Website Tech Stack Detector

Detect the full technology stack of any website — frameworks, CMS, CDN, analytics, payment processors, hosting platforms, and 80+ more technologies. No API key needed.

What it detects

Category	Examples
JavaScript Frameworks	React, Vue.js, Angular, Svelte, Alpine.js, HTMX, jQuery
CSS Frameworks	Bootstrap, Tailwind CSS, Bulma, Foundation
CMS	WordPress, Drupal, Joomla, Ghost, Wix, Squarespace, Webflow
E-commerce	Shopify, WooCommerce, Magento, BigCommerce
Static Site Generators	Next.js, Nuxt.js, Gatsby, Hugo, Jekyll, Astro
CDN	Cloudflare, Fastly, Amazon CloudFront, Akamai
Hosting / Platform	Vercel, Netlify, Heroku, Fly.io, Render
Web Servers	Nginx, Apache, LiteSpeed, Caddy, Microsoft IIS
Analytics	Google Analytics, Mixpanel, Segment, Amplitude, Plausible, Matomo
Tag Managers	Google Tag Manager
Customer Support	Intercom, Zendesk, Drift, Crisp, LiveChat, Tawk.to
Payment	Stripe, PayPal
Marketing	HubSpot, Mailchimp
Error Tracking	Sentry, Datadog, New Relic
A/B Testing	Optimizely, Google Optimize, LaunchDarkly
Maps	Google Maps, Mapbox
Fonts	Google Fonts, Adobe Fonts
Icon Libraries	Font Awesome
Security	Sucuri
Programming Languages	PHP, Java, ASP.NET

How it works

The actor analyzes multiple signals to identify technologies:

1. HTTP Headers — Server, X-Powered-By, CDN headers, platform-specific headers
2. HTML Content — Meta generator tags, framework-specific DOM markers, class patterns
3. Script Sources — JavaScript library CDN URLs, inline script patterns
4. CSS References — Framework stylesheet URLs
5. Cookies — Session cookie names that reveal server-side technology

Each detection includes a confidence level (high or medium) and the source of detection.

Output format

Each result includes:

• url — The analyzed URL
• technologyCount — Total technologies found
• technologies — Array of detected technologies, each with:
  • name — Technology name (e.g., "React")
  • category — Category (e.g., "JavaScript Framework")
  • version — Version if detected (e.g., "18.2.0")
  • confidence — Detection confidence ("high" or "medium")
  • source — How it was detected (e.g., "script src", "HTTP header")
• categories — Technologies grouped by category
• summary — Quick highlights

Use cases

• Sales & Lead Enrichment — Know what tech your prospects use before you pitch
• Competitive Intelligence — Understand competitors' technology choices
• Market Research — Analyze technology adoption across industries
• Security Audits — Identify outdated or vulnerable technologies
• Web Development — Reverse-engineer tech stacks for migration planning
• SEO Analysis — Identify CMS and analytics tools on any site

FAQ

Q: Do I need an API key? A: No. The actor works with any public website. Just enter a URL.

Q: How many URLs can I analyze at once? A: Up to 100 URLs per run.

Q: Does it detect version numbers? A: Yes, when available. Version detection works for many JavaScript libraries and frameworks loaded via CDN.

Q: What's the difference between "high" and "medium" confidence? A: "High" means the technology was identified by a definitive marker (specific header, CDN URL). "Medium" means it was found via pattern matching in HTML or inline scripts, which may occasionally produce false positives.

Q: Is this legal? A: Yes. The actor only reads publicly available HTTP headers and HTML content — the same information your browser sees when visiting a website.

Q: How does this compare to Wappalyzer or BuiltWith? A: Similar concept, but pay-per-use pricing instead of monthly subscriptions. Ideal for one-off checks or integration into automated workflows.

Q: Can it detect server-side technologies? A: Partially. Server-side tech is detected when it reveals itself through HTTP headers (e.g., X-Powered-By: PHP) or cookies (e.g., PHPSESSID). Technologies that don't expose any client-side signals cannot be detected.

Q: Does it work with JavaScript-heavy single-page apps? A: Yes. It detects React, Vue, Angular, and Svelte through their DOM markers, even on SPAs. However, it uses static HTML analysis — it does not execute JavaScript.