The structural shift that started before AI
Brands going in-house predates AI. The ANA’s 2023 report found 82% of major brands now run in-house agencies, up from 42% in 2008. AT&T saved $100M a year moving programmatic buying in-house. P&G did the same. The wins: transparency, speed, and cost control.
What marketing leaders discovered is that big holding-company agencies have overhead built in. Account layers, strategy layers, production layers: each one adds margin and delays. You want to move fast on a campaign, react to the news, test a new channel? Bottlenecked by the agency’s own structure.
In-housing helped. But it’s expensive. You hire talent, build infrastructure, manage overhead. What worked for AT&T doesn’t work for a $30M software company that needs a production website, a UX audit, a campaign system but doesn’t want to hire six people to build it.
What AI changed, specifically
For twenty years, custom software had one gating constraint: engineers. A custom booking engine, a bespoke CRM, a new SaaS. Each took months of engineering time. That cost real money. Big agencies spread it across clients. Small studios couldn’t carry it.
That constraint broke between 2023 and 2025. Claude CLI, GPT-4, the tooling on top of them. Engineering costs dropped by an order of magnitude, not a percentage. Not everything: design judgment, systems thinking, client partnership are still human. But code generation, boilerplate, integrations, deployment config shifted dramatically.
Here’s how it plays out: DirtyBoat Charters’ booking engine. We rebuilt it from scratch after ten years of FareHarbor. What used to be a multi-month scoping conversation took weeks. Islamorada Luxe Charters built their own production site in an OpenClaw workspace and hit page one for a competitive local search term in two weeks. We set up the workspace. They did the work.
The case for two principals over fifty
Big agencies were built on two arguments: you can do more stuff in parallel, and you get specialists. Fifty people can run a media buy, redesign your brand, and build a custom integration all at once. Two people can’t.
That’s less true now. When tooling cuts production cost by an order of magnitude, the capacity math changes. What two experienced operators can ship in a quarter is not the same as 2018. Specialization also matters less when the same two people spent twenty years doing brand, product, and engineering work. The breadth is there. It’s just not spread across fifty people.
What you get with two principals that you don’t with a big agency: the person who sells the work does the work. No account layer between your brief and the build. Something breaks? You call the engineer who built it. Strategy isn’t working? You talk to the person who wrote it.
BCG’s 2025 data says firms leading in both AI and design beat laggards 1.7x on revenue, 3.6x on shareholder return over three years. The insight isn’t that small beats large. It’s that having strategy and execution in the same room beats fragmentation.
What enterprise clients should actually evaluate
Don’t ask “how many people work here.” Ask: who does the work on my account, what’s their track record on actual outcomes, and how fast do they move?
A holding company with 200 people on your account still hands off between strategy and build. Still has a production queue. The person pitching isn’t the person coding. For some clients and budgets, that’s fine. For clients who need speed, direct access, and a partner who owns both design and engineering under one contract, it’s a structural disadvantage.
The market is already voting. Senior agency talent is leaving holding companies to start independent practices. The people who used to justify big agency fees are now available through smaller, faster studios. The cost gap that made big agencies necessary has closed.
Our model at Vice Alliance (two principals, one contract, eight services, most work inside a quarter) answers a specific brief. Not every brief. But for clients who want to ship and stay shipped, the math now works in ways it didn’t five years ago.
Sources: ANA In-House Agency Report 2023 · Adweek on AI in-housing surge · BCG design and AI performance 2025 · MarketingProfs on in-housing 2025
