Does Step charge a fee?

I'm curious to understand if Step imposes any kind of fee on its users. I've heard great things about their platform and am considering using it for my cryptocurrency transactions, but I want to make sure I'm aware of all potential costs. Could you please clarify if Step does indeed charge a fee, and if so, what the specifics of that fee structure might be? I'm eager to get a clear understanding of any potential expenses involved in utilizing their services.