How to Build a Price Comparison Website with Web Scraping

Price comparison sites make money through affiliate links. Here is how to build one. Architecture Cron Job → Scrapers → Database → Frontend ↓ [Amazon, Walmart, eBay, etc.] Multi-Store Scraper async function comparePrice ( product ) { const [ amazon , walmart , ebay ] = await Promise . allSettled ([ scrapeAmazon ( product ), scrapeWalmart ( product ), scrapeEbay ( product ) ]); return [ amazon . status === " fulfilled " ? amazon . value : null , walmart . status === " fulfilled " ? walmart . value : null , ebay . status === " fulfilled " ? ebay . value : null ]. filter ( Boolean ). sort (( a , b ) => a . price - b . price ); } Monetization Amazon Associates (4-8% commission) Walmart Affiliate Program eBay Partner Network Display ads (Google AdSense) E-Commerce Scraping Guides Amazon Walmart eBay Shopify Complete Index Need a price comparison system built? $100-500. Email: Spinov001@gmail.com | Pricing