# Tech Stack Detector - Wappalyzer & BuiltWith Alternative (`clearfetch/tech-stack-detector`) Actor Detect the technologies behind any website: CMS, ecommerce platform, JavaScript frameworks, analytics, ad tech, CDN, hosting, email provider. 7,600+ fingerprints, versions and confidence scores. Clean JSON per website. - **URL**: https://apify.com/clearfetch/tech-stack-detector.md - **Developed by:** [Nada Hanad](https://apify.com/clearfetch) (community) - **Categories:** Developer tools, Lead generation, SEO tools - **Stats:** 4 total users, 2 monthly users, 100.0% runs succeeded, 0 bookmarks - **User rating**: No ratings yet ## Pricing from $35.00 / 1,000 website analyzeds This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events. Since this Actor supports Apify Store discounts, the price gets lower the higher subscription plan you have. Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event ## What's an Apify Actor? An Actor is a serverless cloud program that runs on the Apify platform. It has two run modes. In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours, and optionally produces a well-defined JSON output, datasets with results, or files in key-value store. In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server. Apify vocabulary and the platform model are defined once, in the agent quickstart at https://apify.com/agents.md. ## How to integrate an Actor? If asked about integration, you help developers integrate Actors into their projects. You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready. Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run. For examples already wired to this Actor's own input schema, see the [API](#api) section below. Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`). # README ## Tech Stack Detector - Wappalyzer & BuiltWith Alternative Find out what any website is built with. Give this Actor a list of domains and it returns the technologies behind each one: CMS, ecommerce platform, JavaScript frameworks, analytics and ad tags, CDN, hosting, payment processors, marketing automation, plus the email provider and domain-verification services visible in DNS. It is a drop-in alternative to the Wappalyzer and BuiltWith APIs at a fraction of the price: **$0.05 per website** ($0.02 until 16 October 2026), failed websites are free. ### What data you get - **Technologies** with name, category, confidence score (0-100), detected version where possible, vendor website and the exact evidence (header, script, cookie, meta tag, DNS record) that triggered the detection. - **7,600+ fingerprints in 109 categories**, refreshed monthly from the open-source webappanalyzer database. - **DNS-level insights**: email provider (Google Workspace, Microsoft 365, Proton...), DNS host, CDN, and SaaS tools the company verified on its domain (reported separately in `dnsTechnologies`). - **Server facts**: HTTP status, final URL after redirects, `Server` and `X-Powered-By` headers, generator meta tag, page title. - Clean JSON per website, also exportable as CSV or Excel from the Apify dataset. ### How to use 1. Paste domains or URLs into **Websites** (one per line; bare domains are fine). 2. Click **Start**. 1,000 websites take about 2-4 minutes at the default concurrency. 3. Download the results or read them through the API. Each website is one dataset item. ### Input | Field | Type | Default | Description | |-------|------|---------|-------------| | `urls` | array | — | Domains or URLs to analyze. Also accepts `url` (single string, comma or newline separated) and `startUrls` for compatibility with other Actors and integrations. | | `urlListUrl` | string | — | A link to a text or CSV file with one domain or URL per line, for lists too long to paste (a Google Sheets "Publish to the web" CSV link works). Read in addition to `urls`. | | `includeDns` | boolean | true | Look up TXT, MX, NS and CNAME records to detect mail providers, DNS hosts and domain-verified services. | | `includeEvidence` | boolean | true | Attach the matched header/script/cookie/DNS snippet to every detection. | | `minConfidence` | integer | 0 | Drop detections below this confidence (0-100). | | `maxConcurrency` | integer | by memory | Websites analyzed in parallel (1-50). Left empty, it follows the run's memory: 40 at the default 4 GB, 20 at 2 GB. | | `timeoutSecs` | integer | 20 | Per-website HTTP timeout (5-60). | | `proxyConfiguration` | object | off | Optional Apify Proxy or custom proxies for sites that block datacenter traffic. Not needed for most sites. | ### Output example One item per website (trimmed to three technologies here): ```json { "url": "https://www.shopify.com/", "finalUrl": "https://www.shopify.com/fr", "ok": true, "pageAnalyzed": true, "statusCode": 200, "title": "Shopify France", "technologies": [ { "name": "Cart Functionality", "slug": "cart-functionality", "confidence": 100, "version": null, "categories": [ { "id": 6, "name": "Ecommerce" } ], "website": "https://www.wappalyzer.com/technologies/ecommerce/cart-functionality", "evidence": [ { "type": "dom", "key": "a[href*='/order']", "pattern": "", "match": "a[href*='/order']" }, { "type": "dom", "key": "a[href*='/checkout']", "pattern": "", "match": "a[href*='/checkout']" } ] }, { "name": "Cloudflare", "slug": "cloudflare", "confidence": 100, "version": null, "categories": [ { "id": 31, "name": "CDN" } ], "website": "https://www.cloudflare.com", "evidence": [ { "type": "headers", "key": "server", "pattern": "^cloudflare$", "match": "cloudflare" }, { "type": "headers", "key": "cf-cache-status", "pattern": "", "match": "BYPASS" } ] }, { "name": "DHL", "slug": "dhl", "confidence": 100, "version": null, "categories": [ { "id": 99, "name": "Shipping carriers" } ], "website": "https://www.dhl.com", "evidence": [ { "type": "text", "pattern": "\\bDHL\\b", "match": "window.__brochureDuxConfig={\"eventHandlerEndpoint\":\"/.well-known/dux?v2&_pri=1\"}Passer au contenu.supports-\\[container-type\\:scroll-state\\]\\:after\\:\\[\\@containe" } ] } ], "techNames": [ "Cart Functionality", "Cloudflare", "DHL", "HSTS", "HTTP/3", "Open Graph", "Priority Hints", "Shopify", "Tailwind CSS", "Trident AB", "Google Tag Manager", "YouTube" ], "count": 12, "categorized": { "Ecommerce": [ "Cart Functionality", "Shopify" ], "CDN": [ "Cloudflare" ], "Shipping carriers": [ "DHL" ], "Security": [ "HSTS" ], "Miscellaneous": [ "HTTP/3", "Open Graph" ], "Performance": [ "Priority Hints" ], "UI frameworks": [ "Tailwind CSS" ], "A/B Testing": [ "Trident AB" ], "Tag managers": [ "Google Tag Manager" ], "Video players": [ "YouTube" ] }, "dnsTechNames": [ "Adobe", "Amazon SES", "Amazon Web Services", "Apple iCloud Mail", "Atlassian Cloud", "Autodesk" ], "server": { "server": "cloudflare", "poweredBy": null, "generator": null }, "dns": { "MX": [ "aspmx.l.google.com", "alt3.aspmx.l.google.com" ], "NS": [ "gold.foundationdns.net", "gold.foundationdns.org" ] }, "scanTimeMs": 1298, "scannedAt": "2026-09-05T12:55:53.025Z" } ``` Websites that cannot be reached produce an error item and are not charged: ```json { "url": "https://this-domain-does-not-exist-12345.com/", "ok": false, "statusCode": null, "error": "getaddrinfo ENOTFOUND this-domain-does-not-exist-12345.com", "errorCode": "ENOTFOUND", "scanTimeMs": 1065, "scannedAt": "2026-09-05T12:49:13.516Z" } ``` ### Pricing - **$0.05 per website analyzed** from 17 October 2026, $0.02 until then. 100 websites = $5, 1,000 websites = $50. Unreachable websites are free. - No subscription, no API key, no minimum. Runs on the Apify free plan. - For comparison: BuiltWith's API plans cost hundreds of dollars per month, and the next Wappalyzer-style Actor on Apify Store charges $0.10 per site. Paid Apify plans pay less: 10% off on Bronze, 20% on Silver and 30% on Gold and higher tiers. Apify also charges a run-start fee of $0.00005 per started GB of allocated memory (minimum one event), including runs that produce no chargeable results. ### Use cases - **Lead generation**: find every Shopify, WooCommerce or Magento store in a list of domains, or every company on HubSpot, Salesforce or Intercom. - **Sales prospecting**: qualify accounts by tech stack before outreach (framework, CRM, analytics, payment provider). - **Competitive analysis**: track which tools competitors adopt or drop over time by scheduling a weekly run. - **Agency audits**: inventory a client's marketing tags, CDN and hosting in one pass. - **Security and migration planning**: know which CMS versions, JavaScript libraries and hosting providers are in use across a portfolio of sites. - **AI agents and workflows**: call it from n8n, Make, Zapier, LangChain or any MCP client to enrich domains on the fly. ### Integrations Run it from the API with any language: ```bash curl -X POST "https://api.apify.com/v2/acts/clearfetch~tech-stack-detector/run-sync-get-dataset-items?token=YOUR_TOKEN" \ -H "Content-Type: application/json" \ -d '{"urls": ["stripe.com", "shopify.com"]}' ``` Python: ```python from apify_client import ApifyClient client = ApifyClient("YOUR_TOKEN") run = client.actor("clearfetch/tech-stack-detector").call(run_input={"urls": ["stripe.com"]}) for item in client.dataset(run["defaultDatasetId"]).iterate_items(): print(item["url"], item["techNames"]) ``` Works with the Apify integrations for n8n, Make, Zapier, Google Sheets, webhooks, and with AI agents through the Apify MCP server. ### FAQ **Do I need proxies?** No. The Actor fetches one page per website with a normal browser-like request. A few sites block datacenter traffic; for those, enable Apify Proxy in the input. **How accurate is it?** Detection uses the same fingerprint approach as Wappalyzer: HTTP headers, cookies, HTML, meta tags, script URLs, inline scripts, DOM selectors and DNS. Every detection carries a confidence score and the evidence it was based on, so you can filter or verify. **What does a confidence below 100 mean?** Some technologies are only visible indirectly, for example a vendor URL that appears in an inline script, a preload hint or an image reference rather than in a `