One-click upsells after checkout, on the saved card

The post-purchase upsell appears after the shopper has paid but before they reach the thank-you page. Because payment is already complete, the offer cannot interrupt or reduce checkout conversion — the sale is banked. If the shopper accepts, the extra item is charged to the card they just used, with no re-entered payment details. One click, and it ships with the original order.

This is the placement with the highest lift-per-view in most stores, precisely because the friction is near zero. UpsellEngine picks the offer with the same AI that powers the rest of the journey, and you can rank those offers by profit margin rather than headline price using the Profit Optimizer.

The honest catch is that Shopify controls when the post-purchase step is allowed to appear, and it is skipped for a meaningful share of orders — wallet and pay-later methods, gift cards, digital-only orders, and a few other cases listed below. We surface that plainly rather than let you assume every order will see an offer, because a post-purchase upsell you misunderstand is worse than one you plan around. When the step is supported, it is genuinely one click: no re-entered card, no second checkout, and the item ships with the original order.