Is Stride completely free?

Hello there, I'm curious about Stride and I was wondering if you could clarify something for me. The information I've come across mentions Stride as a potential solution for managing expenses and invoices, but I'm unsure about the cost. So, is Stride completely free to use, or are there any fees associated with it? And if there are fees, could you provide a brief overview of what they entail? I'd really appreciate your help in understanding this aspect of Stride.