Top fraud prevention tools for e-commerce include Sift, Signifyd, Riskified, SEON, Kount, Accertify, ClearSale, NoFraud, Forter, and Adyen RevenueProtect. They mainly use real-time transaction monitoring, AI/ML risk scoring, and device fingerprinting to detect fraud. Signifyd, Forter, and Riskified are strong in chargeback protection and automation, Sift focuses on behavioral AI, while SEON and Kount are best for device fingerprinting and account takeover prevention. All support scalability and compliance like PCI-DSS, GDPR, and SOC 2, but differ in focus between chargeback guarantees, identity intelligence, and AI-driven risk analysis.