Web technology intelligence

Uncover the stack behind any website.

Analytics, CMS, frameworks, hosting, payments — detected across 20.4M domains, refreshed every day.

Try
S
stripe.com
15 technologies detected · lang en
live
JavaScript frameworks2
ReReact↗NeNext.js↗
Payment processors1
StStripe↗
+ 11 more in 8 categories

Most used on the web

#1
jQuery
JavaScript libraries
5.0M sites
#2
PHP
Programming languages
4.5M sites
#3
HTTP/3
Miscellaneous
3.8M sites
#4
HSTS
Security
3.7M sites
#5
MySQL
Databases
3.4M sites
#6
Cloudflare
CDN
3.3M sites
#7
WordPress
CMS
3.3M sites
#8
Nginx
Web servers
2.5M sites
#9
Google Analytics
Analytics
2.3M sites
#10
jQuery Migrate
JavaScript libraries
2.3M sites
#11
Apache HTTP Server
Web servers
1.8M sites
#12
Google Tag Manager
Tag managers
1.6M sites
#13
Bootstrap
UI frameworks
1.5M sites
#14
Yoast SEO
SEO
1.2M sites
#15
WordPress Block Editor
Page builders
774.3k sites
#16
LiteSpeed
Web servers
770.4k sites
#17
Elementor
Page builders
718.1k sites
#18
Cloudflare Bot Management
Security
705.8k sites
#19
reCAPTCHA
Security
700.7k sites
#20
Contact Form 7
WordPress plugins
644.4k sites
Ranked by live sites · click any card to open its report
20.4M
sites analyzed
4,873
technologies tracked
104
categories
Daily
data refresh

Trending technologies

The fastest movers across the web this month.

Trending up

Biggest monthly adoption gains.

See all trending →

Trending down

Largest monthly losses in share.

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Browse by category

All 104 categories
Ecommerce
WooCommerce
724 appsWo
CMS
WordPress
479 appsWo
Marketing automation
MailChimp
467 appsMa
Analytics
Google Analytics
386 appsGa
Live chat
Joinchat
336 appsJo
CRM
Salesforce
239 appsSa
JavaScript libraries
jQuery
227 appsJq
Advertising
Google AdSense
208 appsGa
For everyone building on the web

The data behind every product decision.

Sales

Prospect with intent.

Find every site running Shopify, HubSpot, Salesforce — segment by industry, country, traffic.

Build a list →
Research

Track the stack.

Watch adoption curves of frameworks, CMS and SaaS — by week, by region, by competitor.

Explore the registry →
Recruiting

Find the team.

Identify companies using your skill stack. React + Stripe + Postgres = a warm intro.

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Website technology checker

What is a website technology checker?

A website technology checker inspects a site's pages, response headers and scripts to reveal the technologies it runs — its CMS, JavaScript frameworks, analytics, hosting, CDN and payment providers. LargerIO is a free website technology checker: enter any public domain and get a complete, categorised breakdown of its tech stack in seconds, backed by adoption data from millions of sites.

How it works

  1. 1
    Enter a domain

    Type any website address — like stripe.com — into the lookup field. No sign-up needed to run a check.

  2. 2
    We analyse the site

    LargerIO resolves the domain and inspects its pages, headers and scripts to fingerprint the technologies it runs.

  3. 3
    Read the tech stack

    Get a full profile in seconds — every detected technology, grouped by category, with adoption data across the web.

What technologies can it detect?

LargerIO detects thousands of technologies across dozens of categories, including:

  • · Content management systems
  • · Ecommerce & payments
  • · JavaScript frameworks
  • · Analytics & tag managers
  • · CDNs & hosting
  • · Web servers & languages

Browse the full technology registry, explore every category, or see what's trending across the web.

Frequently asked questions

What is a website technology checker?
A website technology checker inspects a site's pages, headers and scripts to reveal the technologies it runs — its CMS, JavaScript frameworks, analytics, hosting, CDN, payment providers and more. LargerIO checks any public website and returns a full technology profile in seconds.
How do I check the technologies a website uses?
Enter any domain (for example stripe.com) in the lookup field above. LargerIO resolves the site, analyses its responses and lists every detected technology, grouped by category, with adoption data across the web.
Is the website technology checker free?
Yes. You can run lookups for free, with no account required to get started. Free API access and an MCP server are also available for developers who want to automate checks.
What technologies can LargerIO detect?
LargerIO detects thousands of technologies across dozens of categories, including content management systems, ecommerce platforms, web frameworks, analytics and tag managers, CDNs, hosting providers, and payment processors.
Start for free

No card. No limits for getting started.

Lookup any site from the browser, your IDE or a script. Upgrade only when you grow.

Create your free account See pricing →
  • 25lookups / day on the web — anonymous
  • 1,000API calls / month — free tier
  • ∞MCP server — bring it into Claude or Cursor
  • —No credit card. Cancel anytime.