Sezzle

The Sezzle integration adds Pay in 4, Pay in 2, Pay in 5, and Pay Monthly buy now, pay later options to UltraCart checkout, with the merchant paid in full upfront and Sezzle assuming all credit and fraud risk. Sezzle reaches a younger, credit-conscious shopper base and reports an 88% approval rate, 14% share of checkout for participating merchants, and an average 22% order value lift across its network.

Sezzle is a publicly traded BNPL company (NASDAQ: SEZL) founded in 2016 and headquartered in Minneapolis. The platform is PCI DSS Level 1 certified, licensed under NMLS #1950862, and serves shoppers through an app that has been downloaded more than 11.9 million times. Sezzle is also the only major BNPL provider with a built-in credit-building feature, Sezzle Up, which reports on-time payments to credit bureaus and helps younger buyers build a credit history while shopping.

Offering BNPL through a third-party app usually means another monthly fee, another vendor relationship, and a redirect that drops conversion. UltraCart's Sezzle integration is built directly into the checkout flow as an Additional Payment Method: merchants paste a Business ID, Public Key, and Private Key from the Sezzle dashboard into UltraCart payment settings, set the environment to Live, and Sezzle renders inline alongside cards and PayPal. Forrester's Total Economic Impact study of Sezzle merchants reports a 50% boost in average order value, a 40% drop in cart abandonment, and a 110% ROI on the program.

The integration includes Visual Builder marketing elements pre-installed in current UltraCart themes (Elements 2.05+, Hero 1.07+, Jewel 1.04+, Lifty 1.05+, Native 1.05+, Natural VB 1.05+, and Poppy 1.00+), so merchants can promote "4 interest-free payments" messaging on product and cart pages before shoppers reach checkout. Sezzle requires multi-page checkout and is not compatible with auto orders, upsell-after offers, or rotating gateway configurations, so it pairs best with merchants running standard one-time orders and looking to widen their addressable audience.