How many testimonials should a landing page show?

In 2006, economists Judith Chevalier and Dina Mayzlin published a study in the Journal of Marketing Research analysing the effect of customer reviews on book sales at Amazon and Barnes & Noble (Chevalier & Mayzlin, 2006). Their central finding: it isn't just the average rating that drives sales, but also the volume of reviews available — a product with many reviews, even at a slightly lower rating, can outsell a product with very few reviews and a perfect score, because the volume itself acts as proof of reliability.

What this means for a landing page

A landing page never displays hundreds of reviews the way an e-commerce product page does — it selects a small number, chosen for their persuasive weight rather than statistical completeness. The volume principle still translates, though: mentioning an overall figure ("rated 4.8/5 by 340 customers") before unfolding three or four detailed testimonials combines both mechanisms — the volume reassures on statistical reliability, the selected testimonials illustrate the concrete transformation.

The optimal number of detailed testimonials

Three to five detailed testimonials cover most of the effective landing pages we've observed across our templates. Below three, a visitor may suspect an unrepresentative selection; beyond five to seven, attention dilutes and each additional testimonial catches the eye less than the previous one — a diminishing-returns effect close to the one documented for the number of pricing options in our article on the paradox of choice.

Diversify rather than accumulate

Past a certain number, it's better to diversify formats than to pile up more testimonials of the same kind: a text testimonial with photo and full name, an aggregate figure (satisfaction rate, number of customers), a recognised client logo, and — when relevant — a short video. This diversity covers the seven types of social proof detailed in our dedicated guide, without ever depending on a single format a sceptical visitor might dismiss as fabricated.

Where to place testimonials on the page

• A short testimonial near the hero, to reassure within the first seconds without slowing down the headline.
• The main testimonial block after the Desire section (see our AIDA guide), right when the visitor is looking for proof of what was just promised.
• One final testimonial just before the conversion CTA, to remove the last doubt at the moment the decision happens.
• The aggregate figure (rating, number of customers) in a section header or footer, visible without active reading.

Fake testimonials: the risk that cancels out every benefit

A made-up or vague testimonial (first initial only, no verifiable context) produces the opposite of the intended effect the moment a seasoned visitor spots it — and visitors are increasingly good at spotting it. A full name, a role or company when relevant, and wording that sounds like a real spoken sentence rather than an ad slogan: these three details separate a credible testimonial from one that raises doubt, regardless of how many you show.