FactCheck.org

The choice when you want the reasoning rather than a score. FactCheck.org, a project of the Annenberg Public Policy Center at the University of Pennsylvania, writes long explanations of what a politician or ad got wrong instead of stamping a rating on it, which suits readers who want to follow the evidence themselves. Its SciCheck strand covers science claims, including vaccines and COVID-19. Its funding page is among the most open in the field. It says it has never taken money from unions, names donors who give $5,000 or more in a year, and lists the exceptions to its no-corporate-money rule, including Meta's funding for debunking viral posts from 2017 to 2025.