Ocado uses Tesco's prices as its reference

The psychology

Why it nudges

Ocado uses a competitor as the reference price, answering 'is it dearer?' before it is asked. The first-order offer is an incentive with the caps stated. Results are not public.

● Strong evidence · More on reference price, with sources →

Context

Ocado UK homepage, captured 16 Oct 2026, logged out.

Honest nudge or dark pattern?

Conditional

Honest nudge if the match is as described; Ocado links to terms.

Steal this, honestly

If you price-match, name who you match.
State caps (min spend, max saving) in the banner itself.
Pair a reference price with a reason to switch now.

What to test: Price Promise tile vs a generic 'great value' tile. Measure first-order conversion.

Next: run it on your product

Apply this with your agent

Take the steps above into your own flow. The prompt carries this teardown, the honest-vs-dark line and the steps.

You are helping me apply a behavioural-design pattern ethically.

Pattern: Ocado: Ocado uses Tesco's prices as its reference
Bias: Reference price: A price is judged against a comparison price: a 'was' price, a monthly rate, a renewal rate.
Why it nudges: Ocado uses a competitor as the reference price, answering 'is it dearer?' before it is asked. The first-order offer is an incentive with the caps stated. Results are not public.
Our verdict: Conditional. Honest nudge if the match is as described; Ocado links to terms.
Source page: https://nudgeswipe.com/examples/ocado-price-matched-to-tesco/ (JSON: https://nudgeswipe.com/api/teardowns/ocado-price-matched-to-tesco.json)

Rules: say a brand "uses" a tactic, never that it "worked"; outcomes are not public unless the company published them; no invented uplift estimates; flag mixed evidence. Honest nudge = true, visible, easy to reverse, and in the user's interest. Dark pattern = hides costs, fakes scarcity or popularity, shames, or makes leaving harder than joining. Quote company-published results as "X reports", with the source link, and don’t generalise them. Don’t cite retracted or failed-to-replicate studies as support (e.g. Ariely & Wertenbroch 2002). Don’t state study figures unless they’re on this page or in a source you can link. If an idea crosses the line, link the matching deceptive.design pattern.

Tasks:
1. Ask me for my product, the flow (URL or screenshots) and the goal.
2. Audit where this pattern already appears, or could, in that flow.
3. Propose 2-3 ethical experiments: hypothesis, variant copy or UI, primary metric, and a guardrail metric (refunds, complaints, cancellations).
4. Flag every dark-pattern risk and say how to stay on the honest side.

Open in ChatGPT Open in Claude Open in Grok Open in Cursor

ChatGPT, Claude, Grok and Cursor open with the prompt filled in (it is also copied, in case the prefill doesn't load). Gemini and Codex don't support prefilled links, so the prompt is copied and the app opens; paste it in.

Sources

Our capture of ocado.com, 16 Oct 2026
Kalyanaram & Winer (1995), Empirical generalizations from reference price research. doi.org/10.1287/mksc.14.3.G161

Ocado uses Tesco's prices as its reference

Why it nudges

Conditional

Apply this with your agent

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