Web technology intelligence

Uncover the stack behind any website.

Analytics, CMS, frameworks, hosting, payments — detected across 20.8M domains, with the top sites rescanned every week.

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
9.9M sites
#2
PHP
Programming languages
8.9M sites
#3
HTTP/3
Miscellaneous
7.1M sites
#4
HSTS
Security
6.9M sites
#5
MySQL
Databases
6.7M sites
#6
WordPress
CMS
6.5M sites
#7
Cloudflare
CDN
5.8M sites
#8
Nginx
Web servers
5.6M sites
#9
jQuery Migrate
JavaScript libraries
4.7M sites
#10
Google Analytics
Analytics
4.4M sites
#11
Apache HTTP Server
Web servers
3.9M sites
#12
Google Tag Manager
Tag managers
2.9M sites
#13
Bootstrap
UI frameworks
2.9M sites
#14
Yoast SEO
SEO
2.4M sites
#15
Cloudflare Bot Management
Security
1.6M sites
#16
Elementor
Page builders
1.5M sites
#17
reCAPTCHA
Security
1.5M sites
#18
WordPress Block Editor
Page builders
1.5M sites
#19
Contact Form 7
WordPress plugins
1.4M sites
#20
LiteSpeed
Web servers
1.4M sites
Ranked by live sites · click any card to open its report
20.8M
sites analyzed
4,980
technologies tracked
104
categories
Weekly
rescans of the top 100k

Browse by category

All 104 categories
Ecommerce
WooCommerce
772 appsWo
Marketing automation
MailChimp
501 appsMa
CMS
WordPress
500 appsWo
Analytics
Google Analytics
407 appsGa
Live chat
Joinchat
363 appsJo
CRM
Zoho
256 appsZo
JavaScript libraries
jQuery
232 appsJq
Advertising
Google AdSense
224 appsGa
For everyone building on the web

The data behind every product decision.

Sales

Prospect with intent.

Find every Shopify store, every HubSpot user, every Salesforce shop — combine technologies, filter by language and rank.

Build a list →
Research

Track the stack.

Watch adoption curves of frameworks, CMS and SaaS — month by month, with a hosting-country breakdown for each technology.

Explore the registry →
Recruiting

Find the team.

Identify companies using your skill stack. React + Stripe = a conversation starter.

Search by stack →

More from LargerIO

speed.larger.io
Speed

Measure and compare page speed across the web.

Open →
chess.larger.io
Chess

Play chess, straight from the browser.

Open →
secret.larger.io
Secret

Share secrets that self-destruct after reading.

Open →
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. Free to get started.

Look up any site from the browser, your IDE or a script. Reports are generated for free; paid downloads open soon.

Create your free account Read the API docs →
  • 10lookups / minute on the website, no sign-up
  • 5,000REST API calls / day with a free verified account
  • 300MCP calls / hour (30 / minute) in Claude or Cursor
  • 50report generations / month on a free account