How to Find What Technology a Website Uses
Want to know what technologies a website uses? DataFragment's technology lookup scans 5.4 million domains and detects 3,900+ technologies — from CMS and JavaScript frameworks to payment processors and analytics tools. Completely free, no registration required.
Try the Free Lookup ToolWhat Is a Technology Lookup?
A technology lookup (also called a tech stack checker or website technology checker) is a tool that analyzes a website's source code, HTTP headers, DNS records, and JavaScript libraries to identify the software powering it. Think of it as an X-ray for websites: it reveals the CMS (WordPress, Shopify, Webflow), the frontend framework (React, Vue, Angular), the analytics suite (Google Analytics, Hotjar, Mixpanel), the payment gateway (Stripe, PayPal, Adyen), the hosting infrastructure (AWS, Cloudflare, Vercel), and dozens of other categories.
Technology lookups have become essential for modern B2B workflows. Sales teams use them to qualify leads by identifying companies that already use complementary or competing products. Marketing teams analyze competitor stacks to understand market trends and positioning. Developers audit third-party dependencies for security and performance. Investors evaluate a startup's technical maturity before writing a check. In every case, the ability to see what's under the hood transforms guesswork into data-driven decisions.
Why DataFragment Beats the Alternatives
The two most well-known technology lookup tools are BuiltWith and Wappalyzer. BuiltWith charges $295 per month for its Pro plan, and even its basic tier limits the number of reports you can pull. Wappalyzer recently moved to a paid model starting at $250 per month, locking its best features — bulk lookups, lead lists, CRM integrations — behind expensive subscriptions. For startups, freelance developers, and lean sales teams, those prices are hard to justify.
DataFragment takes a different approach. Individual technology lookups are completely free. You can check any website's tech stack without creating an account, without entering a credit card, and without hitting an arbitrary monthly limit. Our detection engine covers 2026's most popular technologies across 70+ categories, and our database of 5.4 million pre-scanned domains means results are near-instant.
Where DataFragment truly shines is lead generation. Once you've identified a technology, you can search our entire database for every website running that same stack — then filter by country, monthly traffic, and company size. When you're ready to reach out, export the list as a CSV. The first 10 rows of every export are free; larger packs start at just $9. Compare that to $295/month and the value speaks for itself. See our pricing page for details.
How to Use DataFragment's Technology Lookup
Enter a URL
Type or paste any website URL into the lookup bar. No signup or API key needed — just the domain name.
View the full tech stack
Instantly see every technology detected: CMS, JavaScript frameworks, payment processors, analytics tools, hosting providers, and more.
Find similar websites
Spotted an interesting technology? Search across our database of 5.4 million domains to find every other site running the same stack.
Export your leads
Filter by technology, country, traffic, and company size — then export the results as a CSV ready for your CRM or outreach tool.
Who Uses Technology Lookups?
- *Sales teams — Identify prospects already using a competitor's product (or a complementary tool) and tailor your outreach accordingly.
- *Marketing teams — Analyze which technologies dominate a market segment and create data-backed content or competitive positioning.
- *Developers & security teams — Audit client sites for outdated libraries, vulnerable plugins, or suboptimal hosting configurations.
- *Investors & analysts — Evaluate a company's technical sophistication and infrastructure choices before making funding decisions.
Ready to Check a Website's Tech Stack?
Enter any URL and get a full technology breakdown in seconds. No signup, no credit card, no limits on individual lookups.
Launch the Free Technology Lookup