Amazon and eBay are two of the largest online marketplaces, providing platforms for businesses and individuals to sell a wide range of products. Amazon is known for its vast product catalog, streamlined fulfillment services, and customer-centric approach. eBay focuses on auction-style listings alongside fixed-price options, offering a mix of new, used, and collectible items. Both marketplaces enable global reach, making them essential platforms for e-commerce sellers looking to scale their business.