Seven kinds of proof work without formal case studies: a named customer, a short quote, a specific number, a before and after, usage figures, third-party signals, and a worked example of your method. Proof is often missing. In Outfly's Growth Gaps 2026 sample, no case study, testimonial or client wording was found on 30 percent of 628 UK company websites.
A buyer who does not know you needs a reason to believe the claims on your page. Without proof, every claim reads as an opinion about yourself. With it, the same claim reads as something that happened.
In Outfly's Growth Gaps 2026 report, a keyword scan of 628 UK company websites found no wording about case studies, testimonials or clients on 30 percent of them (189 sites). Among UK startups the share was 40 percent (129 of 325). The full figures are in the report.
Put each piece of proof beside the claim it supports. The homepage headline, the pricing page and any page paid traffic lands on all need proof in the first screen. Write proof as text as well as logos, because a wall of logo images is harder for search engines and AI assistants to read, and some visitors skim straight past it.
Use only names and numbers you have permission for and can substantiate. A single result a buyer can check is worth more than several they cannot.
If visitors are arriving and leaving, start with this guide. If you are paying for traffic that does not convert, see paid costs more than it returns.
Track by Outfly builds the pages a campaign needs, with proof on them, in its first two months. Book a call and we will draft a first FlightPlan for your business, yours to keep either way.
Figures from Outfly's Growth Gaps 2026 report: an AI-assisted assessment on 21 September 2026 of 820 operating companies with live websites, 628 in the UK, drawn from Outfly's own prospect list, so not a representative sample. Each figure counts only companies where a value was known. Full method.