Full-service means one firm holds the strategy, the creative, the media and the digital channels, so nothing falls between suppliers and one team can move budget across channels quickly. That coordination has real value, and it is bought with depth: the same fee funds a bench rather than a specialist. Whether that is a good trade depends on a single question, which is whether most of your budget is concentrated in one discipline or spread across several.
Where the breadth genuinely pays
It pays when a campaign's idea and its channels are inseparable, when your budget is spread across several disciplines none of which is large enough to engage a specialist, and when you have no internal marketing team to coordinate suppliers. In those cases the alternative is not better specialists, it is three agencies and a coordination job that falls to somebody without the time.
Where a specialist will beat them
Technical search, performance media at scale, lifecycle email and conversion optimisation all reward deep practitioners who do that work continuously. If one of those consumes most of your spend, a specialist plus a competent internal owner usually outperforms full service, because the specialist's whole business depends on being good at the thing you are buying.
Ask which disciplines are subcontracted
Full service is routinely delivered by employing half of it and buying the rest. That is fine when it is disclosed, and it changes who you are actually hiring. Ask for the list of in-house versus partner disciplines, who manages the partners, and whether you may speak to them. A firm that is comfortable answering has thought about it.
Judge the account team, not the agency
Agencies vary internally more than they vary from each other, and the team assigned to you determines the outcome. Ask for names, their other accounts, how many hours a month you get, and who is replaced if someone leaves. Then ask an existing client's day-to-day contact what the team is like to work with when something goes wrong.
Questions people ask about full-service marketing agency
Is full-service more expensive?
Per hour, usually, because the overhead of a multi-discipline bench sits in the rate. Total cost depends on whether the alternative is several retainers plus internal coordination time, which is a real cost that comparisons routinely omit.
What should be in the contract?
Named team and hours, ownership of accounts, assets and data, media transparency terms where they buy media, notice period, and a handover obligation at exit. These are unremarkable requests and much harder to obtain after you have given notice.
How do we review performance fairly?
Report each discipline separately against its own objective rather than as one blended marketing number. Blended reporting is the main way a strong channel subsidises a weak one inside a full-service relationship without anyone noticing for a year.
Can we start with a project?
Yes, and it is usually the sensible way in. A defined project with a fixed fee tells you how they plan, how they communicate and whether they hit dates, all of which matter more over a long retainer than the quality of their pitch.