So you've got the idea. A B2B marketplace connecting suppliers, buyers, wholesalers, or service providers in one unified platform. The vision is clear. The opportunity is massive. And then reality hits. The global B2B e-commerce market is valued at over $26 trillion, nearly 5x the size of B2C e-commerce. Yet despite the enormous opportunity, most B2B marketplace launches struggle — not because the idea was wrong, but because of avoidable mistakes made early in the process. Wh