# Website Tech Stack Detector – BuiltWith/Wappalyzer Alternative (`pulsedata/website-tech-stack-detector`) Actor

Find out what any website is built with: CMS, e-commerce, frameworks, analytics, ads, tag managers, payments, CDN, hosting, email provider & 7,500+ technologies with versions and confidence. Bulk-analyze thousands of domains. BuiltWith / Wappalyzer alternative.

- **URL**: https://apify.com/pulsedata/website-tech-stack-detector.md
- **Developed by:** [PulseData](https://apify.com/pulsedata) (community)
- **Categories:** Lead generation, SEO tools, Developer tools
- **Stats:** 3 total users, 2 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

$2.00 / 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.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
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.
Actors are written with capital "A".

## 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.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## Website Technology Stack Detector – BuiltWith / Wappalyzer alternative

Find out **what any website is built with**. Paste a list of domains and get the CMS, e-commerce platform, JavaScript frameworks, analytics and advertising tags, tag managers, payment processors, CDN, hosting, web server, programming language, email provider, security and compliance tools – matched against **7,500+ technology fingerprints** with versions and confidence scores.

Built for bulk: analyze thousands of domains in one run for **$2 per 1,000 websites**. No browser needed – fast HTTP + DNS analysis.

### What you get per website

```json
{
  "url": "allbirds.com",
  "finalUrl": "https://www.allbirds.com/",
  "title": "Allbirds: Comfortable, Sustainable Shoes & Apparel",
  "technologyCount": 12,
  "technologyNames": ["Shopify", "Cloudflare", "Google Tag Manager", "Apple Pay", "PayPal", "Swiper", "web-vitals", "HTTP/3", "HSTS", "Open Graph", "Priority Hints", "Microsoft 365"],
  "technologies": [
    { "name": "Shopify", "categories": ["Ecommerce"], "version": null, "confidence": 100, "website": "https://shopify.com", "icon": "…/Shopify.svg", "saas": true, "evidence": ["scriptSrc", "meta"] },
    { "name": "Cloudflare", "categories": ["CDN"], "confidence": 100, "evidence": ["headers"] }
  ],
  "summary": {
    "cms": null, "ecommerce": "Shopify", "framework": null, "programmingLanguage": null,
    "webServer": null, "cdn": "Cloudflare", "hosting": null,
    "analytics": [], "advertising": [], "tagManager": "Google Tag Manager",
    "payments": ["Apple Pay", "PayPal"], "emailProvider": "Microsoft 365",
    "security": ["HSTS"], "cookieCompliance": null, "liveChat": null, "crm": null
  },
  "saasServicesFromDns": ["DocuSign", "Miro", "Cursor", "Apple iCloud Mail"],
  "categories": { "Ecommerce": ["Shopify"], "CDN": ["Cloudflare"], "Payment processors": ["Apple Pay", "PayPal"] },
  "dns": { "mx": ["allbirds-com.mail.protection.outlook.com"], "ns": ["…"], "txt": ["v=spf1 …"] },
  "headers": { "server": "cloudflare", "x-powered-by": null }
}
```

- `technologies` – every detected technology with categories, version (when exposed), confidence (0-100), vendor website, icon URL, SaaS/open-source flags, pricing hints and the *evidence* that triggered the match (headers, cookies, meta, HTML, script URLs, script code, DOM, DNS).
- `summary` – the most useful facts pre-selected: CMS, e-commerce platform, framework, language, server, CDN, hosting, analytics, ads, tag manager, payments, email provider, CRM, live chat, cookie banner, A/B testing.
- `saasServicesFromDns` – SaaS tools the company verified on its domain (DNS TXT records): Google Workspace, Microsoft 365, HubSpot, Atlassian, Notion, Zoom, DocuSign, Canva … great for sales intelligence.
- `categories` – technologies grouped by category name.

### Use cases

- **Lead generation & sales intelligence** – find companies using Shopify, WooCommerce, HubSpot, Salesforce, Klaviyo, Intercom, …; build lists by technology.
- **Competitive & market research** – technology market share across your industry.
- **Agency prospecting** – spot outdated CMS versions, missing analytics, no cookie banner, no CDN.
- **Website audits / due diligence** – inventory of third-party scripts, trackers and vendors.
- **Enrichment** – enrich CRM or scraped domain lists with tech stack data.

### Input

| Field | Description |
|---|---|
| `urls` | Domains or URLs, one per line. |
| `maxExternalScripts` | How many external JavaScript files to download per site for deeper detection (default 10). |
| `fetchDns` | Resolve MX/NS/TXT/CNAME to detect email/DNS providers and verified SaaS services (default on). |
| `minConfidence` | Minimum confidence to report (default 50). |
| `includeDescriptions` | Add a description for each technology. |
| `concurrency` | Parallel websites (default 10). |
| `proxyConfiguration` | Optional proxies (use if target sites block datacenter IPs). |

### How it works & limitations

The detector downloads the HTML, HTTP headers, cookies and a sample of JavaScript files of each site and resolves its DNS records, then matches them against the open-source fingerprint database maintained by the community ([webappanalyzer](https://github.com/enthec/webappanalyzer), the continuation of the Wappalyzer rules). Technologies that only reveal themselves through JavaScript runtime globals are detected heuristically from script code with reduced confidence. Single-page apps that render everything client-side may show fewer technologies than a browser-based analysis.

### Pricing

**$0.002 per website analyzed** ($2 per 1,000). Failed/unreachable sites are not charged.

### Integrations

Run on a schedule, via API or SDK, export to JSON/CSV/Excel, or pipe into Google Sheets, Airtable, HubSpot, Make, Zapier or n8n. Available as an MCP tool for AI agents.

### License

This actor's source is licensed under GPL-3.0; it includes the webappanalyzer fingerprint database (GPL-3.0).

# Actor input Schema

## `urls` (type: `array`):

Domains or URLs to analyze, one per line (e.g. `shopify.com`, `https://www.nytimes.com`). Thousands are fine.

## `maxExternalScripts` (type: `integer`):

Downloads up to N external JavaScript files per site to detect libraries referenced in code (improves accuracy). 0 disables.

## `fetchDns` (type: `boolean`):

Resolve MX/NS/TXT/CNAME records to detect email providers, DNS hosts and verified services (Google Workspace, Microsoft 365, Cloudflare, HubSpot …).

## `minConfidence` (type: `integer`):

Only report technologies detected with at least this confidence.

## `includeDescriptions` (type: `boolean`):

Adds a short description for each detected technology (bigger output).

## `concurrency` (type: `integer`):

How many websites to analyze in parallel.

## `proxyConfiguration` (type: `object`):

Optional. Use Apify Proxy if target sites block datacenter traffic.

## Actor input object example

```json
{
  "urls": [
    "apify.com",
    "shopify.com",
    "nytimes.com"
  ],
  "maxExternalScripts": 10,
  "fetchDns": true,
  "minConfidence": 50,
  "includeDescriptions": false,
  "concurrency": 10,
  "proxyConfiguration": {
    "useApifyProxy": false
  }
}
```

# Actor output Schema

## `results` (type: `string`):

Websites with detected technologies stored in the default dataset (JSON/CSV/Excel via the dataset API).

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "urls": [
        "apify.com",
        "shopify.com",
        "nytimes.com"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("pulsedata/website-tech-stack-detector").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = { "urls": [
        "apify.com",
        "shopify.com",
        "nytimes.com",
    ] }

# Run the Actor and wait for it to finish
run = client.actor("pulsedata/website-tech-stack-detector").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "urls": [
    "apify.com",
    "shopify.com",
    "nytimes.com"
  ]
}' |
apify call pulsedata/website-tech-stack-detector --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,pulsedata/website-tech-stack-detector"
        }
    }
}

```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/gD3VehtlH9oBRGkma/builds/bvOanJH4qm89DhNJW/openapi.json