You’re not paying 5-8% per sale to a marketplace, and you build a direct relationship with buyers that no platform can take away. Competing against regional giants requires a professional online presence you own. This guide walks you through choosing a platform, building product pages that sell, handling payments and compliance, and the logistics that keep customers happy. Choose Shopify (S$29–299/month, no-code, fastest launch) for speed to market, WooCommerce (free plugin, S$5–50/month hosting, requires technical skill) for customisation, or headless commerce (Medusa, BigCommerce) if you plan to sell across web, app and social channels simultaneously. Comply with Singapore’s PDPA regulations from day one: obtain explicit consent before collecting customer data, display transparent privacy policies and use SSL encryption on all pages.