# Website Tech Stack Detector: BuiltWith Alternative, Bulk API (`hirepulse/website-tech-stack-detector`) Actor

Domains in, one row each: has_meta_pixel, has_google_ads_tag, has_ga4, ad_pixels, analytics, marketing_tools, cms, ecommerce, hosting_cdn, email_provider, spf_senders, dmarc_policy. Use this when qualifying leads by their stack. Do NOT use for traffic or ad spend. $0.003 per domain.

- **URL**: https://apify.com/hirepulse/website-tech-stack-detector.md
- **Developed by:** [HirePulse](https://apify.com/hirepulse) (community)
- **Categories:** Lead generation, Agents
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $2.40 / 1,000 domain checkeds

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

## Website Tech Stack, Ad Pixels & DNS Detector by Domain

**Give it company websites, get one short row per company:** which ad pixels and analytics run on the site, the marketing tools, CMS or e-commerce platform, hosting, and what the domain's DNS says about email (provider, sending services, DMARC policy).

### Quick start

Detect website frameworks, advertising pixels and DNS email signals.

Example input:

```json
{
  "domains": [
    "stripe.com"
  ],
  "track_diff": false
}
```

Example successful output (illustrative values, selected fields; not current measurements):

```json
{
  "domain": "stripe.com",
  "status": "ok",
  "frameworks": [
    "Next.js",
    "React"
  ],
  "email_provider": "Google Workspace",
  "technology_count": 2
}
```

Price: $0.003 per analyzed domain.

***

Built for lead qualification and AI agents: flat fields such as `has_meta_pixel` and `has_google_ads_tag` answer "does this company advertise?" without reading a long list.

Use this when you need to qualify or segment companies by their stack. Do NOT use it for traffic numbers or ad spend.

### Input

```json
{ "domains": ["stripe.com", "notion.so", "gymshark.com"] }
```

| Field | What it does |
| --- | --- |
| `domains` | Company websites, up to 100 per run. Full URLs are fine. |
| `track_diff` | Compare with your previous run and fill `added` and `removed`. |
| `state_id` | Name of the saved history, one per watchlist. |
| `only_changes` | With `track_diff`: return only domains whose stack changed. |

### Output (one row per domain)

```json
{
  "domain": "gymshark.com",
  "status": "ok",
  "has_meta_pixel": true,
  "has_google_ads_tag": true,
  "has_ga4": true,
  "has_gtm": true,
  "has_linkedin_insight": false,
  "has_tiktok_pixel": true,
  "ad_pixels": ["Meta Pixel", "Google Ads", "TikTok Pixel"],
  "analytics": ["Google Analytics 4", "Google Tag Manager"],
  "marketing_tools": ["Klaviyo"],
  "cms": null,
  "ecommerce": "Shopify",
  "hosting_cdn": ["Cloudflare"],
  "email_provider": "Google Workspace",
  "spf_senders": ["Google Workspace", "Klaviyo"],
  "dmarc_policy": "reject",
  "verified_services": ["Google Search Console", "Meta Business"],
  "technology_count": 9
}
```

The example shows the format; run the Actor for real values. `status` is `ok`, `blocked` (the site refused automated access), `unreachable`, `invalid_input` or `not_checked`. Only `ok` is charged.

A small run summary is saved to the key-value store under `OUTPUT`. It also lists `related_tools`: other HirePulse tools that add data for the same input.

### How it works

- One plain HTTP request to the home page. No browser, no proxy.
- About 60 technologies are recognised by their public script hosts, tag IDs and response headers, from our own signature list.
- Ad pixels and analytics configured inside the site's Google Tag Manager container are found too.
- DNS (MX, TXT, DMARC) is read over DNS-over-HTTPS.

A BuiltWith / Wappalyzer alternative for the questions sales and marketing teams ask most.

### Limitations

- Only the home page is checked. Tools loaded only on other pages, or only after a cookie consent click, may be missed.
- Websites that block automated requests are reported as `blocked` and not charged.
- Detection is pattern-based; it tells you a tag is present, not how it is used.

### More tools from HirePulse

- [Google Ads Transparency Scraper](https://apify.com/hirepulse/google-ads-transparency-scraper): the actual ads behind a detected Google Ads tag.
- [Company Intent Radar](https://apify.com/hirepulse/company-intent-radar): hiring, Google ads, SEO traffic and email provider per company.

# Actor input Schema

## `domains` (type: `array`):

Required. Company websites, one per item, up to 100 per run. Full URLs are fine too. Example: \["stripe.com", "gymshark.com"].

## `track_diff` (type: `boolean`):

Compare with the previous run that used the same state_id and fill added and removed (technologies new or gone). History is kept per domain in your own Apify account. Default: false.

## `state_id` (type: `string`):

Name of the saved history for change tracking. Use one value per watchlist. Example: "competitors". Default: "tech_state".

## `only_changes` (type: `boolean`):

With track_diff: return only domains whose technologies changed since the last run (plus first runs). Default: false.

## Actor input object example

```json
{
  "domains": [
    "stripe.com",
    "notion.so",
    "gymshark.com"
  ],
  "track_diff": false,
  "state_id": "tech_state",
  "only_changes": false
}
```

# Actor output Schema

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

Dataset items: one row per domain.

## `runSummary` (type: `string`):

Counts of checked, charged and unreachable domains. Also lists related_tools: other HirePulse tools that add data for the same input.

# 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 = {
    "domains": [
        "stripe.com",
        "notion.so",
        "gymshark.com"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("hirepulse/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 = { "domains": [
        "stripe.com",
        "notion.so",
        "gymshark.com",
    ] }

# Run the Actor and wait for it to finish
run = client.actor("hirepulse/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 '{
  "domains": [
    "stripe.com",
    "notion.so",
    "gymshark.com"
  ]
}' |
apify call hirepulse/website-tech-stack-detector --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,hirepulse/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/nqsBFSc89LMPagbmA/builds/LGqMkUCyTwmu91TSW/openapi.json