Fraud prevention, Riskified vs Signifyd vs Sift?

All three are good. They differ on pricing model, chargeback guarantee, and fit by AOV.

• Riskified, chargeback guarantee on every approved order. If a guaranteed order charges back, Riskified pays. Pricing is a % of GMV (typically 0.6-1.2%) and you get a hard SLA. Best fit: $1k+ AOV jewellery + watches. The financial risk shifts off the brand entirely. I default to Riskified for diamond + bridal DTC at $5M+ GMV.
• Signifyd, also chargeback-guarantee. Slightly cheaper for mid-AOV (typically 0.4-0.9% of GMV). Strong on item-not-received fraud which matters for jewellery. Best fit: $500, $5k AOV mainstream fine + fashion jewellery. Solid Magento integration via official extension.
• Sift, risk-scoring + decision-engine, NOT chargeback-guarantee. You build your own decline + manual-review rules using Sift’s scores. Cheaper (~$0.05, $0.20 per order). Best fit: brands at <$2M GMV who want a cheap fraud layer + are comfortable owning the chargeback risk. Or as a layer in front of Riskified to filter obvious junk before paying for the guarantee.

The pattern I deploy at most $5M+ jewellery brands: Sift for first-pass scoring (free-tier filter on bot + obvious-fraud orders) → Riskified for guaranteed approval on the orders that pass Sift → 3-D Secure 2.0 for the borderline grey-zone. Layered, not either/or. Cuts net chargeback losses 75-90% in the books I’ve audited.