CartFlows Pro offers one-click upsells when using the following gateways:
- iDeal via Mollie
- PayPal, with or without reference transactions
For PayPal, you must use the PayPal Checkout payment gateway plugin. Reference transactions is not a requirement.
One-click upsells needs exclusive compatibility built with each payment gateway and we will add support for other payment gateways one by one.
We are currently working on support for Square.