The Plug’n Pay gateway is compatible with many third party shopping carts. Shopify (and BigCommerce) is no longer supported, but we have a wide range of known compatible options.
Start with the list of shopping carts from our website (https://www.plugnpay.com/merchant-solutions/shopping-cart-solutions/)
If you need a more in-depth list or if you are looking for more specialized carts or apps we support, we can work to get that for you. Our Support Staff will be happy to help.