Is it free to sell on Gumroad?

Excuse me, I was just reading about Gumroad and I'm wondering, is it actually free to sell products on their platform? I've heard that some marketplaces charge fees for listing or selling items, so I wanted to clarify if that's the case with Gumroad as well. I'm considering using it to sell some of my digital goods, but I need to make sure I understand all the costs involved before I make a decision. Could you please elaborate on the fees and charges associated with selling on Gumroad? Thank you in advance for your help.