Besides Shopify, many successful sellers use platforms like WooCommerce for its customization, BigCommerce for scalability, Squarespace for design, and Wix for user-friendliness. Marketplaces like Amazon, Etsy, eBay, and Walmart also offer brand-building opportunities with large customer bases. Facebook and Instagram Shops are growing popular for direct social selling, providing multi-channel expansion beyond Shopify. Many Shopify sellers successfully diversify by combining these platforms to expand reach and increase sales.