Why Know Your Competitors Tech Stack? Knowing what technologies your competitors use gives you strategic advantage. BuiltWith charges $295/month for this. Wappalyzer has limits. What You Can Detect With the right approach, you can identify: Frontend : React, Vue, Angular, Next.js, Svelte, Tailwind CMS : WordPress, Shopify, Wix, Squarespace, Webflow Analytics : Google Analytics, Hotjar, Mixpanel, PostHog, Segment Marketing : HubSpot, Intercom, Mailchimp, Klaviyo Hosting : Cloudflare, AWS, Vercel, Netlify Payments : Stripe, PayPal, Square Support : Zendesk, Crisp, Tawk.to How It Works The detection is based on HTML signatures - specific patterns in the page source that reveal what tools are running: # Example: detecting React if " react.production.min.js " in html or " __NEXT_DATA__ " in html : print ( " React detected " ) # Example: detecting Stripe if " js.stripe.com " in html : print ( " Stripe detected " ) Enter fullscreen mode Exit fullscreen mode Free Automated Tool I built a scraper that checks 50+…