Free maker tool
Tech Stack Detector
Enter any URL and instantly see what the site is built with — frameworks, CSS, hosting, analytics, payments, and more. Detected from public signals, no login required.
What we detect
40+ technologies across 12 categories, detected from public HTML and response headers.
Technologies detected
A selection of the specific tools and frameworks we identify. The full fingerprint list is broader — these are the most commonly found technologies.
Framework
Next.js
Nuxt
React
Vue.js
SvelteKit Svelte
Astro
Remix
AngularCSS
Tailwind CSS
Bootstrap
Bulma
Chakra UI
Mantine
shadcn/uiHosting
Vercel
Cloudflare
Netlify
AWS
Google Cloud
Railway
Fly.io
HerokuBackend
Express
Django
Laravel
Ruby on Rails
PHP
ASP.NETCMS
WordPress
Ghost
Contentful
Sanity
Strapi
PrismicNo-Code
Webflow
Framer
Bubble
Wix
SquarespaceE-Commerce
Shopify
WooCommerce
BigCommerce
MagentoAnalytics
Google Analytics 4
Plausible
PostHog
Mixpanel
Amplitude
Hotjar
FathomPayments
Stripe
Paddle
Lemon Squeezy
Polar.sh
PayPal
BraintreeSupport
Intercom
Crisp
Zendesk
Help Scout
Tidio
Tawk.toAuth
Supabase Auth
Auth0
Clerk
Firebase Auth
OktaAI
OpenAI
Chatbase Intercom Fin Crisp AIWhy founders check competitor stacks
A site’s tech choices are a compressed signal about team size, build philosophy, and infrastructure cost. Here’s what founders actually look for.
Benchmark your own stack decisions
When a fast-moving product is getting traction, founders want to know if they’re outbuilding you. Seeing Next.js + Vercel vs a bare Express server is a useful signal.
Estimate infrastructure costs
Cloudflare vs heavy AWS footprints often hints at burn rate and team size. Visible stack tools are a compressed spend signal.
Get stack inspiration for your own build
Successful products show what works at scale. Seeing three similar products share a payment stack removes decision paralysis.
Spot acquisition due diligence signals
A site still running legacy front-end patterns or missing basic analytics can suggest limited engineering investment.
How detection works
01
Fetch the page
We fetch the public HTML from the URL you provide — same as any visitor.
02
Read the signals
HTTP headers (Server, X-Powered-By, CF-Ray) and HTML patterns (script URLs, CSS classes, data attributes) reveal the stack.
03
Group and display
40+ technology fingerprints matched and grouped by category with confidence indicators.
Try it on popular sites
Frequently Asked Questions
How do I find out what a website is built with?
Paste any public URL above and hit Detect. LaunchZone fetches the page HTML and response headers, then matches them against a fingerprint list of frameworks, CSS, hosting, analytics, payments, and more.
Is this tech stack detector free?
Yes. Tech Stack Detector is a free LaunchZone maker tool — no account required.
How accurate is tech stack detection?
Detection is based on public HTML and HTTP headers only. High-confidence matches (Next.js __NEXT_DATA__, Cloudflare CF-Ray, Stripe.js) are reliable. Some stacks hide behind CDNs or custom builds and may not appear.
Can this detect if a site uses Next.js or React?
Yes. Next.js is detected via __NEXT_DATA__ and /_next/ assets. React alone is harder when bundled without obvious markers — Next.js / Remix take priority when both signals exist.
Can this detect Cloudflare or Vercel hosting?
Yes. Cloudflare usually exposes CF-Ray; Vercel exposes x-vercel-id / x-vercel-cache. Netlify, Fly.io, Railway, and common AWS CloudFront signals are also checked.
Why can’t you detect a site’s database?
Databases almost never leave public HTML or response-header fingerprints. We intentionally skip guessing — only public client-side and edge signals are reported.
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