Every few weeks a founder asks me some version of the same question: should we get a fractional CMO or a marketing agency? It is almost never a question of which is better. It is a question of what is missing in the company right now. Sometimes that is direction. Sometimes it is people to do the work. At post-seed it is usually both, and buying them separately is the expensive way to find out.
What follows is the comparison I wish someone had handed me: cost, speed, who is accountable for what, fit by stage, a six-question scorecard, and the third option most post-seed B2B SaaS teams end up needing anyway.
The short answer
Hire a fractional CMO when you do not know what marketing should do next and nobody senior owns the answer. Hire an agency when you know exactly what to run and simply lack the people to run it. If you are post-seed with product-market fit, a founder still carrying sales, and a junior or nonexistent marketing team, you usually need both, and buying them separately is the expensive way to get there.
What a fractional CMO does for a B2B SaaS company
A fractional CMO is a senior marketing executive who works with you part-time, usually a fixed number of days per month, to set direction and lead the function. In practice that means owning positioning and messaging, defining the ideal customer profile, designing the go-to-market strategy, choosing channels and budgets, building the reporting that ties marketing to pipeline, and managing whoever executes, whether that is an in-house team, freelancers, or an agency.
What a fractional CMO usually does not do is the work itself. Most do not write the landing pages, build the campaigns, or run the ads. They decide what should be built and hold others accountable for building it.
What a SaaS marketing agency does
A marketing agency sells execution capacity. You get a team of specialists across content, SEO, paid media, email, design, and web, typically on a monthly retainer scoped to a set of deliverables. A good agency ships more, faster, and with deeper channel expertise than a single hire could.
What an agency usually does not do is own your strategy. It executes the brief it is given. If the brief is wrong, or there is no brief, the agency produces activity: content nobody reads, campaigns that generate leads sales ignores, and a monthly report full of impressions. Agencies are rarely accountable for pipeline or revenue, and their incentive is to keep the retainer, not to tell you the plan is wrong.
Fractional CMO vs agency: side-by-side comparison
| Criteria | Fractional CMO | Marketing agency |
|---|---|---|
| Main role | Strategy, direction, leadership | Execution across channels |
| Typical cost | €5,000 to €15,000 per month for B2B SaaS | €3,000 to €20,000 or more per month depending on scope |
| Accountable for | The plan, priorities, and the team’s output | Deliverables in the scope of work |
| Time to first impact | Sixty to ninety days for a foundation (ICP, positioning, plan) | Two to six weeks to ship, longer to show pipeline |
| Speed of execution | Depends entirely on who executes | High, within the scope |
| Strategic ownership | Full | Limited or none |
| Best when | Nobody senior owns marketing | The plan is clear and the bottleneck is hands |
| Main risk | A plan that never gets executed | Activity with no strategy behind it |
| Typical contract | Three to six month minimum, then monthly | Three to twelve month retainer |
| Exit | Handover to a full-time hire | Often leaves little behind unless you own the assets |
When a fractional CMO is the right choice
Choose a fractional CMO when the problem is direction, not capacity. The signs are recognizable:
- You have product-market fit but no repeatable go-to-market motion, and marketing spend is decided by instinct.
- You already have an agency or junior marketers, and their output is not turning into pipeline because nobody senior is directing it.
- The CEO has no marketing counterpart. Every marketing decision lands on the founder’s desk and gets made late.
- You are approaching a raise and investors will ask how growth works, not what campaigns you ran.
- You need to hire the first in-house marketers and do not know which roles to open first.
In every one of these cases, adding execution before adding direction makes the problem more expensive, not smaller. Our guide to B2B marketing strategy for post-seed startups covers the foundation a fractional CMO is hired to build.
When a marketing agency is the right choice
Choose an agency when the strategy is settled and the bottleneck is throughput:
- You have a marketing leader in-house, or a founder who has already done this before, and a written plan with channel priorities.
- You need specialist depth in one or two channels, such as paid search, technical SEO, or lifecycle email, and hiring for each would take months.
- Your funnel is measured and you know which stage is starved. You need more of a specific thing, not a rethink.
- You want to scale a channel that already works, and the risk is under-investing rather than mis-investing.
If you cannot describe your ICP in one sentence and name the two channels that produce your best customers, you are not ready to brief an agency, and a good one will tell you so.
The decision scorecard: six questions
Answer each question with the option that describes you today, then count. This is deliberately blunt, because the usual mistake is answering with where you want to be.
- Can you state your ICP in one sentence that sales agrees with? Yes: 0 points. No: 1 point.
- Do you know which channel produced your last ten best-fit customers? Yes: 0. No: 1.
- Is there someone senior who owns marketing decisions and is not the CEO? Yes: 0. No: 1.
- Do you have a written marketing plan with sequencing for the next two quarters? Yes: 0. No: 1.
- Do you have people who can execute content, paid, and web at a good standard this month? Yes: 0. No: 2.
- Is your monthly marketing budget, including people, above roughly €15,000? Yes: 0. No: 1.
Scoring. Zero to one point on questions one to four and zero on question five: hire an agency and brief it well. Three or more points on questions one to four and zero on question five: hire a fractional CMO and let your team execute. Three or more on questions one to four plus two on question five: you need leadership and execution together, and question six tells you whether you can afford them separately. Most post-seed B2B SaaS companies land in that last group.
The third option: a growth partner that leads and executes
The awkward truth about the fractional CMO versus agency debate is that for most post-seed companies neither one works on its own. I have seen the fractional CMO with nobody to execute: a very good plan, in a very good document, that nobody opened after month two. And I have seen the agency with nobody directing it, which produces a lot of motion and a monthly report full of impressions.
The usual fix is to hire both. It works, but you are now paying two retainers, you have created a handoff between the person deciding and the people doing, and you have two parties who can each point at the other when pipeline does not move. Founders spend a surprising amount of time managing that seam.
A growth partner collapses the seam. Senior operators set the strategy and then stay in the work: they write the positioning and the landing page, design the demand generation system and run the first campaigns, build the reporting and read it every Monday. One team is accountable, and that team is measured on qualified pipeline rather than on deliverables.
That is how Piquiyo works with post-seed B2B teams. We embed as senior growth operators, build the marketing engine, run it until the company is ready to hire in-house, and try to make ourselves replaceable on purpose. Our strategy and go-to-market service is where that starts.
What each option costs, and what you get for it
Ranges below are typical for B2B SaaS companies between seed and Series B. Treat them as orientation, not quotes.
- Fractional CMO: €5,000 to €15,000 per month for two to eight days of senior time. You are paying for judgment and leadership, not output. Execution is extra, either in-house salaries or an agency on top.
- Marketing agency: €3,000 to €20,000 or more per month depending on how many channels are in scope. Single-channel specialists sit at the low end; full-funnel retainers at the high end. Strategy is usually a paid add-on or absent.
- Both, hired separately: commonly €12,000 to €30,000 per month combined, plus the founder’s time managing the seam between them.
- Growth partner: typically in the range of a fractional CMO plus a lean agency, but with one retainer, one accountable team, and no handoff.
- Full-time CMO, for comparison: €250,000 or more per year fully loaded, before you hire the team they will need.
Fit by stage: seed to Series B
- Pre-seed and seed, under roughly €1M ARR: the founder is the CMO. Use freelancers or a single-channel agency for the one thing that already works. A fractional CMO is usually premature unless you are preparing a raise.
- Post-seed to Series A, roughly €1M to €5M ARR: the moment marketing needs to become a system. This is where a fractional CMO or a growth partner pays for itself fastest, because the cost of a wrong ICP or channel bet is now measured in quarters.
- Series A to B, roughly €5M to €15M ARR: a fractional leader plus specialist agencies, or a growth partner transitioning you to a full-time marketing lead and in-house team.
- Beyond Series B: full-time CMO, in-house team, agencies for overflow and specialist channels.
Common mistakes when choosing
The most common one is buying execution to avoid a strategy conversation. An agency retainer feels like progress. Without direction it is the most expensive way to learn what does not work, and it takes two quarters to learn it.
The second is hiring a fractional CMO and expecting them to do the work. Some execute, some manage executors, some only advise. Ask on the first call, because the word fractional covers all three.
Then there is comparing on price instead of on what is missing. A cheaper agency does not help if the bottleneck is direction. A pricier CMO does not help if the bottleneck is hands. And judging by deliverables instead of pipeline, which I would fix by agreeing on qualified pipeline, CAC payback and win rate as the scorecard before anyone signs.
The one almost nobody plans for is the exit. Ask what you will own when it ends: the strategy documents, the ad accounts, the content, the dashboards, and a hiring plan for the in-house team. Agencies in particular can leave surprisingly little behind.
Questions to ask before you sign either
- Who exactly will do the work, and how senior are they?
- What will you have built by day ninety, and how will we measure it?
- Which metric are you willing to be judged on: pipeline, CAC payback, or deliverables shipped?
- Show me a company at our stage you worked with. What changed, and what did not?
- What happens when you disagree with the founder on priorities?
- What is the minimum term, and what do we own if we stop?
- What would make you tell us to hire full-time instead of continuing with you?
Frequently asked questions
Is a fractional CMO cheaper than a marketing agency?
Not necessarily. A fractional CMO typically costs €5,000 to €15,000 per month and a B2B SaaS agency €3,000 to €20,000 or more, so the ranges overlap. The real difference is what you buy: leadership without execution, or execution without leadership.
Can a fractional CMO manage our agency?
Yes, and that is one of the most common arrangements. It works when the agency accepts direction and the fractional CMO has enough days per month to review the work, not just the reports.
How long before either one shows results?
Expect sixty to ninety days for a fractional CMO to deliver a foundation: ICP, positioning, a sequenced plan, and reporting. An agency can ship in two to six weeks, but pipeline from new channels usually takes one to two quarters to read reliably in B2B SaaS.
What is the difference between a growth partner and an agency?
An agency executes a brief. A growth partner writes the brief, executes it, and is accountable for the pipeline it produces. The practical test is who is in the room when you decide what to do next quarter.
Should a post-seed SaaS startup hire a fractional CMO or an agency first?
If nobody senior owns marketing, direction first. Hiring execution before strategy is the most common and most expensive mistake at this stage. If you cannot fund both separately, a growth partner that combines them is usually the better route.
Want leadership and execution from one team?
If you are stuck between a fractional CMO and an agency, the honest answer is usually that you need what both provide and cannot afford the seam between them. Piquiyo embeds senior growth operators with post-seed B2B SaaS teams to build and run the marketing engine. Book a free growth audit and we will tell you which model fits your stage, including when the answer is not us.