Tech Stack Checker — Check Any Website's Technology Stack for Free
Want to know what technology a website uses? DataFragment's free tech stack checker scans any URL and reveals its full technology profile — CMS, frameworks, analytics, payment processors, hosting and 3,900+ other technologies. No signup required.
What Is a Tech Stack Checker?
A tech stack checker (also called a technology lookup tool or website technology detector) analyzes a website's source code, HTTP headers, JavaScript libraries, cookies and DNS records to identify the technologies it uses. This includes:
Frontend
React, Vue.js, Angular, Next.js, Nuxt, Svelte, jQuery, Tailwind CSS, Bootstrap
CMS & E-commerce
WordPress, Shopify, WooCommerce, Magento, PrestaShop, Wix, Squarespace
Analytics & Marketing
Google Analytics, Facebook Pixel, HubSpot, Hotjar, Mixpanel, Segment
Payments & Infrastructure
Stripe, PayPal, Cloudflare, AWS, Google Cloud, Nginx, Apache
Why Check a Website's Tech Stack?
- Sales prospecting: Find companies using a specific technology (e.g., all Shopify stores in France) and export a lead list with company info, traffic data and contact details.
- Competitive analysis: Understand what your competitors use for their CMS, analytics, A/B testing and marketing stack.
- Market research: Quantify market share for any technology — how many websites use React vs Vue, or Stripe vs PayPal.
- Partnership targeting: If you build a Shopify app, find all Shopify stores to promote it. If you sell migration services, find sites on legacy platforms.
- Security audits: Detect outdated libraries, vulnerable plugins or misconfigured infrastructure on your own sites.
How to Use DataFragment's Tech Stack Checker
- Single domain lookup: Go to the Technology Lookup page, type any domain and get its full technology profile instantly — for free.
- Bulk search by technology: Use the Search page to find all websites using a specific technology. Filter by country, traffic, company size and more.
- Export to CSV: Download your results with domain, traffic data, company name, employee count, contact email and social profiles. Starting at $9 for 100 leads.
DataFragment vs Other Tech Stack Checkers
| Feature | DataFragment | BuiltWith | Wappalyzer |
|---|---|---|---|
| Free tech stack lookup | Unlimited | Limited | 50/month |
| Technologies tracked | 3,900+ | 95,000+ | 1,800+ |
| Domains indexed | 6M+ | 673M+ | N/A |
| Lead export (CSV) | From $9 | From $295/mo | From $250/mo |
| Company enrichment | Included | Included | Separate plan |
| Subscription required | No — pay per export | Yes (annual) | Yes (monthly) |
Most Popular Technology Searches
Check Any Website's Tech Stack — Free
Look up any domain's technology stack instantly. Then search across 6M+ websites to find companies using any technology — and export the list with traffic, company info and contact emails.