Social Proof
People look to others like them to decide what to do; show comparable buyers who already chose you.
Two other regional clinics your size switched last year, here's what happened
Social proof is the tendency to decide what is correct by looking at what similar people do. Robert Cialdini sets it out in Influence: The Psychology of Persuasion (1984). In selling, evidence that comparable buyers already chose you lowers a prospect’s perceived risk.
To use it, match the proof to the buyer: a case study from their industry and size beats a logo wall of famous names they cannot relate to. “Two other regional clinics your size switched last year, here’s what happened” carries weight because the buyer sees themselves in it. Specific numbers and named, relatable examples work better than vague claims of popularity.
It works best when the reference is close to the buyer’s own situation and genuinely verifiable. The mistake is generic or inflated proof (the “10,000+ happy customers” banner) which feels like marketing noise and proves nothing about their case.