A fractional CMO sells senior marketing judgment on a part-time basis. Growth as a Service (GaaS) sells strategy, execution, and measurement as one subscription. If you already employ people who can execute and what you lack is leadership, hire the fractional CMO. If you lack both the plan and the hands, GaaS is the better fit.
This guide compares three options a 10–200 person company usually weighs at the same time: a fractional CMO, a marketing agency, and GaaS. It covers what each one delivers, a decision table, what each costs with sourced numbers, when a fractional CMO is clearly the right call, when GaaS is the wrong one, and how the two combine.
What is the difference between a fractional CMO, an agency and Growth as a Service?
The difference is what you are buying: judgment, hands, or a complete function. One sentence each:
- Fractional CMO. A senior marketing executive who works for your company part-time, usually a set number of hours per week or month, and leads strategy, positioning, budget, and team decisions without doing most of the production.
- Marketing agency. A firm that executes marketing work, such as campaigns, content, ads, or SEO, and bills for it by the hour, by the project, or through a monthly fee tied to a scope of work.
- Growth as a Service. Growth-as-a-Service (GaaS) is a subscription model in which one provider owns a company's marketing strategy, execution, and measurement for a flat monthly price.
The term GaaS is also used for outsourced sales development and for fractional growth leadership. In this guide we mean the marketing model, described in full in what is Growth-as-a-Service.
What does each one actually deliver?
Each option delivers one thing well and leaves a gap you have to fill yourself.
A fractional CMO delivers judgment without hands. You get a person who has run marketing before and can choose a position, set a budget, hire and coach a team, and speak to a board. You do not get production. The plan still needs writers, designers, media buyers, and an analyst. If those people already work for you, a fractional CMO makes them better. If they do not, the plan waits.
An agency delivers hands by the hour. You get specialists and production capacity inside a defined scope. You usually do not get ownership of the business result: the agency executes the brief, and deciding whether it is the right brief remains your job.
GaaS delivers strategy, execution, and measurement as one loop. At Scalehackerlab that means AI marketing agents (an orchestrator plus 8 specialists) produce the work, senior human strategists direct and review all of it before it ships, and the numbers live in the Scale AI-hub, a workspace you can open any day. You do not get an executive on your leadership team. A strategist who reviews your marketing is not a CMO who sits in your board meeting, and a provider who blurs that line is overselling.
Fractional CMO vs agency vs GaaS: the decision table
The table below summarizes the three models on the six points that decide most purchases.
| Criterion | Fractional CMO | Agency | GaaS |
|---|---|---|---|
| What you get | Senior leadership and a plan | Execution inside a scope | Strategy, execution and measurement |
| Who executes | Your team or vendors you hire | Agency staff | The provider (at Scalehackerlab, AI agents reviewed by strategists) |
| Typical commitment | Part-time, often about 10 hours a week, monthly fee | Monthly fee or project, often with a minimum term | Monthly subscription, cancel anytime |
| Reporting | Executive updates to founder or board | Usually a monthly report | Live dashboard plus scheduled reviews |
| Best when | You have executors and lack leadership | You need deep skill in one channel or a big campaign | You lack both a plan and the hands |
| Wrong when | Nobody is available to execute the plan | Nobody on your side owns strategy | You need an executive in the room, or only need hands |
The "typical commitment" for fractional executives comes from the Fractional Jobs Fractional Work Report (2026), which found that "the typical posting calls for about 10 hours per week" and that 46% of fractional executives bill primarily through a monthly fee. The GaaS column describes the model as we run it; other vendors use the label differently, as covered below.
What does each option cost?
Fractional CMO pricing varies widely and reliable data is thin, so treat any single range you read with caution. Most ranges repeated online come from fractional CMO firms' own blogs, and we could not trace them to a survey. The best data point we found is the Fractional Work Report (2026), published by the marketplace Fractional Jobs from a survey it commissioned: fractional marketing executives charge a mean of $209 per hour. At the report's typical 10 hours per week, that works out to about $9,000 per month. That monthly figure is our arithmetic, not a published number, and the source is a marketplace with an interest in the category.
For comparison, the median annual wage for a full-time marketing manager was $166,790 in May 2025, according to the U.S. Bureau of Labor Statistics Occupational Outlook Handbook. Benefits add to that: they made up 30.0% of private-industry employer compensation costs in June 2026, according to BLS Employer Costs for Employee Compensation data. Applying that share puts a median marketing manager near $238,000 per year fully loaded. That is also our calculation, and a manager is a less senior role than a CMO.
Agency pricing is wide too: digital marketing services typically cost $1,000 to $20,000 or more per month, according to WebFX's digital marketing pricing survey (2026) of more than 250 US marketers. WebFX is itself an agency, so read it as a vendor's survey.
GaaS pricing depends on the vendor. Scalehackerlab's plans are $199 per month (Spark, 1 channel), $399 (Growth, 3 channels, a dedicated strategist and a bi-weekly check-in), and $899 (Scale, all 8 channels, a senior strategist for 8 hours a month and a monthly executive review), with Enterprise custom from $3,000. There are no setup fees, plans are month-to-month, and ad spend is separate and paid by you into accounts you own. Other providers using the GaaS label publish much higher prices; see Growth as a Service pricing for the full list.
The honest reading: a fractional CMO and a GaaS subscription are not priced for the same job. One is a senior executive's time; the other is a production system with strategist review. Compare them on the gap they fill, not on price. For the in-house side of the math, see marketing manager vs agency vs GaaS.
Is Growth as a Service a fractional CMO?
No. Some vendors sell them as the same thing, but the two solve different problems, and we treat them as different products.
The overlap in language is real. Norway's Spring Agency writes in its article What is Growth as a Service? (April 2023) that "Growth as a Service is often understood as a fractional CMO service, marketing for hire or CMO for hire," and then adds that its version includes "a complete team that actually execute." Core Bloom's GaaS page packages fractional CMO and fractional business development manager roles under the GaaS name. Both are legitimate offers, and both show that the label is still unsettled.
We keep the terms apart for three reasons:
- The unit of purchase is different. A fractional CMO is a person whose time you buy. GaaS is a function you subscribe to. If the person leaves, the fractional engagement ends; a function should keep running.
- The accountability is different. A fractional CMO is accountable for direction and for the team's performance. A GaaS provider is accountable for the work being produced, reviewed, shipped, and measured every week.
- The seat is different. A fractional CMO joins your leadership team, makes hiring decisions, and can represent marketing to investors. A GaaS provider does none of that.
When is a fractional CMO clearly the right call?
A fractional CMO is the right call when your gap is leadership rather than output. Four situations make the case clearly:
- You already have an execution team. Two or three marketers, or an agency you are happy with, are busy but undirected. A senior leader turns that activity into a plan.
- You have a board-level or investor-level leadership gap. Someone has to own the marketing number in leadership meetings and answer investors. That requires a named executive.
- You are repositioning. Entering a new market, moving upmarket, or rebuilding the brand after a merger is a judgment problem first. Production volume will not fix a position that is wrong.
- You are about to hire a marketing team. A fractional CMO can define the roles, run the interviews, onboard the hires, and often help recruit a full-time successor.
In all four cases, buying GaaS instead would give you more output aimed at a question nobody has answered yet.
When is GaaS the better fit, and when is it wrong?
GaaS is the better fit when nobody in the company owns marketing end to end and there is no team to direct. That describes many companies of 10 to 200 employees: a founder or one overloaded marketer, a folder of tools, and no consistent measurement. A fractional CMO there would write a plan no one has the capacity to carry out. A subscription that includes strategy, production, and the dashboard closes that gap. The first piece of work arrives within 7 days of signing.
GaaS is the wrong choice when you need an executive in the room, when you are pre-revenue and still searching for product-market fit, when you are running large brand campaigns, or when your strategy is settled and you only need hands. A longer self-check is in is Growth as a Service right for you.
Can you combine a fractional CMO with GaaS?
Yes, and it is often the cleanest setup for a company that needs both leadership and output. The fractional CMO owns positioning, budget, and the leadership seat. The GaaS provider is the execution and measurement layer the CMO directs. The CMO gets a production system and a live dashboard without hiring a team.
Two conditions make it work. Agree in writing on who decides what: the CMO sets priorities, and the provider's strategists own each channel plan and the review before anything ships. And give the CMO direct access to the dashboard, so both sides decide from the same numbers. The same split works with an agency in the execution seat.
Where to start
Start by naming your gap in one sentence. "We have people but no direction" points to a fractional CMO. "We have direction but need specialist capacity in one channel" points to an agency. "We have neither, and nobody owns the number" points to GaaS.
If you are not sure which sentence is yours, the free growth assessment returns a strategy document within 48 hours, with no credit card. If the honest answer is that you need an executive first, the document is still yours to hand to them.