# Website Tech Stack Audit — Bulk BuiltWith Alternative API (`nexgendata/company-tech-stack-detector`) Actor

Detect any website's tech stack — frameworks, analytics, CDN, CMS, ecommerce platforms. Build competitive intelligence reports.

- **URL**: https://apify.com/nexgendata/company-tech-stack-detector.md
- **Developed by:** [NexGenData](https://apify.com/nexgendata) (community)
- **Categories:** SEO tools, Marketing, Developer tools
- **Features:** Limited permissions
- **Stats:** 11 total users, 0 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $100.00 / 1,000 tech stack records

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 Audit is a NexGenData tool on Apify that returns the frameworks, analytics, CDN, CMS and ecommerce platforms a site uses from each website's own pages.

Same product as Wappalyzer Replacement (nexgendata/wappalyzer-replacement) — this actor now runs the same fingerprint engine and returns the same fields.

## Tech Stack Detector — Wappalyzer & BuiltWith Alternative

**Point it at a domain, get the technology stack back.** A curated catalog of 251 named technology
fingerprints (CMS, analytics, frameworks, payment, hosting, ad-tech — the ones that matter for lead
qualification and competitive research), each with the evidence that matched, a version where the
site exposes one, and a confidence score. Bulk input, one row per domain analysed — built as a
drop-in for teams whose Wappalyzer/BuiltWith plan lapsed.

**Developer drop-in:** a direct Wappalyzer/BuiltWith replacement for detecting a site's tech stack in code.

### 📊 Sample Output

![2 real rows delivered by Tech Stack Detector — Wappalyzer & BuiltWith API Alternative — run UcbdwC3aS1JbijpKf on build 0.0.24](https://api.apify.com/v2/key-value-stores/8gLgXMBveEI1tTz1z/records/wappalyzer-replacement-sample)

| `url` | `status_code` | `tech_count` | `categories` | `technologies` | `scan_time_ms` |
|---|---|---|---|---|---|
| https://stripe.com | 200 | 10 | {"JavaScript Frameworks": \["Next.js", "React"], "JavaScri… | \[{"name": "Content Security Policy", "category": "Securit… | 1008 |
| https://shopify.com | 200 | 9 | {"Ecommerce": \["Shopify"], "CDN": \["Cloudflare"], "Miscel… | \[{"name": "Cloudflare", "category": "CDN", "evidence": "h… | 1218 |

Real rows from run `rOSGxokaCQcOVNrqM` on build 1.0.61 (2026-10-27), unedited apart from masked emails/phones and shortened long text; fields the source does not publish are empty.

### ⚙️ Sample inputs

This is the Store example input — the same input Apify's automated check runs — so it is proven to return rows on the current build. Paste it into the input form, or send it through the API, CLI or a schedule:

```json
{
  "urls": [
    "https://stripe.com",
    "https://shopify.com"
  ],
  "include_confidence": true,
  "include_versions": true,
  "timeout_seconds": 15
}
```

### 🔧 Input reference

| Field | Type | Default | What it does |
|---|---|---|---|
| `urls` | \['array', 'string'] | `["https://stripe.com", "https://shopify.com"]` | One or more website URLs to detect tech stack on. Accepts bare hosts ('example.com') or full URLs ('https://example.com/path') — scheme is auto-added if missing. Also accepted und… |
| `categories_filter` | array | `[]` | Optional: only return technologies whose category is in this list. Examples: 'CMS', 'Analytics', 'CDN', 'Ecommerce', 'JavaScript Frameworks', 'Payment Processors'. Leave empty to… |
| `include_confidence` | boolean | `true` | When true, each detected technology includes a 0–100 confidence score. Header matches score 100, script-src matches 90, HTML-body matches 85, implied-only techs score 60. |
| `include_versions` | boolean | `true` | When true, attempts to parse semantic version numbers out of matched headers, script URLs, and HTML. Example: '/react@18.2.0/' ⇒ version '18.2.0'. Version is null when no reliable… |
| `timeout_seconds` | integer | `15` | Per-URL HTTP request timeout. Range 3–60. Increase for slow sites or if you are analyzing heavy pages that need longer download time. |
| `startUrls` | array | `[]` | Alias of `urls`. Accepts plain URL strings or `{url: ...}` dict items. |
| `domains` | array | `[]` | Alias of `urls`. Bare hostnames work too — scheme is auto-added. |
| `websites` | array | `[]` | Alias of `urls`. |
| `targetUrls` | array | `[]` | Alias of `urls`. |
| `url` | string | `""` | Alternative — a single URL when you only need one. Comma-separated values are auto-split. |

### 🧾 JSON sample record

One real record from run `rOSGxokaCQcOVNrqM` (emails/phones masked, long text shortened):

```json
{
  "url": "https://stripe.com",
  "status_code": 200,
  "tech_count": 10,
  "categories": {
    "JavaScript Frameworks": [
      "Next.js",
      "React"
    ],
    "JavaScript Libraries": [
      "D3.js"
    ],
    "Web Servers": [
      "Nginx"
    ],
    "Miscellaneous": [
      "Open Graph",
      "Schema.org",
      "Twitter Card"
    ],
    "Security": [
      "Content Security Policy",
      "HSTS"
    ],
    "Programming Languages": [
      "Node.js"
    ]
  },
  "technologies": [
    {
      "name": "Content Security Policy",
      "category": "Security",
      "evidence": "header: content-security-policy",
      "version": null,
      "confidence": 100
    },
    {
      "name": "D3.js",
      "category": "JavaScript Libraries",
      "evidence": "script: https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/7654-bfe0f400d3277704.js",
      "version": "277704",
      "confidence": 90
    },
    {
      "name": "HSTS",
      "category": "Security",
      "evidence": "header: strict-transport-security",
      "version": null,
      "confidence": 100
    },
    {
      "name": "Next.js",
      "category": "JavaScript Frameworks",
      "evidence": "script: https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/polyfills-42372ed130431b0a.js",
      "version": null,
      "confidence": 90
    },
    {
      "name": "Nginx",
      "category": "Web Servers",
      "evidence": "header: server",
      "version": null,
      "confidence": 100
    },
    {
      "name": "Node.js",
      "category": "Programming Languages",
      "evidence": "implied by Next.js",
      "version": null,
      "confidence": 60
    },
    {
      "name": "Open Graph",
      "category": "Miscellaneous",
      "evidence": "html: p;h=180\"/><meta property=\"og:title\" content=\"Stripe | Finan",
      "version": null,
      "confidence": 85
    },
    {
      "name": "React",
      "category": "JavaScript Frameworks",
      "evidence": "implied by Next.js",
      "version": null,
      "confidence": 60
    },
    {
      "name": "Schema.org",
      "category": "Miscellaneous",
      "evidence": "html: rs\"></div><script type=\"application/ld+json\">{\"@context\":\"https://schema.",
      "version": null,
      "confidence": 85
    },
    {
      "name": "Twitter Card",
      "category": "Miscellaneous",
      "evidence": "html: website\"/><meta name=\"twitter:card\" content=\"summary_large_image",
      "version": null,
      "confidence": 85
    }
  ],
  "scan_time_ms": 1008,
  "final_url": "https://stripe.com/",
  "scan_status": "ok",
  "tech_names": "Content Security Policy, D3.js, HSTS, Next.js, Nginx, Node.js, Open Graph, React, Schema.org, Twitter Card",
  "category_list": "JavaScript Frameworks, JavaScript Libraries, Web Servers, Miscellaneous, Security, Programming Languages"
}
```

### 💰 Pricing

| Event | Price (USD) | When it is charged |
|---|---|---|
| Tech stack record (`apify-default-dataset-item`) | $0.1 | Full tech stack detection (headers + HTML + script-src) for one domain |

Pay-per-event: you pay only for what the run delivers. A run that delivers nothing bills no result events (only the actor-start event, when the actor defines one). Example: a run that delivers 100 results costs 100 × $0.1 = $10.00 plus the start fee.

### 🔗 Related Actors

More from the NexGenData **Leads, contacts & enrichment** family:

- [Shopify Store Detector — Tech, Theme & App Detection API](https://apify.com/nexgendata/shopify-store-detector?fpr=2ayu9b)
- [SSL Certificate Checker — Bulk Expiry & Chain Monitor](https://apify.com/nexgendata/ssl-certificate-checker?fpr=2ayu9b)
- [TikTok Creator Email Finder — Influencer Contact API](https://apify.com/nexgendata/tiktok-creator-email-finder?fpr=2ayu9b)
- [Website Email Extractor — Bulk Contact Scraper](https://apify.com/nexgendata/website-email-extractor?fpr=2ayu9b)
- [Yellow Pages Scraper — Local Business Leads API](https://apify.com/nexgendata/yellow-pages-scraper?fpr=2ayu9b)
- [YouTube Creator Contact Finder — Channel Email & Links API](https://apify.com/nexgendata/youtube-creator-contact-finder?fpr=2ayu9b)

30 more in this family on the [NexGenData Store page](https://apify.com/nexgendata?fpr=2ayu9b).

### 📊 What you get

Clean JSON output (9 fields):

- `categories` — Categories
- `category_list` — Category list
- `final_url` — Final url
- `scan_status` — Scan status
- `scan_time_ms` — Scan time ms
- `status_code` — Status code
- `tech_count` — Tech count
- `tech_names` — Tech names
- `technologies` — Technologies
- `url` — Url

**Pricing:** $0.1 per site (Pay-Per-Event) — about **10 per $1**. Live prices are in the Pricing table below.

### 🤖 Use with AI agents

Point Claude, the OpenAI Agents SDK, an n8n flow or any MCP-aware client at it.

**Sample agent prompt:**

```
Detect the technology stack (frameworks, analytics, CDN, payments) used by notion.so and stripe.com.
```

**Agentic payments (x402):** Supports agentic payment via x402 — call this actor with USDC, no API key required.

### 🔗 Related tools — Tech-stack detection

[Website Tech Stack Audit](https://apify.com/nexgendata/company-tech-stack-detector)

***

*A NexGenData utility actor.*

# Actor input Schema

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

One or more website URLs to detect tech stack on. Accepts bare hosts ('example.com') or full URLs ('https://example.com/path') — scheme is auto-added if missing. Also accepted under aliases: startUrls, domains, websites, targetUrls. Single string inputs and comma/newline-separated strings are auto-coerced to a list.

## `categories_filter` (type: `array`):

Optional: only return technologies whose category is in this list. Examples: 'CMS', 'Analytics', 'CDN', 'Ecommerce', 'JavaScript Frameworks', 'Payment Processors'. Leave empty to return all categories.

## `include_confidence` (type: `boolean`):

When true, each detected technology includes a 0–100 confidence score. Header matches score 100, script-src matches 90, HTML-body matches 85, implied-only techs score 60.

## `include_versions` (type: `boolean`):

When true, attempts to parse semantic version numbers out of matched headers, script URLs, and HTML. Example: '/react@18.2.0/' ⇒ version '18.2.0'. Version is null when no reliable signal is present.

## `timeout_seconds` (type: `integer`):

Per-URL HTTP request timeout. Range 3–60. Increase for slow sites or if you are analyzing heavy pages that need longer download time.

## `startUrls` (type: `array`):

Alias of `urls`. Accepts plain URL strings or `{url: ...}` dict items.

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

Alias of `urls`. Bare hostnames work too — scheme is auto-added.

## `websites` (type: `array`):

Alias of `urls`.

## `targetUrls` (type: `array`):

Alias of `urls`.

## `url` (type: `string`):

Alternative — a single URL when you only need one. Comma-separated values are auto-split.

## Actor input object example

```json
{
  "urls": [
    "https://stripe.com",
    "https://shopify.com"
  ],
  "categories_filter": [],
  "include_confidence": true,
  "include_versions": true,
  "timeout_seconds": 15,
  "startUrls": [],
  "domains": [],
  "websites": [],
  "targetUrls": [],
  "url": ""
}
```

# Actor output Schema

## `tech_stacks` (type: `string`):

One row per analysed domain: detected technologies with evidence, versions, categories and confidence.

# 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://stripe.com",
        "https://shopify.com"
    ],
    "categories_filter": [],
    "include_confidence": true,
    "include_versions": true,
    "timeout_seconds": 15,
    "startUrls": [],
    "domains": [],
    "websites": [],
    "targetUrls": [],
    "url": ""
};

// Run the Actor and wait for it to finish
const run = await client.actor("nexgendata/company-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://stripe.com",
        "https://shopify.com",
    ],
    "categories_filter": [],
    "include_confidence": True,
    "include_versions": True,
    "timeout_seconds": 15,
    "startUrls": [],
    "domains": [],
    "websites": [],
    "targetUrls": [],
    "url": "",
}

# Run the Actor and wait for it to finish
run = client.actor("nexgendata/company-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://stripe.com",
    "https://shopify.com"
  ],
  "categories_filter": [],
  "include_confidence": true,
  "include_versions": true,
  "timeout_seconds": 15,
  "startUrls": [],
  "domains": [],
  "websites": [],
  "targetUrls": [],
  "url": ""
}' |
apify call nexgendata/company-tech-stack-detector --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,nexgendata/company-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/aGYPQ0dc1nI2TLHMC/builds/M57WEzJHGRBD1qfyB/openapi.json