What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
Yes you can setup a payment form that sells/offers subscriptions. Just keep in mind though that the subscription should be handled/managed on your end via the Payment Gateway you will use (e.g. Paypal, Stripe, Square, etc.)
Here's a complete list of all payment processors we integrate with: https://apps.jotform.com/category/payment_processing
If all you need is some sort of Payment Authorization (e.g. charge your users at a later date), then your choices would be limited to Stripe, Paypal or Authorize.net.
Complete guide: How-to-Enable-Payment-Authorization
In case you're not sure which one will work for you, I recommend reading this article: Which-Payment-Processor-is-Right-for-Your-Business