A Shopify upsell A/B test compares a recommendation or offer experience for assigned shoppers and measures incremental order value without assuming every added item creates net value.
Choose a relevant offer
Base the recommendation on product compatibility, shopper intent, past baskets, or a clear use case. An irrelevant upsell can distract from the primary purchase and reduce conversion.
Test one part of the system
The product, price, placement, message, and interaction can each affect the result. Change one coherent strategy so the team can decide what to keep after the experiment.
Cover cart and inventory states
Check variants, stock, subscriptions, bundles, discounts, quantity updates, removed items, markets, and checkout. The offer must not add an incompatible or unavailable item.
Measure incremental value
Review revenue per visitor, average order value, margin, completed orders, product mix, and returns. An upsell that raises basket value but lowers purchase completion may reduce total value.
Run the test in Shopify
Sofcy supports URL, template, theme, and custom JavaScript API experiments.
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