# Website Tech Stack Detector (BuiltWith Alternative) (`impressionable_lupine/website-tech-stack-detector`) Actor Detect the tech stack of any website: CMS, ecommerce, analytics, tag managers, CRM, chat, payments, CDN, frameworks, A/B testing, plus MX and SPF email services. Evidence and confidence per technology. $0.002/domain. - **URL**: https://apify.com/impressionable_lupine/website-tech-stack-detector.md - **Developed by:** [Majd Hijazin](https://apify.com/impressionable_lupine) (community) - **Categories:** Lead generation, Developer tools - **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks - **User rating**: No ratings yet ## Pricing from $2.00 / 1,000 domain analyseds This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events. 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 ## Website Tech Stack Detector: a Wappalyzer & BuiltWith alternative **Find out what technology any website uses.** Give it a list of domains. For each one you get the **CMS, ecommerce platform, analytics, tag managers, CRM and marketing automation, live chat, payments, CDN and hosting, JavaScript frameworks and A/B testing tools** it runs. You also get its **email provider (MX)**, the **sending services in its SPF record** and its **SaaS domain verifications**. Every detection comes with a **confidence score and the evidence** behind it: the header, script URL, meta tag, cookie or DNS record we saw. - **508 technologies** in our own fingerprint set, built from public signals - **$0.002 per domain**. Unreachable domains are free. - **Fast:** 20 real sites in about 5 seconds (homepage only) or about 11 seconds (deep crawl) - **Polite:** one clear User-Agent, robots.txt respected, no proxies, no headless browser - Structured JSON that works well for **lead enrichment, technographics, competitor research and AI agents** ### What you can use it for - **Sales prospecting & lead scoring:** find Shopify stores using Klaviyo, or SaaS companies on HubSpot that run Intercom - **Technographic enrichment:** add `cms`, `ecommerce`, `crmMarketing` and `emailProvider` columns to a CRM or a Clay/Sheets list - **Competitive intelligence:** see which analytics, A/B testing and chat vendors competitors use, and track changes over time - **Agency audits & migrations:** check WordPress or Drupal version, page builder, CDN, consent banner and tracking pixels - **Security & compliance checks:** HSTS and CSP headers, bot protection, consent management platform, risky third-party scripts (for example polyfill.io) ### Input and examples | Field | Type | Default | Description | |---|---|---|---| | `domains` | array of strings | required | Domains (`stripe.com`) or URLs (`https://shop.example.com/pricing`). Duplicates and `www.` are merged. Up to 10,000 per run. | | `deepCrawl` | boolean | `false` | Also analyse up to N internal pages (pricing, cart, contact, login, blog …). This catches tools that only load off the homepage, such as checkout payments or chat widgets. | | `deepCrawlPages` | integer 1–10 | `4` | Internal pages per domain when `deepCrawl` is on. | | `includeDns` | boolean | `true` | MX, SPF, TXT verification, NS and `www` CNAME lookups. | | `includeEvidence` | boolean | `true` | Attach the observed signal to each technology. | | `minConfidence` | integer 0–100 | `0` | Drop weak detections. A value of 50 removes technologies that are only *implied* by another one, such as PHP implied by WordPress. | | `maxConcurrency` | integer 1–50 | `10` | Domains analysed in parallel. Pages within one domain are always fetched one at a time. | | `requestTimeoutSecs` | integer 5–60 | `15` | Timeout per HTTP request. | ```json { "domains": ["allbirds.com", "stripe.com", "wordpress.org", "hubspot.com"], "deepCrawl": true, "deepCrawlPages": 3 } ``` ### Output: one item per domain ```json { "domain": "allbirds.com", "url": "https://www.allbirds.com/", "status": "ok", "httpStatus": 200, "title": "Allbirds: Comfortable, Sustainable Shoes & Apparel", "technologyCount": 13, "technologyNames": ["Shopify", "Microsoft Clarity", "Google Tag Manager", "Attentive", "Cloudflare", "Swiper", "Microsoft 365", "…"], "technologies": [ { "name": "Shopify", "slug": "shopify", "category": "Ecommerce", "group": "ecommerce", "version": null, "confidence": 100, "website": "https://www.shopify.com", "evidence": [ { "type": "header", "key": "powered-by", "value": "Shopify", "page": "https://www.allbirds.com/" }, { "type": "cookie", "key": "_shopify_essential", "value": "Set-Cookie", "page": "https://www.allbirds.com/" }, { "type": "script", "key": "src", "value": "https://cdn.shopify.com/shopifycloud/…", "page": "https://www.allbirds.com/" } ] } ], "categories": { "cms": [], "ecommerce": ["Shopify"], "analytics": ["Microsoft Clarity"], "tagManagers": ["Google Tag Manager"], "crmMarketing": ["Attentive"], "chat": [], "payments": [], "cdnHosting": ["Cloudflare"], "frameworks": ["Swiper"], "abTesting": [], "advertising": [], "email": ["Microsoft 365", "…"], "other": ["HSTS", "…"] }, "dns": { "mxRecords": ["allbirds-com.mail.protection.outlook.com"], "mxProviders": ["Microsoft 365"], "spfRecord": "v=spf1 include:allbirds_com._es.easydmarc.com include:spf.protection.outlook.com ~all", "spfIncludes": ["allbirds_com._es.easydmarc.com", "spf.protection.outlook.com"], "spfServices": ["EasyDMARC", "Microsoft 365"], "txtVerifications": ["Google Search Console", "Microsoft 365", "DocuSign", "Apple Business", "Miro"], "nameservers": ["ns2.markmonitor.com", "…"], "dnsProviders": ["MarkMonitor DNS"], "wwwCname": "shops.myshopify.com", "hostingFromCname": ["Shopify"] }, "emailProvider": "Microsoft 365", "deepCrawl": true, "pagesAnalyzed": ["https://www.allbirds.com/", "https://www.allbirds.com/collections/new-arrivals-26", "https://www.allbirds.com/products/…"], "billableEvents": ["domain-analyzed", "deep-crawl"], "fetchedAt": "2026-10-20T18:27:18.512Z", "durationMs": 6697 } ``` **`status` values:** `ok` (charged), `blocked` (bot challenge or 401/403/429/503; header-level detections are still returned), `http_error`, `unreachable`, `robots_disallowed`, `invalid_input`, `skipped_budget`. **Only `ok` is charged.** **Category groups:** `cms`, `ecommerce`, `analytics`, `tagManagers` (including CDPs such as Segment), `crmMarketing` (CRM, marketing automation, email marketing, forms, scheduling, B2B intent), `chat` (live chat, helpdesk, AI chatbots), `payments` (including buy now pay later), `cdnHosting` (CDN, PaaS, web servers), `frameworks` (JS frameworks, backend frameworks, languages, UI libraries), `abTesting` (experimentation, personalization, feature flags), `advertising` (pixels and ad tech), `email` (MX hosting, email security, SPF senders, DNS providers, verifications) and `other` (consent, security, CAPTCHA, video, maps, search, SEO, accessibility …). The **Overview** dataset view gives one row per domain, with a technology list and email provider, ready to export to CSV or Excel. ### Pricing (pay per event) | Event | Price | When | |---|---|---| | `domain-analyzed` | **$0.002** | One reachable domain analysed (homepage plus DNS). | | `deep-crawl` | **$0.005** | Added once per domain when `deepCrawl` is on **and** at least one internal page was analysed. | - 1,000 domains cost **$2**. With deep crawl they cost **$7**. - **Not charged:** unreachable, blocked, robots-disallowed, invalid or duplicate inputs, and any domain where deep crawl found no extra page. - **Your budget is respected.** Set *Maximum cost per run* (`maxTotalChargeUsd`). The Actor reserves the worst-case cost of each domain before it starts work, so parallel workers can never overshoot. Domains that no longer fit are returned as `skipped_budget` and are free. If the budget is below $0.002, the run stops at once with `BUDGET_TOO_LOW`. - No proxies and no browser keep platform usage small. Compared with the alternatives: the official BuiltWith API needs a subscription, and the Wappalyzer-style Actors in the Store charge **$0.01–$0.10 per domain**. ### Use it from the API, Python, n8n/Make or an AI agent (MCP) **REST (synchronous, returns the dataset):** ```bash curl -X POST "https://api.apify.com/v2/acts/impressionable_lupine~website-tech-stack-detector/run-sync-get-dataset-items?token=$APIFY_TOKEN" \ -H 'Content-Type: application/json' \ -d '{"domains":["stripe.com","allbirds.com"],"deepCrawl":false}' ``` **JavaScript:** ```js import { ApifyClient } from 'apify-client'; const client = new ApifyClient({ token: process.env.APIFY_TOKEN }); const run = await client.actor('impressionable_lupine/website-tech-stack-detector').call({ domains: ['stripe.com'] }); const { items } = await client.dataset(run.defaultDatasetId).listItems(); console.log(items[0].categories); ``` **MCP (Claude, Cursor, any MCP client):** add the [Apify MCP server](https://docs.apify.com/integrations/mcp) and enable this Actor: ```json { "mcpServers": { "apify": { "url": "https://mcp.apify.com/?actors=impressionable_lupine/website-tech-stack-detector", "headers": { "Authorization": "Bearer " } } } } ``` Then ask: *"What CMS, analytics and chat tools do allbirds.com and gymshark.com use? Who hosts their email?"* The agent calls the Actor with `{"domains":["allbirds.com","gymshark.com"]}` and reads the `categories` and `dns` fields. ### How detection works 1. We fetch the homepage over HTTPS (falling back to HTTP, then `www.`) with the User-Agent `WebsiteTechStackDetector/1.0`, after checking robots.txt. 2. We read **response headers, Set-Cookie names, `` tags, `