The article explains how instant payment rails require millisecond, pre-transaction fraud decisioning across payments and upstream events (logins, profile/payee changes), and it provides practical vendor selection criteria—rail/message readiness (e.g., FedNow/Faster Payments, ISO 20022), data needs, governance/auditability, and case workflow—alongside a comparison of platforms including Fraud.net, ComplyAdvantage, Trustpair, Feedzai, Sift, and SEON.