There are a bunch of different paths you could take. If I were doing it, I would focus on a market-place model with ready-made technology to start and build proof of concept. Launching a grocery e-commerce platform in the USA involves choosing between marketplace and inventory-based models, with the marketplace approach offering lower initial investment and faster expansion potential through partnerships with existing stores. For a streamlined entry, consider adopting Shopify paired with grocery-specific apps like Freshline or Mercato Pro, which provide essential features while minimizing development costs. Your implementation should follow a focused roadmap: begin with targeted market research to identify your audience and geography, develop a minimum viable product featuring core functionalities, establish strategic partnerships with local grocery stores, implement a reliable delivery system, and start with a controlled soft launch in a limited area before expanding based on performance data and customer feedback.