For AI-CMO eraLondon — New York
AI08 Jan 2026 · 4 min read

Synthetic personas: The shortcut that leads exactly nowhere

Replacing qualitative human research with LLM-generated agents is just a high-speed way to confirm your own biases.

A synthetic persona is a mirror wearing a costume.
I.

The Moment

Three vendors this month have pitched me the same thing: a suite of AI-simulated customers you can interview instead of the real ones. Cheaper. Faster. Always available.

II.

What Everyone Saw

The pitch lands because it feels progressive. Research is slow. Recruitment is painful. Why not ask a model?

III.

What Actually Happened

The model has read what you have read, watched what you have watched, and answers in the register you already prefer. It will never surprise you the way a real customer does in minute forty of an interview when she says the quiet part out loud. That surprise is the only reason to do research at all.

The Verdict

NOISEDiscard

Noise. Use synthetic panels for scale-testing survey wording. Never for insight. The moment you replace human friction with model-shaped agreement, you have automated the removal of the one thing that could have made your work distinctive.

The Question

When was the last time customer research changed your mind about something you were already sure of?

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