# 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:** 2 total users, 0 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 a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases.
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.

In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js/docs.md):

```bash
npm install apify-client
```

In Python projects, use official [Python client library](https://docs.apify.com/api/client/python/docs.md):

```bash
pip install apify-client
```

In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md):

````bash
# MacOS / Linux
curl -fsSL https://apify.com/install-cli.sh | bash
# Windows
irm https://apify.com/install-cli.ps1 | iex
```bash

In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/integrations/mcp.md).

If your project is in a different language, use 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.

# 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

```json
{
    "openapi": "3.0.1",
    "info": {
        "title": "Tech Stack Detector — BuiltWith & Wappalyzer Alternative",
        "description": "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.",
        "version": "0.1",
        "x-build-id": "Efz8fevMK74tQdwyM"
    },
    "servers": [
        {
            "url": "https://api.apify.com/v2"
        }
    ],
    "paths": {
        "/acts/fetchbase~tech-stack-detector/run-sync-get-dataset-items": {
            "post": {
                "operationId": "run-sync-get-dataset-items-fetchbase-tech-stack-detector",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        },
        "/acts/fetchbase~tech-stack-detector/runs": {
            "post": {
                "operationId": "runs-sync-fetchbase-tech-stack-detector",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor and returns information about the initiated run in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/runsResponseSchema"
                                }
                            }
                        }
                    }
                }
            }
        },
        "/acts/fetchbase~tech-stack-detector/run-sync": {
            "post": {
                "operationId": "run-sync-fetchbase-tech-stack-detector",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        }
    },
    "components": {
        "schemas": {
            "inputSchema": {
                "type": "object",
                "required": [
                    "urls"
                ],
                "properties": {
                    "urls": {
                        "title": "Website URLs",
                        "type": "array",
                        "description": "Websites to analyze. Each produces one dataset item with the full detected stack (one billable event per site).",
                        "items": {
                            "type": "string"
                        }
                    },
                    "includeEvidence": {
                        "title": "Include evidence",
                        "type": "boolean",
                        "description": "Attach the concrete signal that triggered each detection (header value, script URL, DOM marker) — useful for verifying matches.",
                        "default": true
                    },
                    "waitUntil": {
                        "title": "Wait until",
                        "enum": [
                            "load",
                            "domcontentloaded",
                            "networkidle"
                        ],
                        "type": "string",
                        "description": "When to consider the page loaded before analyzing.",
                        "default": "load"
                    },
                    "timeoutMs": {
                        "title": "Navigation timeout (ms)",
                        "minimum": 5000,
                        "maximum": 120000,
                        "type": "integer",
                        "description": "Max time to wait for a page before analyzing whatever loaded.",
                        "default": 45000
                    },
                    "proxyConfiguration": {
                        "title": "Proxy",
                        "type": "object",
                        "description": "Off by default (fast, works on most sites). Enable Apify Proxy — including residential — for bot-protected sites that block datacenter IPs.",
                        "default": {
                            "useApifyProxy": false
                        }
                    }
                }
            },
            "runsResponseSchema": {
                "type": "object",
                "properties": {
                    "data": {
                        "type": "object",
                        "properties": {
                            "id": {
                                "type": "string"
                            },
                            "actId": {
                                "type": "string"
                            },
                            "userId": {
                                "type": "string"
                            },
                            "startedAt": {
                                "type": "string",
                                "format": "date-time",
                                "example": "2025-01-08T00:00:00.000Z"
                            },
                            "finishedAt": {
                                "type": "string",
                                "format": "date-time",
                                "example": "2025-01-08T00:00:00.000Z"
                            },
                            "status": {
                                "type": "string",
                                "example": "READY"
                            },
                            "meta": {
                                "type": "object",
                                "properties": {
                                    "origin": {
                                        "type": "string",
                                        "example": "API"
                                    },
                                    "userAgent": {
                                        "type": "string"
                                    }
                                }
                            },
                            "stats": {
                                "type": "object",
                                "properties": {
                                    "inputBodyLen": {
                                        "type": "integer",
                                        "example": 2000
                                    },
                                    "rebootCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "restartCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "resurrectCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "computeUnits": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            },
                            "options": {
                                "type": "object",
                                "properties": {
                                    "build": {
                                        "type": "string",
                                        "example": "latest"
                                    },
                                    "timeoutSecs": {
                                        "type": "integer",
                                        "example": 300
                                    },
                                    "memoryMbytes": {
                                        "type": "integer",
                                        "example": 1024
                                    },
                                    "diskMbytes": {
                                        "type": "integer",
                                        "example": 2048
                                    }
                                }
                            },
                            "buildId": {
                                "type": "string"
                            },
                            "defaultKeyValueStoreId": {
                                "type": "string"
                            },
                            "defaultDatasetId": {
                                "type": "string"
                            },
                            "defaultRequestQueueId": {
                                "type": "string"
                            },
                            "buildNumber": {
                                "type": "string",
                                "example": "1.0.0"
                            },
                            "containerUrl": {
                                "type": "string"
                            },
                            "usage": {
                                "type": "object",
                                "properties": {
                                    "ACTOR_COMPUTE_UNITS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_WRITES": {
                                        "type": "integer",
                                        "example": 1
                                    },
                                    "KEY_VALUE_STORE_LISTS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_INTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_EXTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_SERPS": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            },
                            "usageTotalUsd": {
                                "type": "number",
                                "example": 0.00005
                            },
                            "usageUsd": {
                                "type": "object",
                                "properties": {
                                    "ACTOR_COMPUTE_UNITS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_WRITES": {
                                        "type": "number",
                                        "example": 0.00005
                                    },
                                    "KEY_VALUE_STORE_LISTS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_INTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_EXTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_SERPS": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
```