How to Detect Website Technology Stacks with Scraping

Knowing what technologies a website uses is valuable for sales prospecting, competitive intelligence, and security research. Tools like BuiltWith charge hundreds per month -- here's how to build your own detector. What We Can Detect By analyzing HTTP headers, HTML source, JavaScript files, and cookies, we can identify frameworks, CMS platforms, analytics tools, CDNs, and more. Technology Stack Detector pip install requests beautifulsoup4 tldextract import requests from bs4 import BeautifulSoup import json class TechStackDetector : def __init__ ( self , api_key ): self . api_key = api_key self . signatures = { " WordPress " : { " html " : [ " wp-content " , " wp-includes " ]}, " React " : { " html " : [ " __NEXT_DATA__ " , " react-root " , " _reactRootContainer " ]}, " Vue.js " : { " html " : [ " __VUE__ " , " v-cloak " , " vue-app " ]}, " Angular " : { " html " : [ " ng-version " , " ng-app " ]}, " Next.js " : { " html " : [ " __NEXT_DATA__ " , " _next/static " ]}, " Shopify " : { " ht