I Built an AI-Powered Price Comparison Tool That Searches 100+ Retailers Instantly

Have you ever spent 30 minutes opening tabs across Amazon, Best Buy, Walmart, and eBay just to find the best price on a laptop? I did too — so I built a tool to do it in seconds. What is ShopSmartAI? ShopSmartAI is an AI-powered price comparison platform that searches 100+ retailers in real-time and shows you the best deals — for both the US and Canada. You can search in plain English like "gaming laptop under $800 with RTX" and the AI understands exactly what you're looking for. The Tech Stack Here's what powers it: Frontend: Next.js 14 (App Router) on Vercel Backend: Node.js/Express on Railway Database: PostgreSQL with AI response caching (7-day TTL) AI: Gemini 2.5 Flash for natural language search and product spec generation Search Data: Google Shopping API via Serper.dev + Best Buy API Affiliate: Amazon Associates, eBay Partner Network, and more Key Features AI Natural Language Search Instead of keyword matching, the AI interprets what you actually want. Search for "best noise canc