# Tech Stack Detector - Wappalyzer & BuiltWith Alternative (`poetsc/tech-stack-detector`) Actor

Find out what any website is built with: CMS, ecommerce platform, analytics, frameworks, CDN, hosting, email provider and 7,600+ other technologies, with versions and evidence. Bulk URLs, $5 per 1,000 sites.

- **URL**: https://apify.com/poetsc/tech-stack-detector.md
- **Developed by:** [Poetsc Data](https://apify.com/poetsc) (community)
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $5.00 / 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?

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

### What does Tech Stack Detector do?

Tech Stack Detector tells you what any website is built with. Give it a list of domains and it returns the CMS, ecommerce platform, JavaScript frameworks, analytics and marketing tools, CDN, hosting, web server, email provider and more, drawn from **7,600+ technology fingerprints** (the open-source Wappalyzer successor database).

It's a bulk, API-friendly alternative to Wappalyzer and BuiltWith lookups: **$5 per 1,000 websites**, no subscription, no browser extension, no API key to manage.

### What you get for each website

- **Technologies** with name, **version** when it can be read (e.g. WordPress 7.2, Gutenberg 24.0.0), categories, confidence, official website and CPE identifier
- **Evidence** for every detection (HTML, script URL, header, cookie, meta tag, DOM, DNS) so you can see why it was flagged
- **By category** summary: CMS, Ecommerce, Analytics, Tag managers, CDN, Web servers, Email, and 100+ more
- **Email provider** read from MX records: Google Workspace, Microsoft 365, Proofpoint, Mimecast, Zoho, Tencent Exmail and more
- **Company SaaS footprint** (`companySaas`): tools the company has verified its domain with, found in DNS TXT records, such as Atlassian, DocuSign, Zoom, Miro, Slack, HubSpot, Adobe and Stripe. Useful for sales targeting, and kept separate from the website's own stack
- Page title, meta description, final URL after redirects, HTTP status, server header, response time

### Use cases

- **Sales prospecting and lead qualification**: find every Shopify or WooCommerce store in a list, or every company on HubSpot vs Salesforce
- **Competitor research**: see which analytics, A/B testing, chat and ad tools competitors run
- **Market sizing**: count how many sites in a list use a given CMS or framework
- **Security and IT audits**: inventory software and versions (with CPE) across your own domains
- **Agencies**: qualify leads before pitching a migration or redesign

### How to use it

1. Paste domains or URLs into **Websites** (one per line). `example.com` is fine.
2. Keep **Check DNS records** on for email and SaaS detection.
3. Click **Start**. Download results as JSON, CSV or Excel, or call the Actor via API, Make, Zapier or n8n.

### Input example

```json
{
  "urls": ["wordpress.org", "https://www.shopify.com", "https://www.bbc.com"],
  "checkDns": true
}
```

### Output example

```json
{
  "url": "https://wordpress.org",
  "finalUrl": "https://wordpress.org/",
  "domain": "wordpress.org",
  "statusCode": 200,
  "title": "Blog Tool, Publishing Platform, and CMS – WordPress.org",
  "technologyCount": 13,
  "technologies": [
    {
      "name": "WordPress",
      "version": "7.2",
      "confidence": 100,
      "categories": ["CMS", "Blogs"],
      "website": "https://wordpress.org",
      "cpe": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
      "oss": true,
      "implied": false,
      "evidence": ["html", "script", "inlineScript", "header", "meta", "dom"]
    }
  ],
  "byCategory": {
    "CMS": ["WordPress"],
    "Web servers": ["Nginx"],
    "Programming languages": ["PHP"],
    "Databases": ["MySQL"],
    "Tag managers": ["Google Tag Manager"]
  },
  "companySaas": [
    { "name": "Atlassian Cloud", "categories": ["Issue trackers"], "website": "https://www.atlassian.com" }
  ],
  "emailProvider": "Google Workspace",
  "blocked": false,
  "server": "nginx",
  "error": null
}
```

### How much does it cost?

**$5 per 1,000 websites analyzed** ($0.005 each). Sites that fail to load (DNS errors, timeouts, blocked pages with nothing detected) are **not charged**; they are listed in the `FAILED_URLS` record of the run's key-value store.

### Accuracy and limits

- Detection works on the page HTML, response headers, cookies, scripts and DNS, without running a full browser. That makes it fast and cheap. Technologies that only reveal themselves through JavaScript executed after page load may be missed.
- Some sites block automated requests (`blocked: true`). If DNS still reveals the email provider or SaaS tools you get those; if nothing at all is found the site is reported as failed and not charged.
- `implied: true` means the technology was inferred from another one (for example WordPress implies PHP).

### Credits

Fingerprints come from the open-source [webappanalyzer](https://github.com/enthec/webappanalyzer) project (GPL-3.0).

### Feedback

Missing a technology or seeing a false positive? Open an issue on the Issues tab with the URL.

# Actor input Schema

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

Domains or URLs to analyze, one per line. "example.com" and "https://example.com/page" both work.

## `checkDns` (type: `boolean`):

Look up MX, TXT, NS and CNAME records to detect email providers (Google Workspace, Microsoft 365), DNS/CDN providers and SaaS verification records (HubSpot, Atlassian, Adobe, etc.).

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

Adds a one-paragraph description of each detected technology.

## `maxConcurrency` (type: `integer`):

How many websites to analyze at the same time.

## `timeoutSecs` (type: `integer`):

Give up on a site after this many seconds. Timed-out sites are not charged.

## Actor input object example

```json
{
  "urls": [
    "https://wordpress.org",
    "https://www.shopify.com",
    "https://www.bbc.com"
  ],
  "checkDns": true,
  "includeDescriptions": false,
  "maxConcurrency": 5,
  "timeoutSecs": 30
}
```

# Actor output Schema

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

No description

# 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": [
        "https://wordpress.org",
        "https://www.shopify.com",
        "https://www.bbc.com"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("poetsc/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": [
        "https://wordpress.org",
        "https://www.shopify.com",
        "https://www.bbc.com",
    ] }

# Run the Actor and wait for it to finish
run = client.actor("poetsc/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": [
    "https://wordpress.org",
    "https://www.shopify.com",
    "https://www.bbc.com"
  ]
}' |
apify call poetsc/tech-stack-detector --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,poetsc/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/BdvfYkk4QyT49V4Z3/builds/msiZnTRyvgupmGIhC/openapi.json