Agencies and operators put the account, the risk and the money in different hands. An agency optimises an account you own. An operator sells through accounts it owns, on commission. The rest of the decision follows from who owns the account.
Both promise to grow your European marketplace sales, and both will show you dashboards and reports. The difference that matters comes before any of that: whose name is on the seller account, whose VAT number is on the invoice. And who is exposed when a listing gets suspended.
Who owns the account, and who owns the risk
With an agency, the seller account is yours from day one: your legal entity and your VAT registrations in whichever countries you're active. The marketplace terms are yours to accept and keep up with. The agency logs into your account and works inside it. If a marketplace suspends the account for a compliance issue, that suspension lands on your business, not the agency's.
With an operator, the account belongs to the operator. Stock moves to the operator's facilities and stays your property, but the listing, the seller rating and the marketplace relationship sit on the operator's side. The operator runs the seller account and carries that exposure, because it's the operator's account. Tax, import and product responsibilities must be checked for the actual stock route.
Who does the daily work
An agency's job is defined narrowly: listings, advertising, pricing advice, maybe customer service, all inside the boundaries you set and the account you maintain. Stock planning, VAT filings, compliance paperwork and every support ticket that isn't strictly "marketing" usually stay with you, or get added back as extra scope.
An operator's job is the whole operation: listings, advertising, pricing, stock coordination, buyer-language service, returns, and the marketplace relationship itself. You agree the plan: which marketplaces, which products, which price bands. The operator runs it day to day.
Cost structure: retainer vs commission
An agency is typically a retainer or a fee, billed whether or not anything sells that month. It's the model that fits when you want a specialist team working inside infrastructure you already have.
An operator is typically paid on commission, a share of what actually sells. The agreement defines the sales-based commission and how other costs are allocated. That structure only works because the operator is also carrying the account and the operational risk. A party with no exposure to the outcome has little reason to accept being paid only when there is one. See how commission-based management actually works for the mechanics.
When an agency is the right answer
Choose an agency when you already have (or plan to build) the entity, VAT registrations, logistics and customer service that a European marketplace operation needs, and what you're missing is marketplace expertise specifically. You want to own the channel long-term and staff it yourself. The agency is there to make that team better faster, not to replace it.
When an operator is the right answer
Choose an operator when you want the European revenue without building a European operation to get it, with the operator handling the seller accounts and the agreed daily work. You're trading some margin, via commission, for someone else carrying the account, the compliance and the daily work. It's the right route when Europe is worth selling into but not (yet, or ever) worth becoming a second company to run.
Agency and operator aren't the only two routes. A third is selling to a distributor outright. If you want the full comparison including that option, the three-route breakdown lays out, for each one, who carries the work, who keeps control and who earns when nothing sells. And if you'd rather have a direct answer for your own range, the Brand Review is free, written, and comes back within five working days.