Stack Spy door Stack-Spy

Detect the full tech stack of any website — frameworks, analytics, CDN, payments and more.

Stack Spy scans any website you visit and reveals its complete technology stack in seconds.

🔍 What it detects
• Frameworks & libraries (React, Next.js, Vue, Angular…)
• Analytics & marketing (GA4, Segment, Mixpanel, HubSpot…)
• CDN & hosting (Cloudflare, Vercel, AWS CloudFront…)
• Payments (Stripe, PayPal, Braintree…)
• CMS & ecommerce (WordPress, Shopify, Webflow…)
• Security, fonts, chat widgets and 7,500+ more technologies

🚀 How it works
Open any website, click the Stack Spy icon. Detection runs locally in your browser — no page reloads, no tracking. Results are saved to a shareable public page at stack-spy.com/companies/[domain].

🔗 Features
• 7,500 detection patterns
• HTTP header analysis
• Shareable /companies/ pages
• Search by technology across all indexed sites
• Social profiles detected automatically