From your phrasing, it seems like you've made up your mind that you don't want to offer one - and looking for validation on that thought. That said.... How are

From your phrasing, it seems like you've made up your mind that you don't want to offer one - and looking for validation on that thought. That said.... How are you acquiring your customers currently? How much context do they have about the product and how it fits their issues. Do they "stumble on you", search for you, referred by friends, etc? That does matter in their trust of you - and what they're willing to part with. You can always test options like "buy now, we'll charge in 14 days", "money back guarantee, etc".