Website Tech Stack Detector – BuiltWith & Wappalyzer alternative

Find out which technologies any website uses: CMS, ecommerce platform, analytics and tag managers, JavaScript frameworks, CDN and hosting, marketing automation, live chat, payment providers, cookie banners and more. Paste a list of domains and get one clean record per website. Optionally add the email provider (Google Workspace, Microsoft 365…) and SaaS tools verified in DNS, plus social profile links found on the homepage.

• 7,600+ technology fingerprints (open-source webappanalyzer database, the community successor of Wappalyzer's fingerprints)
• No browser, no API key, no account anywhere: fast, cheap and light (256 MB is enough)
• Lead-gen filter: only return websites that use e.g. Shopify, WordPress, HubSpot or a whole category like Ecommerce – and only pay for those
• $0.0019 per website analyzed – unreachable, blocked and filtered-out websites are free

What you get per website

Field	Example
domain, finalUrl, statusCode	colourpop.com, https://colourpop.com/, 200
title, description, language	homepage title, meta description and lang
technologyNames	["Shopify", "Klaviyo", "Google Tag Manager", "Cloudflare", …]
technologies	per technology: name, version, confidence, categories, website, saas, openSource (+ evidence if enabled)
technologiesByCategory	{"Ecommerce": ["Shopify"], "Analytics": ["Google Analytics"], …}
dns	emailProvider, emailSendingServices, verifiedServices, dnsHosting, nameservers
socialLinks, emails	{"instagram": [...], "linkedin": [...]}, ["hello@example.com"]

A run summary with the most common technologies across your list is saved to the key-value store as SUMMARY.

Input

Field	Default	Description
urls	–	Domains or homepage URLs (example.com, https://www.example.com/sv/)
technologyFilter	empty	Only return websites using any of these technology or category names (e.g. Shopify, WordPress, Ecommerce, Live chat). Non-matches are free.
checkDns	true	Email provider, email-sending services, verified SaaS and DNS hosting from MX/TXT/NS records
extractSocialLinks	true	Social profile links and mailto: emails on the homepage
includeEvidence	false	Which signal matched each technology (header, cookie, meta, script URL, HTML, DNS)
maxConcurrency	10	Websites analyzed in parallel (1–30)

Example: find Shopify stores in a list

{
  "urls": ["www.allbirds.com", "colourpop.com", "www.glossier.com", "www.nike.com"],
  "technologyFilter": ["Shopify"],
  "checkDns": false,
  "extractSocialLinks": true,
  "includeEvidence": false
}

Pricing

Pay per event: $0.0019 per website analyzed (domain-analyzed). That is $1.90 per 1,000 websites. Websites that cannot be reached, that block automated requests, invalid inputs and websites removed by technologyFilter are free. The Actor stops cleanly when your maximum charge per run is reached.

How it works and limits

The Actor downloads each homepage once (honest bot user agent, no browser), and matches HTTP headers, cookies, meta tags, script URLs, inline scripts, HTML and DOM patterns against the fingerprint database, then applies "implies" rules (e.g. WordPress → PHP, MySQL). Optional DNS checks use public DNS-over-HTTPS (Cloudflare, Google).

• Technologies that only reveal themselves after JavaScript runs in a real browser may be missed. Globals set in inline scripts (e.g. __NEXT_DATA__) are detected.
• Only the homepage (or the URL you give) is analyzed, not the whole site.
• Some sites behind aggressive bot protection return 403/429; those are returned as free error records with whatever header/DNS signals were visible.
• "Verified services" come from public DNS TXT verification records: they show that the organization has an account with that vendor, not that the tool runs on the website.

Use cases

• Lead generation: build lists of Shopify, WooCommerce, Magento or HubSpot users from a domain list
• Sales intelligence & enrichment: add tech stack, email provider and social links to CRM accounts
• Competitor research: see which analytics, A/B testing and marketing tools competitors run
• Agencies & security teams: audit CMS versions and third-party scripts across a portfolio

Data source and license

Technology fingerprints come from the open-source webappanalyzer project, licensed under GPL-3.0 (bundled unmodified in src/data, license in src/data/LICENSE-webappanalyzer). This Actor is not affiliated with BuiltWith or Wappalyzer.

Only publicly available information (what every visitor's browser receives, and public DNS) is collected. You are responsible for using the results in line with applicable laws such as the GDPR, especially for any personal data like named email addresses.