How did you set the price for your product?

Our team is developing a SaaS called SaveDay. The first phase of building the product is complete, and we're now transitioning to the phase of setting the price. This is an incredibly challenging task, particularly when it comes to defining the willingness to pay. It's a desperate struggle to understand how much customers will be willing to invest in the product =(((((

How have you navigated the process of defining the willingness to pay for your SaaS product? What strategies have you found to be effective in this difficult task?