One Agency, Not Five Vendors: Why Splitting Creative, Media, and Measurement Slows Growth

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Most marketing rosters were built for coverage: one vendor made the creative, another bought the media, and a third measured the results. That structure worked when channels and responsibilities stayed relatively separate.

Today, the same ad has to feel native in a feed, sound credible in a creator’s voice, and perform inside an auction that rewards constant iteration. Yet the teams shaping each part often sync only when the monthly deck arrives.

That gap is getting harder to ignore. Ebiquity’s 2026 Media Budgets Report found that 66% of marketers plan greater integration between creative and media.

An integrated marketing agency closes that gap by putting creative, media, and measurement behind one brief, one feedback loop, and one set of numbers.

Let’s see how it works.

P.S. If you'd rather see the model than read about it, here is how Fieldtrip's ecosystem works.

TL;DR

  • An integrated marketing agency puts specialist teams behind the same brief, feedback loop, and performance definitions.
  • Growth slows at the handoffs between vendors, where context shrinks into documents and results reach the next brief late.
  • The Hurom case from Fieldtrip's inBeat team shows how creative changes and performance testing can operate in the same feedback loop; the published case study reports a 65% lower CPA, 300% ROAS growth, and a 33% month-over-month increase in profit margin.
  • Specialists still win in regulated niches, technical industries, and brands with a strong in-house integrator.
  • Evaluate a partner on who owns the brief, who owns the data, and who checks the numbers, then move over in six steps without pausing campaigns.

What Is an Integrated Marketing Agency?

An integrated marketing agency is one partner that plans, produces, buys, and measures against a single brief and a shared performance framework. That is an operating model, and the name on the door doesn't guarantee it.

The model brings omnichannel capabilities under one plan, so social, search, video, and creator content answer to the same message and the same reporting. It differs from a holding company, which owns many agencies under one parent, and from a specialist roster, where each vendor holds one function. Fieldtrip's integrated marketing services page lists what the work covers.

Is an Integrated Marketing Agency the Same as a Full-Service Agency?

Not always. Some full-service agencies run strategy, creative, and media as separate departments with separate targets. Others work from one plan. The test is whether a result in one function changes the next decision in the others.

Where Growth Slows When Creative, Media, and Measurement Sit With Different Vendors

Growth slows because each vendor optimizes its own metric on a delay, and the gaps between vendors belong to no one. Four mechanisms drive the loss.

What Goes Wrong When Creative Is Briefed Without Media Data?

Creative written without media data is a guess about attention. The brief arrives with a persona and a message, but without the hook that held viewers on which placement last month. Omnichannel messaging then gets drafted for every channel at once and tested properly on none.

NCSolutions and Nielsen studied about 500 FMCG campaigns and found that weak creative produced weak sales lift, and that lift was credited mostly to media. Strong creative lifted results and depended less on media. The data is from 2017, and the mechanism still describes what media buyers see today.

Fatigue adds a clock. Meta describes it as performance declining because people have seen an ad too many times, and says it affects every ad eventually. In our experience, a replacement brief starts only after the media vendor reports the decline.

Why Does Media Buying Fall Short When the Creative Is the Problem?

A media buyer can change budgets, bids, audiences, and placements, and our guide to how media and creative lift ROAS covers why those levers only go so far. A media buyer can't change what the ad says. When the problem is the message, the levers a media-only vendor holds treat symptoms: CPMs, frequency caps, audience exclusions. The account looks busy and the cost per result stays exactly where it was, quarter after quarter.

What Happens When Measurement Sits Outside the Feedback Loop?

Independent measurement can strengthen accountability, especially when the same agency also buys media. The problem starts when the measurement team receives channel outputs without the decisions behind them. A new hook, changed offer, or audience shift may move acquisition cost, yet the analyst sees only the resulting numbers. Multi-touch attribution and marketing mix modeling already answer different questions; when measurement sits outside the feedback loop, those differences can turn into competing explanations instead of a shared view of what changed.

How Handoffs Between Vendors Delay Decisions

Every handoff compresses context into a document, so a finding from week two reaches the next brief in week eight or never arrives. A decision one team could make in an afternoon becomes a request, a ticket, and a call with a different company.

A diagram of three separate vendors passing a brief down a line, with no route for results to travel back, beside one shared loop in which results return to the next brief.
Source: Fieldtrip original

The table shows what each handoff loses and who notices first.

HandoffWhat gets lostWho sees it first
Strategy to creativeWhy the audience was chosen and which trade-offs were set asideThe creative team, when the first concepts miss
Creative to mediaThe intent behind each variant and which one was the hypothesisThe media buyer, when results arrive with no plan for reading them
Media to measurementAudience and placement changes made mid-flightThe analyst, when the numbers don't reconcile
Measurement to strategyWhat the data says about the message, beyond the channelOften no one, because the report and the brief go to different inboxes

How an Integrated Marketing Agency Compares With a Specialist Roster, a Holding Company, and an In-House Team

An integrated marketing agency offers the shortest path from a result to the next brief. A specialist roster offers the deepest craft in each channel, a holding company offers one commercial relationship, and an in-house team offers control. The right choice depends on who in the organization can act as the integrator.

ModelWho owns strategyHandoffs and speed of learningAccountabilityWorks best when
Integrated marketing agencyOne brief owned jointly by the agency and the clientFew; results reach the next brief in the same planning cycleOne partnerCreative, media, and measurement need to move together
Specialist roster (channel experts)The client or a lead vendorOne at every vendor boundary; learning moves as fast as the client carries itSplit by functionA strong internal integrator directs a few high-spend channels
Holding companyThe parent group, usually through a lead agencyFewer contracts, though the internal matrix can keep several teamsOne contract shared across agency brandsLarge global accounts want one commercial relationship
In-house marketing departmentInternal leadershipFew; limited by headcount and specialist depthInternalChannels are stable and the internal bench is deep
In-house department with fractional CMO leadership and specialistsThe fractional CMODepends on how well specialists are briefedFractional CMO for strategy, specialists for executionA smaller team needs senior direction without a full-time hire

Consolidation is moving fast at the top of the market. In February 2026, The Drum reported that Bayer Healthcare consolidated nearly $800 million in media and creative business into IPG in 2025, and that Jaguar Land Rover moved a $500 million creative and media account to WPP in January 2026.

Fewer contracts don't automatically mean integrated work. AKQA's founder Ajaz Ahmed told The Drum that the holding-company matrix has been formalized into hierarchies, and that each layer still needs its own leadership, coordination, and reporting.

Agency size changes the picture as well. Our view: pick the integrated model when the business problem sits between functions, and pick specialists when it sits inside one.

Hurom shows what that difference looks like in practice when creative decisions and performance data stay inside the same feedback loop.

Hurom: What an Integrated Creative and Media Loop Looks Like in Practice

Hurom provides a concrete example of the integrated model described above. The program brought creator-led creative, iterative testing, paid performance, and search into the same learning cycle, with results feeding back into the next round of creative decisions.

The original case study was published by inBeat, Fieldtrip's creator and performance marketing team.

Grid of eight vertical Hurom UGC video ads by inBeat, each showing a creator making or drinking juice with a Hurom juicer at home.

Why Was Hurom's CPA Rising?

Hurom's cost per acquisition was rising because of creative fatigue and outdated, overly promotional ad designs. Profitability was low, since marketing costs had increased while return on ad spend stayed weak. The brand also leaned on promotional discounts and sales-driven messaging to hit its sales targets. In our reading, the problems reinforced each other: discount-led creative fatigued while acquisition costs continued to rise.

What Did Hurom Change First in Its Creative?

The first change was the message. The program shifted from an always-on-sale approach to health-focused messaging that spoke to concerns such as gut health and skin issues. Creator-made UGC carried the new message, with the aim of making the brand more relatable and more trustworthy.

A dedicated creative strategist then analyzed what made the UGC work: the hooks, the variations in calls to action, and the social proof. The goal was to turn those findings into the next round of UGC briefs rather than leave the learning inside the media account.

A screenshot of the Challenge, Solution, and results section of inBeat's Hurom case study page.
Source: inBeat, inbeat.agency/case-studies/hurom

How Did Hurom's Iterative Testing Feed the Next Round of Briefs?

Cost per acquisition is a paid media number, yet it improved alongside a change in creative strategy. That is the point where the functions meet. In our reading, test results had to travel from the ads back into the next brief, and the strategist's hook, call-to-action, and social proof analysis did that.

Two-by-two matrix of discount-led versus health-led message against no testing versus hooks, CTAs and social proof tested each cycle; only changing both shows CPA down 65%, 300% ROAS growth and margin up 33%.
Source: Fieldtrip original

The case study also reports month-over-month profit margin alongside ROAS and CPA, adding a profitability check rather than judging the program on acquisition cost alone.

What the Published Hurom Results Show

MetricPublished figure
Cost per acquisitionOverall CPA reduced by 65%
Return on ad spendROAS growth of 300%
Profit marginMonth-over-month profit margin growth of 33%

These figures come from inBeat's published case study, and Hurom is a client of the network. Treat them as campaign-reported numbers. The mechanism transfers more reliably than the percentages, because a brand with a different starting point starts from different numbers. Full case studies from across the network are available on our work page.

What Are the Signs a Multi-Vendor Marketing Roster Is Slowing Growth?

A roster slows growth when the same questions keep crossing company lines. The patterns below show up before the numbers do, and each one has a quick check.

PatternWhat it usually meansWhat to check
Reports from different vendors disagree on the same metricEach vendor uses its own conversion definition or attribution windowCompare definitions and windows before comparing results
Every new vendor kickoff repeats the same backgroundStrategy lives in decks, with no shared briefWhether one current document explains audience, offer, and goals
No one owns the customer journey end to endEach vendor owns a stage or a channelWho can describe what a customer sees between the first ad and the purchase
Scope disputes over where one vendor's work endsContracts split by deliverable, with no shared outcomeWhich tasks sit in no one's scope
Test results stay with the vendor that ran themNo shared learning logWhere creative test results are stored and who reads them
Strategy changes reach vendors in different weeksBriefing runs vendor by vendorHow long a positioning change takes to show up in live ads

The fifth row costs the most to fix later, and a shared testing log is the usual remedy; our guide to creative testing and measurement for large brands shows how to set one up.

Customer journey mapping is the quickest test of the third row. A team that maps the path from first ad to repeat purchase and finds three owners along it has found its answer.

Organizations that describe themselves as digital-first often still split ownership by tool, with one vendor for the ad platform, another for the site, and a third for email. The map shows where a customer crosses those lines and who is watching when they do.

When Best-of-Breed Specialists Still Win

Best-of-breed specialists win where domain knowledge decides the outcome, and an integrated agency can bring them in under one brief. Bain's analysis of agency consolidation from February 2026 tells CMOs to integrate tightly where it pays, in measurement, data, and workflow, and to keep creative excellence and brand voice distinct.

Why Do Specialists Win in Deep Regulated Niches?

Rare disease expertise means knowing which claims a regulator permits and where patients and clinicians look for information. Public sector marketing and government relations work depend on procurement rules, election calendars, and stakeholder maps that a generalist team takes months to learn. A specialist in these areas is worth the extra handoff, provided the specialist works from the shared brief and reports into the same measurement framework.

Why Do Specialists Win in Highly Technical Industrial Categories?

Buyers in freight logistics and warehouse automation evaluate vendors through engineers and operations leads, so sector fluency counts before channel fluency. A writer who understands dock scheduling and slotting earns trust that a generalist can't. The integrated agency's job is to carry that voice consistently through paid, search, and sales content.

Does an Integrated Agency Help a Brand With a Strong In-House Team?

The integrated model adds the least where an in-house team already acts as the integrator. Bain makes the point directly: a brand that wants a lead integrator agency needs an internal integrator too. Where that role exists and works, specialists directed by the in-house lead can outperform a bundled partner.

What Lock-In Risks Should You Contract Around?

Consolidation creates dependence, and Bain names four forms:

  • Workflow lock-in appears when the agency owns briefs, approvals, and reporting.
  • Data and identity lock-in appears when the agency builds audience data the brand can't take with it.
  • Technology lock-in comes from proprietary measurement and campaign tools.
  • Strategy stewardship lock-in appears when the agency's proximity erodes the brand team's own expertise.

The evaluation questions below turn each into something to ask before signing.

How Fieldtrip Collapses Strategy, Creative, Media, and Measurement Into One Ecosystem

Fieldtrip works in small, autonomous teams connected by shared strategy, which keeps the work focused and nimble without losing scale. Each team is built to work alone or beside a client's own people, and all of them work from the same plan.

How Does Strategy Set the Brief Every Fieldtrip Team Works From?

Strategy comes first and feeds every other team. Our strategy work covers:

  • Market research
  • Consumer segmentation and market sizing
  • Competitive intelligence
  • Media and communications planning
  • Consulting
  • Cultural trend analysis

That output becomes the brief creative, media, and measurement all read, and it underpins the growth strategies we build for each brand.

How Do Specialist Teams Join the Work at Fieldtrip?

A brand can start with the team closest to the problem and add others as priorities emerge. The specialist brands in the group cover creator and influencer programs, studio production and UGC, paid and programmatic media, and SEO. Design covers branding, design systems, and web design and development, the UX/UI Design behind the touchpoints a customer uses.

The work also moves off screens. Out-of-home and experiential marketing sit inside the same plan as the paid work, so an in-person activation answers to the same brief and reporting framework as a paid social campaign.

How Does Fieldtrip Create a Shared View of Performance?

Knowledge moves between teams through shared planning, reporting, and review cycles, so media findings reach creative briefs and creative tests inform media plans. Measurement and Analytics owns the shared view, including attribution, creative testing, and funnel diagnostics.

Tooling matters here too: Gartner's 2025 survey found that only 49% of martech tools are actively used, and one shared stack is one way to avoid adding to that gap.

How to Evaluate an Integrated Marketing Agency Before You Consolidate

A long service list says little about whether an agency is integrated, so evaluate how it connects functions. The questions below separate a shared operating model from a bundle of departments.

QuestionWhat a strong answer includesWarning sign
Who owns the brief?One living document that the agency and client both editA new deck for every function
What is the one source of truth for results?One dashboard, defined metrics, and a named ownerSeparate reports per channel
How are creative and media budgets decided together?A single planning meeting with test results on the tableBudgets set in different meetings by different people
Who owns data and assets if the relationship ends?Written ownership terms with export formatsSilence, or "we'll work it out"
Who audits measurement when the agency also buys media?An outside check on headline numbers or access to raw platform dataThe buyer grades its own results
How is a specialist added or removed mid-engagement?A defined process under the same briefA new contract and a new kickoff
Which case study shows each function's contribution?A program that names what creative, media, and measurement each changedA single headline number with no mechanism

Platform-reported and independently verified results are different things, and a credible case study says which it is.

How to Move From Five Vendors to One Without Stopping Campaigns

Move in sequence, keep campaigns running, and let contract dates set the pace.

  1. Name one lead partner to keep the brief current, with the brand signing off on changes.
  2. Map contract end dates and notice periods, so you know which vendors can roll over first.
  3. Roll overlapping scopes into one brief, one budget, and one calendar.
  4. Agree one KPI set, with customer acquisition cost and customer lifetime value defined once and used by every team.
  5. Move data, assets, and tooling under written ownership terms.
  6. Review quarterly, and decide which specialist teams stay modular.

Marketing operations strategies are the internal counterpart to this plan. Someone on the brand side has to govern the workflow, the data, and the reporting rhythm, which is why marketing operations for enterprise teams deserves its own plan before the first vendor rolls off.

How Integrated Marketing Agency Pricing Works

Integrated marketing agency pricing comes in three structures, a flat fee, a percentage of spend, or a base fee plus performance, and the scope sets the price. Budget and resource constraints are the top challenge for 63% of CMOs, according to Gartner's survey of 174 senior marketing leaders, so overhead gets scrutiny.

A fragmented roster carries duplicate account management, separate contracts, and separate reporting. Consolidation removes the duplication, though it doesn't lower fees on its own. Three structures cover most engagements:

  • A flat fee prices a fixed scope.
  • A percentage of spend ties the agency's pay to media volume.
  • A hybrid sets a base fee plus a performance component.

Build One Growth System With Fieldtrip

The Hurom program changed the message and the testing together, and its published results followed. That is the model Fieldtrip runs: shared strategy, specialist teams, and one connected feedback loop. A brand can start with one team and expand as priorities grow.

Talk to Fieldtrip about how your current vendors connect. The first call covers where handoffs cost time, which team to start with, and what a first quarter could look like.

FAQs

What should a contract say about measurement independence when the agency also buys media?

It should define each metric and attribution window in writing, give the brand access to raw platform data, and allow an outside check on headline numbers. The evaluation table above lists the question to ask. The contract wording is what makes the answer enforceable.

Would the Hurom approach work without creator content?

Creator-made UGC was the vehicle in this program, and the mechanism was the loop from message to testing to the next brief. That is our reading, and no one has measured it. A brand with strong product video or founder content could run the same loop on different material.

David Morneau
David Morneau
Co-founder & CEO, inBeat Agency · CEO, Fieldtrip

David Morneau is the co-founder and CEO of inBeat Agency and CEO of Fieldtrip, the agency network that includes inBeat. Based in Montreal, Canada, he is a law graduate turned serial entrepreneur whose work spans paid media, performance creative, and search engine optimization (SEO).

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