How to Build a Competitor Tech Stack Auditor in 15 Minutes (Node.js + SnapAPI)

I wanted to know what technologies my top 5 competitors were using. Google it? Useless. Run Wappalyzer on each one manually? Fine for one site. But I had 50 sites and I wanted the results in a spreadsheet, not a browser tab. Here's the 25-line script I built. It runs in Node.js 18+ with no npm install, takes about 15 minutes to set up, and outputs a markdown table you can paste anywhere. What SnapAPI's /analyze endpoint returns The SnapAPI analyze endpoint runs a real Chromium browser against any URL and returns structured JSON in a single call: { "technologies": ["React", "Next.js", "Vercel", "Stripe.js"], "word_count": 1842, "primary_cta": "Start for free", "navigation": ["Products", "Solutions", "Pricing", "Docs"], "load_time_ms": 412 } One call. No Puppeteer setup. No DOM parsing. The tech detection covers 30+ frameworks and services — React, Vue, Next.js, Nuxt, Vercel, Cloudflare, Stripe, Intercom, Segment, and more. The full script // tech-audit.js // Audits competitor tech stack