Abstract
Disclosed herein are system, method, and computer program product embodiments for using generative AI to support an upsell engine. A point-of-sale (POS) system may combine transaction data, merchant data, and consumer data into a shared embedding space comprising a numerical matrix. A machine learning model in connection with the POS system may generate an offer based on the shared embedding of the transaction data, consumer data, and merchant inventory data. The offer may be unique to the transaction. The POS system may prevent merchant data from being transmitted to a banking server, and may prevent consumer data from being transmitted to a merchant server. The POS system may output the offer.