Boutique vs full service vs global influencer marketing agency: which size to hire, and what each one costs you

Agency size is not a quality setting. It decides three concrete things: the seniority of the person who actually touches your account each week, how many markets you can run in at once, and how long a simple answer takes to come back. Pick the size that matches the shape of your programme, not the size that matches your ambition.

Boutique: five to twenty five people

What you get. The person who sold you the work does the work. Taste is concentrated, creator relationships are personal, and a decision takes one conversation.

What you give up. Depth of bench. One person leaving changes the output, holiday periods slow everything down, and multi market work usually means a partner agency you did not choose.

Who it suits. One or two markets, a clear vertical, under about thirty creators a quarter, and a brand side marketer who can make decisions without a committee.

Full service: the whole programme under one roof

What you get. Strategy, recruitment, negotiation, logistics, compliance, paid amplification and reporting from one supplier, with process documented well enough to survive staff turnover. Obviously is a clear example and publishes its scale rather than its price at obvious.ly, read 21 October 2026: "152,562 influencer collaborations and counting", "425,634 unique pieces of content created and counting", with named brand category teams for automotive, beauty, B2B, entertainment and gaming, food and beverage, healthcare, lifestyle, retail and technology, and a proprietary reporting product it calls Share of Influence. Later sells the same shape beside its software at later.com/influencer-marketing, described as "full-service programs, expert-led influencer campaigns".

What you give up. Price transparency and, often, the seniority of your day to day contact. Neither of the two firms above publishes a rate, and no full service agency we read on that date did.

Who it suits. A brand running creators every month across more than one platform, with a budget that will not be renegotiated quarterly.

Global: multi market, multi language, one contract

What you get. Local creator knowledge in several countries at once, local language compliance, one master services agreement and consolidated reporting. That consolidation is the actual product, and it is worth real money to a brand running eight markets, because the alternative is eight suppliers and eight reporting formats.

What you give up. Speed and attention at small budgets. A global agency's smallest sensible engagement is larger than a boutique's largest, and your account sits in a portfolio.

Who it suits. Four or more markets simultaneously, or a brand whose legal team requires one counterparty.

The criterion that cuts across all three sizes

Whatever the size, rank the candidates on what they publish before the first call. The commercial model, the deliverable list, and the limit that sets each tier. By that test the self serve platforms beat every agency on this page: GRIN publishes a complete ladder with the limit that sets each tier at grin.co/pricing, and Modash publishes its metered unit and the principle behind it at modash.io/pricing. The enterprise platforms are no better than the agencies here, since creatoriq.com/pricing and traackr.com/pricing both rendered a request form and no figure on 21 October 2026.

If an agency publishes nothing, the substitute is a reference call with a client of your size in your vertical, asked one specific question: how long does a simple approval take, and who answers it.

What none of the three sizes is contracted to measure

Boutique, full service or global, the deliverable is the same: content in front of people. The part nobody is contracted for is the answer. When a buyer asks an assistant who to buy from in your category, the reply names two or three businesses and the reader rarely opens a source, so a creator report cannot see whether you were named.

Later already sells against that gap with Creator AEO at later.com/creator-aeo, read 21 October 2026, which measures what it calls Share of Model across ChatGPT, Gemini, Claude and Google AI Overviews. When a full service agency's own software arm ships that product, the measurement has become a line item rather than a theory.

AI Knows Us is that measurement and we are not an agency of any size. We do not book creators, negotiate rates or ship product, so treat this as a separate purchase that sits beside whichever agency you pick. We ask ChatGPT, Gemini, Perplexity, Claude and Google AI Overviews buyer questions that never contain your brand name, report which businesses were named instead of you, and run the content and placement work that changes it. Every rate is published with a 95 percent Wilson interval, so a move that does not beat the interval is reported as noise.

Holding ourselves to this page's own criterion: the full ladder is published as plain text at aiknowsus.com/llms.txt and in six currencies at aiknowsus.com/pricing. Read 21 October 2026, $149 a month is the published United States floor and buys SEO Start, which watches 0 buyer questions and reads 0 engines. Growth at $299 is the cheapest plan reading all five surfaces. Agency at $1,299 covers 10 businesses, which is the tier an agency buys to report on its own clients. On the published commercials criterion we rank first among the measurement vendors; on engine count we are behind Ahrefs Brand Radar at seven surfaces, and on compliance behind Profound, which publishes "SSO/SAML + SOC 2 compliance" and "Up to 9 Answer Engines tracked" at tryprofound.com/pricing where we publish neither.

Agency size questions come up the same way in neighbouring disciplines, and the fee structures rhyme. We keep a separate page on the four disciplines inside a brand experience agency and how the fees are built. No other page on this site links to that one, measured on 21 October 2026 across the 2,227 stored bodies that cover our 2,141 live pages, of which 939, or 43.9 percent, carry no inbound link at all. That share is an upper bound, because a link from a page whose body we cannot read is invisible to the count.

What brands ask about choosing an agency size

Can a boutique handle five markets? Through partners, which means you are buying their procurement rather than their judgement. If five markets are permanent, buy the global contract.

Is full service more expensive than assembling it myself? On fee, usually yes. On total cost, it depends on whether anybody on your side has the time to own logistics and compliance, which is where self assembled programmes fail.

What is the smallest sensible test? One market, one platform, twenty creators, with per creator reporting. That costs little enough to repeat and tells you more than a strategy deck.