Octopus leads with Which? and 891,063 reviews

The psychology

Why it nudges

Octopus uses authority (an independent consumer body's recommendation) and social proof (review count and 'most popular'), right next to a one-field quote form that keeps effort low. Results are not public.

● Strong evidence · More on authority, with sources →

Context

A UK energy supplier's homepage. Switching energy supplier is a low-trust, high-hassle decision for many households.

Honest nudge or dark pattern?

Conditional

Honest nudge if the claims are current and sourced. 'Most popular' needs a stated basis. Any "most popular" claim needs a stated basis.

Steal this, honestly

Put independent third-party endorsements above your own claims.
Use a specific review count rather than 'thousands'.
Pair trust signals with a single, low-effort first step.

What to test: Trust bar above vs below the quote form. Measure quote starts.

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: Octopus Energy: Octopus leads with Which? and 891,063 reviews
Bias: Authority: We defer to signals of expertise or official endorsement.
Why it nudges: Octopus uses authority (an independent consumer body's recommendation) and social proof (review count and 'most popular'), right next to a one-field quote form that keeps effort low. Results are not public.
Our verdict: Conditional. Honest nudge if the claims are current and sourced. 'Most popular' needs a stated basis. Any "most popular" claim needs a stated basis.
Source page: https://nudgeswipe.com/examples/octopus-which-recommended-reviews/ (JSON: https://nudgeswipe.com/api/teardowns/octopus-which-recommended-reviews.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 octopus.energy, 16 Oct 2026
Milgram (1963), Behavioral study of obedience. doi.org/10.1037/h0040525

Octopus leads with Which? and 891,063 reviews

Why it nudges

Conditional

Apply this with your agent

Related teardowns

Notion labels one plan "Recommended" and leads with logos

The Guardian asks readers to give back for journalism they already read free

Linear's pricing: 'Free for everyone' and 40,000 companies

5 new nudges, every Friday