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When the Platform Writes the Campaign, What Does Your CRM Team Actually Own?
Klaviyo’s Composer now builds an entire campaign from a single prompt. Audience, copy, email, SMS, the flows. The boardroom’s first instinct is to ask whether it still needs the team, or the agency, that used to do that work. Wrong question. The execution layer was already on its way to free. The decision that matters is which work has to be owned by someone accountable, whoever clicks send: the data architecture under the prompt, the incrementality test that tells you what was real, and the consent governance you cannot hand to a vendor. Tim Roe on the operating model that survives the automation, and the one that does not.
Tim Roe
6/16/20262 min read
Klaviyo shipped Composer in its Q1 2026 release. Describe a campaign in plain language and it builds the thing: audience, copy, email, SMS, the flow logic, drawn from performance patterns across its customer base. Klaviyo calls the destination an “Autonomous B2C CRM,” where brands define outcomes and agents execute them. Nothing goes live without human approval, for now.
So the obvious question gets asked in every boardroom this quarter. If the platform writes the campaign, do we still need the team, or the agency, that used to?
It is the wrong question. And the internet is full of the wrong answer.
Search “can AI replace my agency” and you will find a hundred near-identical articles, most of them written to sell something, all resolving to the same tidy line: sort the work into pattern work and judgement work, automate the pattern, keep the judgement. It is not wrong. It is just not useful, because it stops exactly where the actual decision starts.
The real operating-model decision was never in-house versus agency. It is which work has to be owned by someone accountable, regardless of who, or what, clicks send.
Here is the sharper cut. Composer commoditises the execution layer. That layer was already commoditising: Ritner Digital put it plainly this year, the execution-only model is the one that breaks. The Gartner 2026 CMO Spend Survey found 39% of CMOs cutting agency budgets while trimming internal headcount too. So the real operating-model decision was never in-house versus agency. It is which work has to be owned by someone accountable, regardless of who, or what, clicks send.
Three things sit in that layer, and Composer touches none of them.
Data architecture. Composer is only as good as the customer data underneath it, and that data does not assemble itself. Someone has to own the single customer view, the definitions, the identity resolution. Feed an agent inconsistent inputs and you get confident, fluent, wrong.
Incrementality. Composer optimises against historical performance, which rewards campaigns that take credit for sales that would have happened anyway. Forrester found last-click attribution misallocates up to a quarter of budget. Only 26% of in-house marketers run incrementality tests, per eMarketer. An agent will happily scale the cannibalisation if that is what the numbers reward. Designing the test that tells you what is real is judgement work, and it stays yours.
Consent governance. This is the one that ends careers. Under UK GDPR and the EU AI Act, you cannot outsource liability to your vendor. If Composer targets a segment on a basis it should not have, the regulator does not knock on Klaviyo’s door. It knocks on yours. The accountability is non-transferable, so the oversight has to be too.
None of this is anti-platform. Composer is a genuinely good tool, and the brands that win will use it hard. But they will scope their people, in-house or agency, around the judgement that survives the automation, not the production that does not.
Stop paying anyone, including yourself, to do what the platform now does for free. Start owning the part it cannot.
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