Fractional CMO vs agency vs full-time hire: how to choose
An agency gives you execution capacity, a fractional CMO gives you senior direction part-time, and a full-time hire gives you a daily owner. The order matters: execution without direction produces noise. For a deep tech company between seed and Series B with no marketing leader, the usual sequence is fractional leadership first to build the engine, agencies for defined overflow work, and a full-time hire once the engine needs daily ownership.
What each one actually is
Three different things, often confused because they all sit under “marketing.”
- An agency is execution capacity you brief. You bring the strategy and the priorities; they produce the deliverables (paid, design, events, content) at volume.
- A fractional CMO is senior leadership that sets the direction and works inside your team part-time. Fewer hands, more judgement: what to do, in what order, and why.
- A full-time hire is a daily owner of an engine that already has a design. They run and grow what exists, and they need enough of a system to own on day one.
The honest comparison
Cost figures below are indicative UK and EU market ranges as of 2026, not Narrative Stack’s own pricing. They are directional and drawn from published guides.
| Comparison point | Agency | Fractional CMO | Full-time CMO |
|---|---|---|---|
| What it solves | Execution capacity and specialist production | Strategy, prioritisation, and a marketing function that lasts | Daily ownership of a working engine |
| What it needs from you | A brief and an existing strategy to work to | Access to the founder and the team; willingness to act on direction | A designed engine and a real budget to run |
| Typical cost (2026, indicative) | Retainers roughly £3,000 to £10,000+/month, scope-dependent | Roughly £3,000 to £10,000+/month market range for the category | £150,000+ salary before load, plus equity and a 3 to 6 month search |
| Time to impact | Fast on output, slow on direction | Fast on direction; first fixes inside 30 days | Slow: search, notice period, ramp |
| Where it fails | Executes without direction and produces polished noise | Not a fit if you need daily hands more than judgement | Hiring one at seed to invent strategy alone, then losing them in a year |
Why agencies struggle with deep tech specifically
This is not agency-bashing. Agencies optimise for deliverables, and few carry the technical fluency to write for engineers without the founder rewriting everything. In deep tech that gap is an issue: text that a technical buyer can tell was written by someone who does not understand the product does more harm than no copy at all.
It is why the most common agency break-up in this space sounds the same every time: they read your landing page once, produced something generic, and you spent more time correcting it than you would have spent writing it. Deep tech needs marketing led by someone who can sit with the engineering team and translate, not simplify.
When an agency is the right call
An agency is the right answer when the strategy already exists and you need execution capacity or specialist production: paid media at scale, event production, design systems, a content engine someone else is directing. Defined scope, clear brief, executional overflow. Bring a strategy, get output. The failure only shows up when you ask an agency to invent the strategy for you.
When a full-time hire is the right call
When the engine is built and needs a daily owner, roughly Series B and beyond with a working go-to-market. At that point the constraint is capacity and continuity, not direction, and a senior full-timer is worth the cost and the search.
The common, expensive mistake is hiring one too early: bringing a senior full-time marketer in at seed to invent the strategy alone, with no system around them, and losing them inside a year when it does not come together. That is the problem a fractional engagement is built to solve first.
When fractional leadership is the right call
Seed to Series B, technical founder doing go-to-market by default, real traction that is invisible, sales hired but not marketing. When you need senior judgement to set the direction before you spend on hands to execute it.
What the first 30 days look like: find where marketing is leaking (positioning, message, proof, or channel), fix the highest-leverage one, and build outwards, so there is fast visible proof before any big spend. Then the engine gets built to outlast the engagement. See Fractional CMO for the two engagement levels and pricing.
FAQ
Is a fractional CMO cheaper than an agency?
Often comparable in monthly cost but different in kind. A mid-size agency retainer and a fractional CMO can both run £3,000 to £10,000 a month in the UK; the agency buys deliverables, the fractional CMO buys direction, prioritisation, and a marketing function that outlasts the engagement.
Can I use a fractional CMO and an agency together?
Yes, and it is a common pattern: the fractional CMO sets strategy and briefs, and an agency executes defined workstreams such as paid or design. It fixes the usual agency failure, which is executing without direction.
Why do agencies often fail with tech companies?
Most agencies lack the technical fluency to write credibly for engineers and technical buyers, so the founder ends up rewriting the work. Deep tech needs marketing led by someone who can sit with the engineering team and translate, not simplify.
When should a startup hire a full-time CMO instead?
When there is a working engine that needs daily ownership, typically from Series B. Hiring a full-time senior marketer at seed to invent strategy alone is the expensive way to learn what a fractional engagement teaches for a fraction of the cost.
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