Your product might be able to solve problems that potential customers hire freelancers for. Find these customers on freelancing sites.
Alex Kehaya of ActionPages ($4,000/mo) found customers this way on Upwork. He searched for people looking to hire coders for specific tasks, then explained how his product could do the same job. Usefully, the customers had expressed interest in his service and set aside budgets for it ahead of time. In addition to Upwork, you can try this out on freelancing sites like Fiverr and Toptal.