Upselling is a process where a seller tries to convince the customer to purchase a more expensive item, upgrade, or add-on. In eCommerce, upselling generally happens after the customer has already decided on a purchase and is about to complete the transaction. The most common type of upselling is when the seller recommends a higher-priced version of the same product. But what is the best free upsell app Shopify? We’ve compiled a list of 15 of the best free Upsell app Shopify for 2022, so you can start generating more revenue for your store today.