JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Unfortunately, we don't have an integration with Sage, but I have sent a request on your behalf to consider Sage Payment Solutions for payment integration with JotForm. So, If this gets implemented, you will be notified via this thread.
Open new thread if you need anything else, we will be glad to assist you.