There are really only three ways to resource digital growth: build it in-house, hire an agency, or bring in a fractional senior partner. None is universally right. The mistake most businesses make is choosing a model for the wrong reasons — cost alone, or simply copying what a peer did — rather than matching the model to their stage, their existing capability and the kind of work that actually needs doing.
In-house: control, at the cost of breadth
An in-house team gives you control, context and continuity. It suits stable, ongoing needs where the work is predictable enough to justify permanent salaries. The limitation is breadth and seniority: it is expensive and slow to assemble a full bench of specialists, and most in-house teams end up with generalists stretched across paid, SEO, CRO and automation rather than genuine depth in each. It also concentrates risk — when a key person leaves, capability leaves with them.
Agencies: delivery capacity, with a catch
A good agency gives you delivery capacity and channel specialism without hiring. The catch is the model's economics: agencies are built to sell retainers, the senior people who pitch rarely do the work, and reporting often centres on activity rather than your commercial number. For well-defined, channel-specific delivery, a strong agency is a sensible choice — provided you can see past the polish to whether real trading experience sits behind it.
Fractional: senior judgement, without the overhead
A fractional senior partner sits between the two: experienced, accountable people embedded in your business on a part-time basis. It suits companies that need commercial judgement and hands-on execution but cannot justify — or do not yet need — a full-time senior hire or a large agency. You get the output of a specialist team, aligned to your outcomes, without the fixed overhead. The trade-off is that it works best when you want a partner to own a number with you, not simply to run tasks.
How to choose
Match the model to the work. Stable, ongoing, well-understood work favours in-house. Defined, channel-specific delivery favours an agency. Ambiguous, high-stakes growth that needs experienced judgement favours fractional. Many growing businesses run a blend — a lean in-house team, a fractional partner for senior direction and the hardest problems, and agencies for specific delivery — which is often the most cost-effective structure of all.
Frequently asked questions
Is fractional cheaper than an agency or in-house?+
Often, but the comparison should be value, not headline cost. Fractional gives you senior, trading-experienced input for a fraction of a full-time hire and usually with less overhead than a large agency retainer. The real saving is avoiding wasted spend on the wrong work — experienced judgement tends to pay for itself.
Can a fractional partner work alongside my agency and in-house team?+
Yes — that blend is common and often ideal. A fractional partner provides senior direction and tackles the hardest problems while your in-house team handles ongoing work and agencies deliver specific channels. A good fractional partner is agency-agnostic and designed to plug into whatever you already have.
When should I hire in-house instead?+
When the work is stable, ongoing and predictable enough to justify permanent salaries, and when day-to-day control and context matter more than breadth of specialist expertise. Even then, many businesses keep a fractional partner for senior direction the in-house team can't cover alone.