Klaviyo leads with 'Start with a free plan' and lists the caps

The psychology

Why it nudges

Klaviyo uses the zero-price effect, making free the headline rather than a footnote. Listing the caps beside it lowers the friction of working out what free means. Evidence on zero-price is mixed outside consumer goods, so treat this as a B2B adaptation. Results are not public.

● Mixed evidence (as used here) · More on zero-price effect, with sources →

Context

Klaviyo UK pricing page, captured 16 Oct 2026. Allowances are shown in USD on the UK page.

Honest nudge or dark pattern?

Honest nudge

Honest nudge: the limits are explicit.

Steal this, honestly

If you have a free tier, lead with it and state its limits next to it.
Quote allowances in units buyers already plan in (profiles, sends).
Say when free support ends.

What to test: Free plan headline vs paid-plan-first. Measure signups and paid conversion at 90 days.

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: Klaviyo: Klaviyo leads with 'Start with a free plan' and lists the caps
Bias: Zero-price effect: 'Free' is treated as more than just a lower price.
Why it nudges: Klaviyo uses the zero-price effect, making free the headline rather than a footnote. Listing the caps beside it lowers the friction of working out what free means. Evidence on zero-price is mixed outside consumer goods, so treat this as a B2B adaptation. Results are not public.
Our verdict: Honest nudge. Honest nudge: the limits are explicit.
Source page: https://nudgeswipe.com/examples/klaviyo-free-plan-limits-up-front/ (JSON: https://nudgeswipe.com/api/teardowns/klaviyo-free-plan-limits-up-front.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 klaviyo.com, 16 Oct 2026
Shampanier, Mazar & Ariely (2007), Zero as a special price. doi.org/10.1287/mksc.1060.0254

Klaviyo leads with 'Start with a free plan' and lists the caps

Why it nudges

Honest nudge

Apply this with your agent

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