Tech Stack Detector: BuiltWith & Wappalyzer Alternative for Bulk Website Technology Lookup

Find out what any website is built with, for thousands of sites at once. Paste domains or URLs and get one clean row per website listing its technologies, grouped into ready-to-filter columns: CMS (WordPress, Webflow, Wix, Squarespace...), e-commerce (Shopify, WooCommerce, Magento, BigCommerce...), analytics (Google Analytics, GTM, Segment, Mixpanel, Hotjar...), ad pixels (Meta, Google Ads, TikTok, LinkedIn...), marketing tools (HubSpot, Klaviyo, Marketo, Mailchimp...), live chat (Intercom, Zendesk, Drift, Gorgias...), payments, cookie consent, CDN, hosting (Vercel, Netlify, WP Engine...) and frameworks (Next.js, React, Vue, Rails, Laravel...).

240+ hand-written fingerprints across 55 categories, with versions where the site exposes them. It makes one fast HTTP request per site and uses no browser, so 1,000 websites take a few minutes and cost a fraction of BuiltWith or Wappalyzer API plans. There's no API key or subscription.

Who uses it

• Sales and lead-gen teams. Build lists like "Shopify stores using Klaviyo but no reviews app" or "WordPress sites without a cookie banner", then pitch the tool they're missing.
• Agencies and freelancers. Find prospects on outdated stacks (Wix, Weebly, old jQuery) for redesign and migration offers.
• SaaS companies. Track competitor adoption and find customers of competing tools for displacement campaigns.
• Investors and market researchers. Measure technology market share across a list of companies.
• Data enrichment. Add tech stack columns to your CRM accounts.

Input

Field	Description
websites (required)	Domains, URLs or emails, one per line. Duplicates are removed.
maxItems	Analyse only the first N (for testing).
chargeBlockedSites	Off by default: sites that block bots return free rows with header-only results.
maxConcurrency, requestTimeoutSecs	Advanced tuning.

{ "websites": ["notion.so", "hubspot.com", "techcrunch.com", "https://www.allbirds.com"] }

Output (one row per website)

Real result from a test run on 2026-10-30 (shortened):

{
  "input": "notion.so",
  "status": "ok",
  "httpStatus": 200,
  "finalUrl": "https://www.notion.com/",
  "domain": "notion.com",
  "pageTitle": "The AI workspace that works for you. | Notion",
  "techCount": 7,
  "technologyNames": ["Cloudflare", "Contentful", "Vercel", "Next.js", "React", "Cloudflare Bot Management", "Tailwind CSS"],
  "technologies": [
    { "name": "Next.js", "category": "JavaScript framework", "version": null, "detectedVia": "html" },
    { "name": "Vercel", "category": "Hosting", "version": null, "detectedVia": "header:x-vercel-id" }
  ],
  "cms": ["Contentful"],
  "ecommerce": [],
  "analytics": [],
  "hosting": ["Vercel"],
  "cdn": ["Cloudflare"],
  "frameworks": ["Next.js", "React"],
  "webServer": null
}

Every detection includes detectedVia (header, cookie, meta, script or html), so you can see why a technology was flagged.

Pricing (pay per event)

• $1.50 per 1,000 websites analysed ($0.0015 per site), plus Apify's tiny standard actor-start fee.
• Failed sites are free: unreachable domains, DNS errors, timeouts and bot-blocked pages (403/429) are returned with status and error but aren't charged.
• Example: enriching 10,000 leads costs $15.

How it works and its limits

The Actor downloads each homepage once and matches response headers, cookies, <meta> tags, script URLs and the page markup against its fingerprint set. Visible page text is ignored, so a site that merely mentions Shopify isn't flagged as Shopify.

Because there's no browser, tools injected later by a tag manager (for example a pixel loaded only through Google Tag Manager) may not show up. Sites with aggressive bot protection may return only CDN and server information. For most business websites, the CMS, e-commerce platform, hosting, CDN, frameworks and most marketing tools are detected from the first response.

FAQ

Is it a Wappalyzer clone? No. The fingerprints are an original rule set written for this Actor. It's built for the B2B use cases people buy BuiltWith and Wappalyzer for (lead lists, enrichment, competitive research), at a much lower price.

Can I check subpages? Yes. Pass a full URL, and that exact page is analysed.

Can I schedule it? Yes. Save a task, add a schedule, and connect Google Sheets, Slack, Zapier, Make or a webhook to track stack changes over time.