Hire an agency for the making. Keep the brand decisions.

Keep the decisions and the rules

Deciding means the calls only your company can make: what the brand claims, what it refuses to say, which proof is strong enough to print, and which audience comes first. A good agency brings a sharp point of view to those calls and will argue for it. The company still makes them, because the company lives with the result long after the campaign ends.

Owning the rules means your company holds the written guidance that people and AI tools work from, and decides when it changes: the voice notes, the approved claims and their limits, the examples of good work, the instructions inside your AI assistants. If only the agency can edit those, the rules leave when the agency does, and the next partner starts from a blank page. An agency can write a beautiful rulebook. If only the agency can change it, you are renting your own judgment.

At Adaptius we build that guidance as a Brand Brain: the approved brand thinking your team, your partners, and AI assistants read before they make anything, kept in files the company owns and can edit without us.

The ANA's public summary of its 2026 in-housing report, published June 22, offers one signal. It says 53 percent of the study's jurors agree that the primary role of an in-house agency is to be a strategic partner in upstream strategy and brand-building work. Two limits apply. The figure describes the ANA's study jurors, not all marketers, and the full method sits behind a login. An in-house agency usually means a company's own creative team, which is one way to hold these jobs, not the only one.

Scope the making by the job

Making is where outside help earns its fee. A launch film, a site rebuild, a burst of campaign volume, or a first set of AI workflows can each need craft or hours your team does not have. Buy that for the job, with an end date, and let the scope say what is being made and whose rules it follows.

The IPA described this kind of mix in November 2020. Its report, carried out by the Foresight Factory, named five brand and agency models, including a hybrid one in which in-house and external teams share both the development and the execution of marketing strategy. The report predicted significant growth for that model and said the right model varies from client to client and campaign to campaign. It is a 2020 forecast of what would grow, and it does not measure what companies do today. Use it as a frame.

That line is a judgment call. A company with a strong agency relationship may keep a partner on weekly work for years and be right to. What matters is that the scope says, in writing, which side of the line each job sits on.

Map four owners on one real task

Pick one task your team does every week or month. The monthly product update email works. So does the sales one-pager that gets refreshed each quarter, or the weekly posts from your CEO's account. Then write one name, a person or a firm, beside each of four jobs.

Now read the map. A row you cannot fill under Make is a capability to build or to buy, and either answer can be right. An agency's name under Decide or Change the rule is the finding: your brand calls are sitting outside your company. A blank under Review means nothing checks the work, however good the maker is. Fix that one first.

If the rules are yours to keep, two earlier pieces help. Make AI sound like you covers where written brand guidance goes so assistants such as Claude and ChatGPT use it. A brand rule should know when to say yes covers how to test a rule before your team relies on it.

A decision aid, not a verdict

The map shows where your brand calls sit today. It does not prove that any split produces better work or better numbers, and neither source here measures that. The ANA summary reports what its jurors agree with. The IPA report forecast which models would grow. Your answer depends on your team's size, skills and budget, and on how often your rules change.

• Write rule ownership into the contract: the company owns the guidance, examples, and AI instructions made for it, in a form it can read and edit.
• Ask the agency to propose rule changes, and name the person inside the company who approves them.
• Get the current rules handed back when the engagement ends, so the next partner does not rebuild them from memory.
• Redraw the map when a task, a tool, or a partner changes.

Start with the task that most recently went wrong. Whichever row is blank, or sits outside the company, is your next decision.