I built a competitor pricing monitor in 3 days, here's how it actually works

I lost a deal last month. Prospect told me my competitor had dropped their pricing two weeks earlier. Found out during a live demo. Looked completely unprepared. Started looking for a tool to automate this. Found Visualping, alerts on every pixel change, completely noisy. Found enterprise tools at $500+/year. Nothing in between. So I built one. The stack Next.js 16 (App Router) Playwright for scraping Supabase for storage Resend for emails vercel for hosting and cron worker The hardest part: sig