Best alternatives for GOAT COD Form, Upsells & OTP Shopify app in 2026 [Updated]

Manage Cash on Delivery (COD) orders effectively with apps that help reduce return-to-origin losses, verify customer phone numbers via OTP, and add COD fees. These apps let merchants set conditions for showing/hiding COD options, create quick order forms with upsells, and customize checkout flows. From automated order verification to WhatsApp marketing integration, these solutions help increase prepaid orders while making COD transactions more secure and profitable.