🔧 Tech Stack Detector — What Any Website Is Built With

Feed it a list of domains and get back each site's full technology fingerprint: CMS, frameworks, analytics, ad pixels, payments, chat, marketing automation and CDN/hosting across 90+ tools — plus derived sales signals (hasEcommerce, hasPaidAds, sophisticationTier). For B2B sales teams doing technographic targeting, agencies, and integration partners. Pricing: $0.02 per domain enriched. No API key, no subscription — a keyless BuiltWith / Wappalyzer alternative.

🎥 Video walkthrough

BuiltWith alternative: how this compares

	This Actor	BuiltWith	Wappalyzer
Access	Keyless, run on Apify	Account + paid plans for lists	Account/extension; API for bulk
Bulk from your own list	Paste domains, one dataset out	List exports on higher tiers	Via paid API
Pricing	$0.02 per domain, pay-per-result	Monthly seat	Credits
Data depth	Live scan, 90+ tools, precision-first	Massive historical index	Large index
Derived sales flags	hasEcommerce, hasPaidAds, sophisticationTier built in	DIY from raw data	DIY

Honest read: BuiltWith's historical index (when a site adopted or dropped a tool) is something a live scan can't replicate — if you need adoption timelines, use BuiltWith. If you need "what does this list of 5,000 domains run today, cheaply, in one CSV", that's exactly this Actor.

How detection works (and why you can trust a flag)

Each site's homepage — plus one relevant internal page (/pricing, /checkout, /contact…) when fetchExtraPage is on — is fetched through a US residential proxy. Technologies are fingerprinted from HTML, script and link URLs, meta generators, cookies and response headers. Detection is evidence-based and conservative: a tool is only reported on a clear signal, so you get a low-false-positive stack instead of a wall of guesses. Precision over recall — consent-gated, server-side-only or first-party-proxied tools may stay invisible, same as with every client-side technographics scanner.

Categories covered

• CMS / builders: WordPress, Shopify, Wix, Webflow, Squarespace, Drupal, Ghost, HubSpot CMS, Contentful, Sanity…
• Frameworks: React, Vue, Angular, Next.js, Nuxt, Svelte, Gatsby…
• Analytics: GA4/UA, GTM, Segment, Mixpanel, Amplitude, Hotjar, Plausible, PostHog…
• Ad pixels: Google Ads, Meta, LinkedIn, TikTok, X, Pinterest, Snap, Bing UET, Reddit…
• Payments: Stripe, PayPal, Braintree, Square, Adyen, Klarna, Razorpay…
• Chat: Intercom, Drift, Zendesk, Crisp, Tawk.to, Gorgias…
• Marketing: Klaviyo, Mailchimp, HubSpot, Marketo, ActiveCampaign, Braze…
• Ecommerce: WooCommerce, Magento, BigCommerce, PrestaShop, Salesforce Commerce…
• CDN / hosting: Cloudflare, Fastly, CloudFront, Akamai, Vercel, Netlify, WP Engine…

Input and output

{
  "domains": ["stripe.com", "shopify.com", "notion.so"],
  "maxConcurrency": 5,
  "fetchExtraPage": true
}

domains (required) accepts bare domains or URLs. maxConcurrency up to 20. fetchExtraPage: true (default) meaningfully improves recall for payments and chat, which often load only off-homepage.

{
  "domain": "shopify.com",
  "technologies": [
    { "name": "Cloudflare", "category": "cdnHosting" },
    { "name": "Google Analytics (GA4)", "category": "analytics" },
    { "name": "React", "category": "frameworks" },
    { "name": "Shopify", "category": "cms" }
  ],
  "categoriesSummary": {
    "cms": "Shopify",
    "frameworks": ["React"],
    "analytics": ["Google Analytics (GA4)", "Google Tag Manager"],
    "cdnHosting": ["Cloudflare"]
  },
  "techCount": 5,
  "hasEcommerce": true,
  "hasPaidAds": false,
  "sophisticationTier": "growing"
}

Ships with a ready table view (domain, tier, tech count, ecommerce, paid ads, CMS) and exports to CSV, Excel, JSON or API — schema-stable and easy for an LLM agent to consume.

Technographic plays that actually close deals

• Platform-specific selling — filter cms = "Shopify" to find every Shopify store in your list; pitch your app/agency service only to them.
• Displacement — filter technologies for Intercom, Mailchimp or Marketo and pitch your alternative to accounts already paying for the category.
• Spend qualification — hasPaidAds: true means a live ad pixel: the company already buys acquisition. Warm signal for ads/analytics/landing-page tools.
• Routing by maturity — sophisticationTier (basic / growing / advanced) sends enterprise-y stacks to sales, thin stacks to self-serve.
• Buying-signal monitoring — schedule a weekly re-scan of a watchlist and diff: a prospect adding Stripe or a Meta Pixel is a timing trigger.

Downstream, spend contact credits only on accounts that pass the tech filter: Company Enrichment for firmographics and decision-makers, Website Contact Finder for emails and phones.

FAQ

How do I check what technology a website uses in bulk? Paste your domain list into this Actor and run — each domain returns a structured technology profile in one dataset. No extension, no per-site manual lookups.

Do I need a BuiltWith or Wappalyzer API key? No. Detection is fully self-contained; you only need an Apify account.

Why does a big site show only a few technologies? Sophisticated sites proxy scripts through first-party domains, gate tags behind consent, or keep tools server-side — invisible to any client-side scanner. We flag only what's confidently visible; fetchExtraPage usually surfaces more.

Can I find all sites using a specific tool, like Klaviyo? Yes — run your list, then filter the dataset where technologies contains Klaviyo (or Stripe, Intercom, Shopify…). The filtered set is your target list.

How accurate is it? Precision-first: a technology is reported only on clear evidence (script URLs, cookies, headers, markup). Expect very few false positives; the trade-off is that hidden tools can be missed — true of BuiltWith and Wappalyzer as well.

What does a 1,000-domain scan cost? $20 ($0.02 each), billed only for successfully enriched domains. No monthly fee.

Does it get blocked? Requests route through Apify residential proxies with rotation and retry on transient failures, which clears most datacenter blocks. Keep concurrency modest on very large lists.

Can I automate it end to end? Yes — schedule re-scans in Apify Console and push the dataset to Sheets, Slack, a webhook or your CRM; chain it between a domain source and the enrichment/contact Actors for a hands-off technographic pipeline.

---

Detection is signal-based and best-effort. Not affiliated with BuiltWith, Wappalyzer, or any detected technology.