Different PayPal Checkout for WooCommerce (read brief)

I want to use a different paypal checkout plugin or service like our competitor use. My competitor website is www.coursesfast.com , They sell copyrighted materials so I they cant use paypal plugin directly. So They use a paypal plugin which hides the product name and use a third party i think. Could someone help me to find which service they use and help me to use similiar gateway. You can find more details when you try to do a checkout with a product. THanks in advance