Clearbit's growth experiments focused on testing the effectiveness of personalized social proof in increasing demo request conversions on their marketing site. The hypothesis was that tailoring social proof, such as logos and quotes, to match the firmographics of site visitors would improve conversion rates. Using Clearbit Reveal, the team identified visiting companies and dynamically displayed relevant logos and quotes on the website's footer. Initially, they observed a 43% increase in conversions with personalized logos alone. When personalized quotes were added, conversions surged by 84%, demonstrating the power of relevant social proof in marketing. The experiment underscored the value of showing prospects that similar companies benefit from Clearbit's services, thereby enhancing trust and interest. Despite initial skepticism, the results affirmed that personalized marketing efforts can significantly impact conversion rates, aligning with conventional wisdom about the influence of social proof. The team also noted that even without Clearbit's tools, businesses can still customize social proof by leveraging data through various channels, such as landing pages and emails, to effectively reach their target audiences.