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Glossary

Social proof

Social proof is evidence that other people have chosen, used or approved of something, such as reviews, testimonials, client logos and customer counts, which people lean on to decide what to do when they are unsure.

  1. Independent reviewsA third party asks the client
  2. Filmed testimonialA face and a voice, hard to invent
  3. Written testimonialTheir words, name, role and company
  4. Client logosWho hired you, with no detail
  5. Counts and badges“500+ teams”, with no way to check
Forms of social proof on a services site, top first by how easily a reader can check them.

Social proof in detail

Also called
Customer proof, Proof points, Consensus principle
Topic
Growth
Updated

What it is

The idea comes from Robert Cialdini’s work on persuasion: when people are uncertain, they look at what others like them have done. On a website that evidence takes a few forms. Reviews and ratings gather many people’s verdicts. A testimonial gives one named person’s account in their own words. Logos and customer counts show who has signed up, and a case study shows the work done for a named client.

Its weight depends on two things: how like the reader the other people are, and whether the reader can check it. A quote from a head of marketing at a company the reader recognises, linked to the project it describes, carries more than an unsigned line of praise or a badge that says “trusted by 500 teams”.

Why it matters

Hiring an agency or buying B2B software means trusting a claim before you can test it. Social proof lets the buyer borrow the judgement of someone who already took that risk, and a page without it asks the reader to take the company’s word alone. It also has legal edges. A US Federal Trade Commission rule announced in August 2024 bans fake reviews and testimonials, AI-written ones included, and reviews paid for on condition that they are positive.

How we do it

Our reviews page holds what clients have said about working with us. The written quotes are printed as each client sent them. The filmed testimonials are written out beneath the films, lightly cleaned of false starts and repeats. Every person is named with their role and company, and the films’ text links to the case study where there is one.

The page prints no star rating or review count and declares no review markup, because search engines do not accept it from a company about itself. For independent reviews it links to our Clutch profile, where Clutch speaks to the client and publishes what they say. On the pages we design, proof goes next to the claim it supports.

An example

Say a data platform’s pricing page promises setup in a day, and the only proof is a strip of customer logos at the bottom. The redesign puts one quote directly under the promise, from a customer’s head of data: “We had our first dashboard live by lunch.” It carries her name, role and company, and links to the case study. The logos move to the footer, where they do the smaller job of showing who uses the product.

Common mistakes

  • Editing the quote into marketing copy. A testimonial rewritten in the company’s voice stops sounding like a person, and readers notice.
  • Marking up your own reviews for stars. Google makes pages ineligible for review stars when the business controls the reviews about itself, including ones shown through an embedded third-party widget.
  • Leaning on logos. A logo shows that a company hired you and says nothing about what you did or how it went.
  • Putting the proof far from the claim. A quote about speed belongs beside the line that promises speed, and a wall of quotes at the end of the page backs up nothing in particular.

Social proof vs testimonials

Social proof is any evidence that others chose or approved of something, and a testimonial is one form of it: a named person’s own account of their experience.

Social proofTestimonials
CoversReviews, ratings, logos, counts, testimonialsOne person’s account
Comes fromMany people, often countedOne named customer
Collected byThe company or a third partyUsually the company itself
Strongest whenMany people like the reader agreeThe speaker is like the reader

Questions

What people ask about social proof.

  1. Social proof on a website includes customer reviews and star ratings, testimonials with a name and role, client logos, case studies, customer counts, links to independent review sites such as Clutch or G2, and press mentions. For a services business, named testimonials and independent reviews usually carry most weight, because a reader can check who said them.

  2. You can add the markup, but Google will not show review stars for it. Its review snippet guidelines make pages ineligible when the business being reviewed controls the reviews about itself, whether they are written on the page or shown through an embedded third-party widget. A services firm’s ratings belong on independent review sites.

  3. In the US, no. The Federal Trade Commission’s rule on reviews and testimonials, announced in August 2024, bans fake reviews, including ones generated by AI, and bans paying for reviews on condition that they are positive or negative. Reviews from staff must disclose the connection. Check the rules in each country you sell to.

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