Website Tech Stack Detector - Free BuiltWith & Wappalyzer Alternative

Detect 80+ technologies on any website in seconds -- frameworks, CMS, analytics, CDN, payments, marketing tools, and more. The best free alternative to BuiltWith ($295/mo), Wappalyzer ($250/mo), and SimilarTech. No API keys, no subscription required.

Who Is This For?

• Sales & SDR teams -- Identify prospects using specific technologies (e.g., find all Shopify stores using Stripe) for targeted outreach
• Competitive analysts -- Benchmark competitor tech stacks to understand their infrastructure choices
• Agencies & consultants -- Audit client websites and recommend technology upgrades
• Investors & VCs -- Due diligence on portfolio companies' technology maturity
• Developers -- Discover what frameworks and tools successful sites are built with
• Market researchers -- Analyze technology adoption trends across industries at scale

Technologies Detected (80+)

Category	Technologies
Frameworks	React, Next.js, Vue.js, Nuxt.js, Angular, Svelte, SvelteKit, Remix, Astro, Gatsby, Ember.js, Ruby on Rails, Django, Laravel, Express, FastAPI
CMS	WordPress, Shopify, Wix, Squarespace, Webflow, Ghost, Drupal, Joomla, HubSpot CMS, Contentful, Sanity, Strapi
Analytics	Google Analytics (UA & GA4), Hotjar, Segment, Mixpanel, Amplitude, Heap, Plausible, Fathom, PostHog, Clarity, Matomo
CDN & Hosting	Cloudflare, Fastly, AWS CloudFront, Akamai, Vercel, Netlify, Heroku, Firebase, GitHub Pages
Payments	Stripe, PayPal, Paddle, LemonSqueezy
Marketing	HubSpot, Intercom, Drift, Mailchimp, ConvertKit, ActiveCampaign
Chat & Support	Zendesk, Crisp, Tawk.to, LiveChat, Freshdesk
Advertising	Facebook Pixel, Google Ads, Google AdSense, Twitter Pixel, LinkedIn Insight Tag, TikTok Pixel, Pinterest Tag
JavaScript Libraries	jQuery, Lodash, Axios, Moment.js, GSAP, Three.js, Alpine.js, HTMX
CSS Frameworks	Bootstrap, Tailwind CSS, Bulma, Material UI, Chakra UI, Foundation
Tag Managers	Google Tag Manager, Adobe Launch
Fonts	Google Fonts, Adobe Fonts (Typekit), Font Awesome
Video	YouTube Embed, Vimeo, Wistia
Security	reCAPTCHA, hCaptcha, Cloudflare Turnstile
Servers	Nginx, Apache, LiteSpeed, IIS

Pricing -- Free to Start

Tier	Cost	What You Get
Free trial	$0	Apify free tier includes monthly compute credits
Pay per URL	~$0.01-0.05/URL	Full tech stack analysis per URL
vs. BuiltWith	Saves $295/mo	Same technology detection, no subscription
vs. Wappalyzer	Saves $250/mo	More technologies detected, bulk processing
vs. SimilarTech	Saves $199/mo	Real-time scanning, structured JSON output

How It Compares to Paid Tech Detection Tools

Feature	This Actor (FREE)	BuiltWith ($295/mo)	Wappalyzer ($250/mo)	SimilarTech ($199/mo)
Technologies detected	80+	50,000+	1,000+	10,000+
Real-time scanning	Yes	No (cached)	Yes	No (cached)
Confidence scoring	Yes (50-100%)	No	No	No
Category filtering	Yes	Limited	Limited	Limited
Security headers audit	Yes	No	No	No
Bulk URL processing	Unlimited	Plan-limited	Plan-limited	Plan-limited
API/automation	Yes (Apify API)	Yes ($795/mo)	Yes ($250/mo)	Yes
JSON/CSV/Excel export	Yes	Yes	Yes	Yes
Scheduling	Yes (Apify)	No	No	No
Monthly cost	$0 (pay per run)	$295-795	$250	$199

When to use this Actor: You want fast, real-time technology detection for sales prospecting, competitive analysis, or market research without paying hundreds per month for BuiltWith or Wappalyzer subscriptions.

Quick Start (3 Steps)

1. Click "Try for free" on this Actor's page in Apify Store
2. Paste website URLs (e.g., https://stripe.com, https://github.com)
3. Click "Start" and get a full tech stack breakdown as JSON, CSV, or Excel

Input

Field	Type	Default	Description
urls	string[]	required	Website URLs to scan
includeHeaders	boolean	true	Analyze HTTP headers for server/CDN/security info
includeMetadata	boolean	true	Include page title, description, favicon
categoryFilter	string[]	all	Only return specific categories (e.g., ["framework", "analytics"])
delayMs	integer	1000	Delay between requests in ms

Example Input -- Full Scan

{
  "urls": ["https://stripe.com", "https://github.com", "https://vercel.com"],
  "includeHeaders": true,
  "includeMetadata": true,
  "delayMs": 1000
}

Example Input -- Frameworks Only

{
  "urls": ["https://stripe.com", "https://github.com"],
  "categoryFilter": ["framework", "css-framework", "javascript-library"],
  "includeHeaders": false,
  "includeMetadata": false
}

Output Example

{
  "url": "https://stripe.com",
  "success": true,
  "technologiesCount": 12,
  "technologies": [
    { "name": "React", "category": "framework", "confidence": 100 },
    { "name": "Next.js", "category": "framework", "confidence": 100 },
    { "name": "Stripe", "category": "payment", "confidence": 100 },
    { "name": "Cloudflare", "category": "cdn", "confidence": 75 },
    { "name": "Google Tag Manager", "category": "tag-manager", "confidence": 100 },
    { "name": "Google Analytics 4", "category": "analytics", "confidence": 100 }
  ],
  "byCategory": {
    "framework": [
      { "name": "React", "confidence": 100 },
      { "name": "Next.js", "confidence": 100 }
    ],
    "payment": [
      { "name": "Stripe", "confidence": 100 }
    ],
    "cdn": [
      { "name": "Cloudflare", "confidence": 75 }
    ]
  },
  "metadata": {
    "title": "Stripe | Financial Infrastructure to Grow Your Revenue",
    "description": "...",
    "favicon": "/favicon.ico",
    "ogImage": "https://stripe.com/img/v3/home/social.png"
  },
  "securityHeaders": {
    "strict-transport-security": "max-age=63072000",
    "content-security-policy": "...",
    "x-content-type-options": "nosniff",
    "x-frame-options": "SAMEORIGIN"
  },
  "server": "cloudflare"
}

Real-World Use Cases

1. Sales Prospecting by Tech Stack

"Find me all companies using Shopify + Stripe" -- Bulk-scan prospect URLs to identify which ones use specific technologies, then prioritize outreach based on tech fit.

2. Competitive Tech Analysis

Scan your top 20 competitors to understand what frameworks, analytics, and marketing tools they use. Identify technology trends in your industry.

3. Technology Migration Planning

Before migrating from WordPress to Next.js, scan 50+ sites that already made the switch to understand common technology companions (CDN, analytics, etc.).

4. Agency Website Audits

Quickly audit a prospect's website and identify outdated technologies, missing analytics, and security gaps. Generate a tech audit report for your sales process.

5. Market Research at Scale

Scan 1,000+ websites in a vertical to produce technology adoption reports: "What percentage of e-commerce sites use Stripe vs. PayPal?"

6. Security Posture Assessment

Check security headers (HSTS, CSP, X-Frame-Options) across your portfolio of sites to identify which ones need security hardening.

Available Categories

Use these in the categoryFilter input to narrow results:

framework, cms, analytics, cdn, payment, marketing, hosting, javascript-library, css-framework, security, font, tag-manager, advertising, chat, video, database, server

FAQ

Q: How many technologies can this detect? A: 80+ technologies across 17 categories, with new technologies added regularly. Covers the most popular and business-relevant tools.

Q: How does confidence scoring work? A: Each technology has multiple detection patterns (HTML signatures, HTTP headers). Confidence reflects the percentage of patterns matched: 100% = all patterns found (definite), 50% = minimum one pattern found (likely). Higher confidence = more certain detection.

Q: Can I scan thousands of URLs? A: Yes. Processing scales linearly. Use the delayMs parameter to control request pacing. For 1,000+ URLs, consider setting includeHeaders: false for faster processing.

Q: Does this detect server-side technologies? A: Partially. Server-side frameworks are detected via HTTP response headers (e.g., X-Powered-By: Express) and HTML fingerprints. Pure backend technologies without client-facing signatures are not detectable.

Q: How does this compare to BuiltWith? A: BuiltWith has a larger technology database (50,000+) built over 15+ years with historical data. This Actor detects 80+ of the most business-relevant technologies in real-time, for free. For most sales prospecting and competitive analysis, 80+ technologies covers 95%+ of practical use cases.

Q: Can I schedule regular scans? A: Yes. Use Apify's built-in scheduler to monitor technology changes over time. Track when competitors adopt new tools or switch frameworks.

Pricing

Pay Per Event -- charged per URL scanned. Typical cost: $0.01-0.05 per URL depending on response time. Free Apify tier available for testing.