Website Built With Checker - Find Any Site's CMS & Tech Stack

What does Website Built With Checker do?

Website Built With Checker shows what any website is built with. It is a Wappalyzer alternative and BuiltWith alternative that finds the tech stack of any website in bulk for about $10 per 1,000 sites. Give it a list of domains and it returns the CMS, ecommerce platform, analytics and marketing tools, JavaScript frameworks, CDN, hosting, payment providers, email provider and SaaS vendors each site uses, with versions and categories.

It checks every site against 7,600+ technology fingerprints (the open Wappalyzer-format database) plus DNS records, so it also detects tools that never show up in a page's HTML: Google Workspace or Microsoft 365, SendGrid, Salesforce, HubSpot, DocuSign, OpenAI, Atlassian and hundreds more.

It works as a fast, low-cost alternative to the Wappalyzer API: plain HTTP requests, no browser.

Not affiliated with, endorsed or sponsored by Wappalyzer or BuiltWith.

Why use a website technology lookup?

• 🎯 Lead generation and sales prospecting: find every Shopify store, WordPress site, HubSpot user or Stripe merchant in a list and target them.
• 🧭 Competitor research: see which analytics, A/B testing, chat and payment tools competitors run.
• 📈 Market sizing: measure the market share of a technology across thousands of domains.
• 🧹 CRM enrichment: add tech stack, email provider and social links to company records.
• 🔐 Security and IT audits: inventory server software, CDNs and versions across your domains.

Runs on the Apify platform, so you get an API, scheduling, webhooks and integrations with Make, Zapier, n8n, Google Sheets and Clay.

What data does it extract?

Field	Example
domain	allbirds.com
technologyNames	Shopify, Cloudflare, Google Tag Manager, PayPal, Apple Pay
ecommercePlatform, cms	Shopify, WordPress (null when none): a direct answer for AI agents and filters
technologies[]	name, version, confidence, categories, website, SaaS, open source, pricing
categories	{ "Ecommerce": ["Shopify"], "CDN": ["Cloudflare"] }
title, description, language	page title, meta description, en
socialLinks	company Facebook, LinkedIn, X, Instagram, YouTube, TikTok, GitHub links
statusCode, finalUrl	HTTP status and URL after redirects

How to find out what technology a website uses

1. Click Try for free.
2. Paste domains or URLs into Domains or URLs (one per line, thousands at once is fine).
3. Click Start.
4. Download results as CSV, Excel, JSON or HTML, or fetch them through the API.

How much does it cost?

You pay per website successfully analyzed: $0.01 ($10 per 1,000 sites). Sites that fail to load (dead domains, timeouts) are not charged. Apify's free plan includes monthly credit, so you can test on hundreds of sites at no cost.

Input

See the Input tab for all options. Example:

{
    "domains": ["shopify.com", "https://www.allbirds.com", "wordpress.org"],
    "checkDns": true,
    "maxConcurrency": 20
}

Output example

{
    "domain": "allbirds.com",
    "redirectedTo": null,
    "statusCode": 200,
    "title": "Allbirds: Sustainable Shoes & Clothing",
    "technologyCount": 8,
    "technologyNames": "Apple Pay, Cloudflare, Google Tag Manager, HTTP/3, Microsoft 365, PayPal, Shopify, Swiper",
    "ecommercePlatform": "Shopify",
    "cms": null,
    "technologies": [
        { "name": "Shopify", "version": null, "confidence": 100, "categories": ["Ecommerce"], "website": "https://shopify.com", "saas": true, "openSource": false, "pricing": ["mid", "recurring"] }
    ],
    "categories": { "Ecommerce": ["Shopify"], "CDN": ["Cloudflare"], "Payment processors": ["PayPal", "Apple Pay"] },
    "socialLinks": ["https://www.instagram.com/allbirds/"]
}

You can download the dataset in various formats such as JSON, HTML, CSV, or Excel.

Tips

• Turn off "Detect email & DNS providers" if you only need front-end technologies; it is slightly faster.
• Pass the homepage for the most complete result; inner pages often load fewer scripts.
• If a large share of sites block requests, enable Apify Proxy in the input.

Use it with AI agents (MCP)

Give Claude, ChatGPT, Cursor or any MCP client this Actor as a tool through Apify's MCP server: add https://mcp.apify.com?tools=tenfoldfleet/tech-stack-detector as a remote MCP server and sign in with your Apify account. The agent fills in the input, runs the Actor and reads the results itself; you pay the same per-event price as a normal run.

FAQ

Is this a free Wappalyzer API alternative?

It uses the same open fingerprint format as Wappalyzer and adds DNS-based detection. You only pay a small amount per site analyzed, with no subscription.

How accurate is it?

Each technology comes with a confidence score. Detection uses HTTP headers, cookies, HTML, scripts, meta tags, DOM selectors and DNS records. Technologies that only reveal themselves through JavaScript executed in a browser may be missed.

Can I use it from code or AI agents?

Yes. Call it through the Apify API, the JavaScript or Python client, or the Apify MCP server.

Credits

Technology fingerprints come from the open-source webappanalyzer project (GPL-3.0).

Support

Found a site that's detected wrong? Open an issue in the Issues tab and it will be fixed quickly.

This Actor only reads publicly available website data and DNS records. It does not log in or collect personal data.

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