Some entrepreneurs validate customer need through years of having lived the problem. Others go native with users — survey and interview them, show mocks and prototypes, do demand testing by “selling” or advertising a product they haven’t built yet, even get customers to partner and co-develop with them. There’s no replacement for shipping a product and getting adoption, engagement and revenue data. But that is often expensive (especially for an enterprise-quality product), and getting feedback and direction along the way is incredibly valuable. What’s your feedback cycle? How will you convince yourself, and a VC, that the opportunity is real? You don’t need that much money to get useful feedback.