Without external funding you will need to find a customer that will back you. What I mean is, an account that is large enough to pay for the three of you to con

Without external funding you will need to find a customer that will back you. What I mean is, an account that is large enough to pay for the three of you to continue to build out the platform + will expand + is a known logo you can use and will work with you for marketing purposes (case study, referrals/references, webinars, conferences, etc.). The tricky part is finding the right "design partners" that can back you financially and help with marketing, while not totally derailing your roadmap. You need to make sure you continue to build for your total addressable market, not just your top paying customers.