I'm going to say something the entire marketplace development industry doesn't want you to hear. The biggest risk in building a marketplace isn't the technology. It's the questions nobody asks before the technology starts. Who moves first — buyers or sellers? How does a transaction actually happen, step by step? Where does your cut come from? How will you handle trust between two strangers? What is the minimum flow that creates real value? These questions sound simple. They're not. And the teams that skip them always end up answering them later — at a much higher cost. At U1CORE we've worked on marketplace products across different industries. The pattern is consistent: the projects that go smoothly are the ones where these conversations happened first. The ones that struggle are the ones where they didn't. No sprint will save you from a wrong assumption. No UI kit will solve a chicken-and-egg problem you haven't acknowledged. The most valuable work in marketplace building happens before anyone opens Figma. If you're planning to build one — start there.