Do your payment processors support subscriptions?

Est-il possible avec vos formulaires de faire des paiement en plusieurs fois ? Paiement en 2 fois, 3 fois etc etc. Est-ce possible ?

Yes, you can set up 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.)

Related guides:

How-to-Setup-a-Recurring-Payment-Option

Order-Form-Basics 

Here's a complete list of all payment processors we integrate with: https://www.jotform.com/integrations/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