Tech Stack Detector & Emails (Wappalyzer and BuiltWith alternative)

Paste a list of websites and get back, for each one, the technologies it runs on and how to contact it, in one row per site:

• Tech stack. CMS, e-commerce platform, analytics, tag managers, payment processors, JavaScript frameworks, CDN, hosting and security, with versions where the site shows them. It uses more than 7,000 Wappalyzer-compatible fingerprints across 100+ categories.
• Contacts. Emails, phone numbers, and Instagram, Facebook, LinkedIn, X/Twitter, TikTok and YouTube profiles. They come from the homepage and from the site's contact, imprint or about page, which the actor finds and reads for you.

It works as a technology lookup the way Wappalyzer and BuiltWith do. It needs no browser, so it is fast, and at $5 per 1,000 websites it is a fraction of what other tech-lookup tools charge.

What people use it for

• Lead generation: take a list of domains and find every Shopify, WooCommerce or Magento store in it, together with a contact email.
• Sales targeting: find the sites that use a competitor's product (for example Klaviyo, HubSpot or Stripe) and reach out to them.
• Market research: see which technologies an industry or country uses.
• Enrichment: add technology and contact columns to a CRM or spreadsheet export.

How to find a website's tech stack and emails

1. Put domains or URLs in Websites, one per line (acme.com, https://shop.acme.com/).
2. Leave Include contacts on for emails, phones and socials; turn it off for the tech stack only.
3. Run it, then download the results as JSON, CSV or Excel, or read them through the API.

Around 10 sites are scanned in parallel by default. Raise Sites in parallel for lists of tens of thousands.

Output

One item per website:

{
  "domain": "allbirds.com",
  "finalUrl": "https://www.allbirds.com/",
  "statusCode": 200,
  "title": "Allbirds: Comfortable, Sustainable Shoes & Apparel",
  "language": "en-US",
  "technologyNames": ["Apple Pay", "Cloudflare", "Google Tag Manager", "PayPal", "Shopify", "Swiper"],
  "technologiesByCategory": {
    "Ecommerce": ["Shopify"],
    "Payment processors": ["Apple Pay", "PayPal"],
    "CDN": ["Cloudflare"],
    "Tag managers": ["Google Tag Manager"]
  },
  "technologies": [
    {"name": "Shopify", "version": null, "confidence": 100, "categories": ["Ecommerce"], "website": "https://shopify.com"}
  ],
  "emails": ["help@allbirds.com"],
  "phones": [],
  "socials": {"instagram": ["https://instagram.com/allbirds"], "tiktok": ["https://tiktok.com/@weareallbirds"]},
  "contactPage": null
}

A site that cannot be reached comes back with an error field and costs nothing.

Use it as an API

One call runs it and returns the results as JSON (for runs under 5 minutes; longer ones start a run and read its dataset). Apify's Python and JavaScript clients, and its Make, Zapier and n8n integrations, work the same way.

curl -X POST "https://api.apify.com/v2/acts/pikoulas~website-tech-stack-contacts/run-sync-get-dataset-items?token=YOUR_APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"urls": ["apify.com", "allbirds.com", "wordpress.org/news/"]}'

AI agents can call it as a tool through Apify's MCP server: https://mcp.apify.com?tools=pikoulas/website-tech-stack-contacts.

How much does it cost to look up a website's tech stack?

You pay $0.005 per website analyzed, which is $5 per 1,000. Unreachable sites are free. Runs that go through Apify's residential proxy also pay its traffic, $0.0012 per 100 KB. There are no monthly fees and no minimums.

Good to know

• Detection reads the HTML, headers, cookies, scripts and meta tags that the site serves. A few technologies can only be seen by running the page's JavaScript in a browser, and those are not detected.
• Emails come only from what the site publishes. Obvious placeholders such as you@example.com are dropped.
• Most sites need no proxy. If a site blocks the actor, turn on Apify Proxy in the input.
• Only public pages are read. Using the contact data is subject to the laws where you operate (GDPR, CAN-SPAM and similar).

FAQ

Is it legal to scan websites for their tech stack and emails?

It reads only what the websites show publicly, without logging in. Scraping public data is generally legal, but personal data is protected by laws such as the GDPR and the CCPA, and each website's terms may limit how you use what you collect. Email addresses found on a site are still personal data; laws such as the GDPR, the CCPA and the CAN-SPAM Act limit what you may do with them, cold outreach included. If you're unsure, ask a lawyer; Apify's Is web scraping legal? is a good start.

Something missing or not working?

Open an issue on the Issues tab with the input you used, or ask there for a field you need.