Relevance experiments
Compare generic proof against industry-, role-, problem-, or outcome-matched proof.
Specificity experiments
Compare praise-only testimonials with versions that include timeframe, measurable result, or before-and-after context.
Placement experiments
Test proof in the hero, beside pricing, before forms, inside forms, near checkout, and after objections.
Format experiments
Compare short quote, long story, video, metric card, case-study summary, and verified-result formats.
Sequence experiments
Test whether proof works better before the offer, after the claim, before the CTA, or as reassurance after commitment.
Measurement rule
Run one bounded change at a time where possible and define the primary action before reading results.
Trustko Experiments™
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Educational content only. Results vary by business, offer, traffic, market, implementation, and customer behavior.