Website Tech Stack Detector: BuiltWith & Wappalyzer Alternative

Find out what technology any list of websites runs on: CMS and website builder (WordPress, Webflow, Wix, Squarespace, Drupal, HubSpot CMS…), e-commerce platform (Shopify, WooCommerce, Magento, BigCommerce, Salesforce Commerce Cloud…), analytics and tag managers, ad pixels (Meta, Google Ads, TikTok, LinkedIn…), marketing automation and email (HubSpot, Marketo, Klaviyo, Mailchimp…), live chat and support (Intercom, Drift, Zendesk…), payments (Stripe, PayPal, Klarna, Afterpay…), CDN and hosting (Cloudflare, Fastly, Vercel, WP Engine…) and JavaScript frameworks (Next.js, React, Vue, Angular…). That's 150+ technologies in 28 categories, each with the evidence that triggered it.

One request per website, no browser, no API key. Detection uses HTML, script URLs, <meta generator>, response headers and cookie names. Pay only for websites where something was detected.

Why use it

• 🎯 Lead filtering by tech stack: "only Shopify stores using Klaviyo", "WordPress sites without a chat widget", "HubSpot customers"
• 🧾 Grouped output: cms, ecommerce, analytics, advertising, marketing, chatAndSupport, payments, cdnAndHosting, frameworks columns plus the full technologies[] with category and evidence
• 🔍 Explainable: every detection says why (html: cdn.shopify.com, header server: cloudflare, cookie _shopify_y)
• 🧹 No false positives from text mentions: fingerprints use asset URLs, headers and markup, not product names in page copy
• 💸 Cheap: a single capped homepage download per site. Unreachable sites and sites filtered out by your tech filter are free.

Use cases

• Sales prospecting: agencies, SaaS and app developers targeting users of a platform (Shopify apps, WordPress plugins, HubSpot partners)
• Competitive intelligence: see which analytics, A/B testing and ad platforms competitors use
• Lead scoring & segmentation: enrich CRM accounts with CMS, e-commerce and marketing stack
• Market research: platform market share in a niche or region

How to use it

1. Click Try for free. A few websites are prefilled, so it works in one click.
2. Paste websites or domains, or pick an Input dataset (for example our Website Contact Extractor output) and set the Website field.
3. Optionally fill Only sites using (e.g. Shopify, Klaviyo) to turn it into a lead filter.
4. Click Start and export to CSV, Excel or JSON.

Input example

{
    "websites": ["allbirds.com", "gymshark.com", "mrrooter.com"],
    "onlyWithTechnologies": ["Shopify"],
    "includeFailedSites": false,
    "maxItems": 1000
}

Output example (real result)

{
    "website": "mailchimp.com",
    "domain": "mailchimp.com",
    "finalUrl": "https://mailchimp.com/",
    "title": "Email & SMS Marketing Platform | Mailchimp",
    "technologies": [
        { "name": "FullStory", "category": "Heatmaps & session recording", "evidence": "html: fullstory.com/s/fs.js" },
        { "name": "Akamai", "category": "CDN", "evidence": "header x-akamai-transformed: 9 - 0 pmb=mRUM,2" },
        { "name": "Envoy", "category": "Web server", "evidence": "header server: istio-envoy" },
        { "name": "OneTrust", "category": "Cookie consent", "evidence": "html: cdn.cookielaw.org" },
        { "name": "Optimizely", "category": "A/B testing", "evidence": "html: cdn.optimizely.com" }
    ],
    "technologyNames": ["FullStory", "Akamai", "Envoy", "OneTrust", "Optimizely"],
    "techCount": 5,
    "cms": [],
    "ecommerce": [],
    "analytics": ["FullStory"],
    "cdnAndHosting": ["Akamai"],
    "server": "istio-envoy"
}

The Tech stack view shows one row per domain with CMS, e-commerce, analytics, ad pixels, marketing, chat, payments, CDN/hosting, frameworks and the technology count.

Pricing

Pay-per-event: a fixed price per website where at least one technology was detected, currently about $1.20 per 1,000 websites (see the Pricing tab). Unreachable websites and websites excluded by Only sites using are free. There is no start fee and no compute charge on top.

FAQ

How accurate is it? Detection relies on publicly visible fingerprints (asset hosts, markup hooks, headers, cookies), the same signals BuiltWith and Wappalyzer use. Tools injected only by client-side JavaScript after page load, or behind logins, can't be seen without a browser.

Why are some sites "unreachable"? Large enterprise sites sometimes block automated requests (WAF/bot protection). They are not charged. Pass includeFailedSites: true to list them.

Can you add a technology? Yes. Open an issue on the Issues tab with the technology name and an example website.

Related actors by WAAGS

• Website Contact Extractor: emails, phones and socials from the same websites
• Domain WHOIS Lookup: domain age, registrar and expiry
• Bulk Email Validator · US Phone Number Validator