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Juan Triviño
Juan Triviño

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Detect Any Website Tech Stack for Free - A BuiltWith Alternative

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")
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Free Automated Tool

I built a scraper that checks 50+ technologies across any list of websites. Pass a list of competitor URLs, get back their full tech stack as JSON.

Perfect for:

  • Sales teams: Know what prospects use before the call
  • Competitive analysis: Track what tools competitors adopt
  • Market research: Understand technology adoption trends

Try it free on Apify: Competitor Tech Stack Detector


What tech stack detective tools do you use? Share in the comments.

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