Does PayPal payment integration charge processing fees?

I was wondering if when I use a payment integration, such as paypal, that they still charge their own processing fee? I know to use your platform it is so much money, but would paypal charge the customers purchasing items from one of my forms?

Thanks!

Chris

According to PayPal's support, they do not charge processing fees: https://www.paypal.com/us/smarthelp/personal/article/what-are-the-fees-for-paypal-accounts-faq690 

So, you can integrate with PayPal if you want to: https://www.jotform.com/help/391-How-to-Integrate-Form-with-Paypal-Standard-