever owns the results. With a fractional CMO, that's them.
What do they cost?
Read how much a fractional CMO costs for 2026 ranges.
