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

Detect what any website is built with: CMS, e-commerce, JS frameworks, analytics, tag managers, CDN/hosting, server, payments, chat, consent tools — with concrete evidence per match. Real-browser rendering catches React/Next/Vue SPAs that static scanners miss. Charged per site analyzed.

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

## Pricing

from $10.00 / 1,000 site analyzeds

This Actor is paid per event and usage. You are charged both the fixed price for specific events and for Apify platform usage.

Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#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 Tech Stack Detector — CMS, Frameworks, Analytics, Hosting

Find out what any website is built with: **CMS, e-commerce platform, JavaScript
frameworks, analytics, tag managers, CDN/hosting, web server, payments, chat
widgets, consent tools** and more — with the **concrete evidence** behind every
single detection.

Unlike HTTP-only detectors, this actor renders each site in a **real browser**,
so client-side frameworks (React, Next.js, Vue, Nuxt, Angular, Svelte…) are
detected from the live DOM and JS globals — the signals static scanners miss.

**Charged per site analyzed.** No startup fee. Failed sites cost $0.

### Quick start

```json
{
  "urls": ["https://www.allbirds.com", "https://nextjs.org"]
}
```

→ one dataset item per site:

```json
{
  "url": "https://www.allbirds.com",
  "techCount": 14,
  "cms": "Shopify",
  "frameworks": "React",
  "analytics": "Google Analytics (GA4), Hotjar",
  "hosting": "Cloudflare",
  "technologies": [
    { "name": "Shopify", "category": "ecommerce", "evidence": "asset: https://cdn.shopify.com/…" },
    { "name": "React", "category": "framework", "evidence": "dom: [data-reactroot]" },
    { "name": "Stripe", "category": "payments", "evidence": "asset: https://js.stripe.com/v3" }
  ]
}
```

### What it detects (100+ technologies)

| Category | Examples |
|---|---|
| **CMS & builders** | WordPress, Drupal, Ghost, Wix, Squarespace, Webflow, Framer, Contentful, Sanity |
| **E-commerce** | Shopify, WooCommerce, Magento, BigCommerce, PrestaShop, Salesforce Commerce |
| **JS frameworks** | React, Next.js, Gatsby, Remix, Vue, Nuxt, Angular, Svelte(Kit), Astro, Alpine, htmx, jQuery |
| **Analytics** | GA4, GTM, Plausible, Fathom, Matomo, Hotjar, Clarity, Mixpanel, Amplitude, Segment, PostHog |
| **Marketing & support** | Facebook Pixel, LinkedIn Insight, HubSpot, Klaviyo, Intercom, Drift, Crisp, Zendesk |
| **CDN & hosting** | Cloudflare, Fastly, Akamai, CloudFront, Vercel, Netlify, Fly.io, GitHub Pages |
| **Server & language** | nginx, Apache, IIS, Caddy, Express, PHP, ASP.NET, Laravel, Django, Rails |
| **Payments** | Stripe, PayPal, Braintree, Razorpay |
| **Security & consent** | reCAPTCHA, hCaptcha, Turnstile, OneTrust, Cookiebot, Sentry |

Every match includes its **evidence** — the exact header, script URL, cookie
name, DOM marker, or JS global that triggered it — so you can trust (and audit)
the results.

### Use cases

- **Lead qualification / market research:** run your prospect list through it —
  "all sites still on Magento", "everyone using competitor X's chat widget."
- **Competitive analysis:** what stack do the top players in your niche run?
- **Agency audits:** instant technology inventory for a new client's site.
- **Sales intelligence:** pair with the dataset export (CSV/JSON/Excel) and feed
  your CRM.

```bash
curl -X POST "https://api.apify.com/v2/acts/fetchbase~tech-stack-detector/run-sync-get-dataset-items?token=YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"urls": ["https://example.com"]}'
```

### Pricing

A small fixed price **per site successfully analyzed**, plus standard Apify
platform usage. Failed sites are never billed.

### FAQ

**How is this different from Wappalyzer-style browser extensions?** Same idea,
but as an API you can run on thousands of URLs, with per-match evidence, and
rendered-DOM detection for SPA frameworks.

**Is this responsible to run on any site?** Yes — it reads public technical
metadata only (headers, asset URLs, markup patterns, cookie *names*). It
extracts no content and no personal data.

**A site failed — was I charged?** No. Only successful analyses are billed.

***

Missing a technology you need detected? **Open an issue** — fingerprints are
added fast. If this saves you time, a ⭐ review helps others find it.

### More tools by Fetchbase

Part of a suite of fast, no-nonsense web utilities — all pay-per-result, charged only on success, no startup fee:

- [Website Screenshot API](https://apify.com/fetchbase/web-screenshot-pro) — full-page PNG / JPEG / WebP / PDF
- [Website to Markdown](https://apify.com/fetchbase/website-to-markdown) — clean Markdown for LLMs & RAG
- [PDF & DOCX to Markdown](https://apify.com/fetchbase/document-to-markdown) — documents → Markdown for RAG
- [SEO Audit + Core Web Vitals](https://apify.com/fetchbase/website-seo-audit) — scored on-page audit with fixes
- [Website Performance Audit](https://apify.com/fetchbase/website-performance-audit) — bulk Core Web Vitals & page speed
- [Tech Stack Detector](https://apify.com/fetchbase/tech-stack-detector) — CMS, frameworks, analytics, hosting
- [Domain, DNS & WHOIS Lookup](https://apify.com/fetchbase/domain-dns-intelligence) — records, registration, SSL
- [RSS Feed Reader](https://apify.com/fetchbase/rss-feed-reader) — RSS / Atom / JSON → normalized JSON
- [Job Postings API](https://apify.com/fetchbase/job-postings-scraper) — Greenhouse, Lever, Ashby & more

### Use with AI agents (MCP)

This Actor is callable by AI agents through the [Apify MCP server](https://mcp.apify.com/). Agents in Claude, Cursor, Windsurf, LangGraph, CrewAI and others can discover it via `search-actors` and run it as a tool — its inputs and outputs are fully described in the schema for reliable agent use.

***

#### Was this Actor useful?

If it saved you time, please consider leaving an honest review. Reviews are the main way
independent Actors get discovered on Apify — a single one makes a real difference, and
critical feedback is just as welcome as praise.

Something missing or broken? Open an issue instead and it will get fixed.

# Actor input Schema

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

Websites to analyze. Each produces one dataset item with the full detected stack (one billable event per site).

## `includeEvidence` (type: `boolean`):

Attach the concrete signal that triggered each detection (header value, script URL, DOM marker) — useful for verifying matches.

## `waitUntil` (type: `string`):

When to consider the page loaded before analyzing.

## `timeoutMs` (type: `integer`):

Max time to wait for a page before analyzing whatever loaded.

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

Off by default (fast, works on most sites). Enable Apify Proxy — including residential — for bot-protected sites that block datacenter IPs.

## Actor input object example

```json
{
  "urls": [
    "https://example.com",
    "https://www.allbirds.com"
  ],
  "includeEvidence": true,
  "waitUntil": "load",
  "timeoutMs": 45000,
  "proxyConfiguration": {
    "useApifyProxy": false
  }
}
```

# 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"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("fetchbase/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"] }

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

# Fetch and print Actor results from the run's dataset (if there are any)
print("💾 Check your data here: https://console.apify.com/storage/datasets/" + run["defaultDatasetId"])
for item in client.dataset(run["defaultDatasetId"]).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"
  ]
}' |
apify call fetchbase/tech-stack-detector --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "command": "npx",
            "args": [
                "mcp-remote",
                "https://mcp.apify.com/?tools=fetchbase/tech-stack-detector",
                "--header",
                "Authorization: Bearer <YOUR_API_TOKEN>"
            ]
        }
    }
}

```

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/acts/thjt8bfVoehaDNBVG/builds/fOf9db6c21HASKMdn/openapi.json