The best platform for building a marketplace app depends on your specific needs and resources. Custom development offers the most flexibility for creating a unique and complete marketplace app, but it's costly and requires a skilled development team.
SaaS solutions like Sharetribe or Marketplacer are cost-effective and quicker to launch, ideal for those with limited technical resources. Conduct thorough market research to understand your target audience and choose a marketplace platform that aligns with your business model, supports secure payment systems, and can scale as your online marketplace business grows.