Technology catalogue

We observe 4,015 technologies across the top million sites, refreshed every month.

Everything else is observed only — visible and searchable, with lists and feeds not yet available. Ask and we will look at adding it.

Klaviyo

Marketing automation

lists

10,798

switches observed

27,363

domains

MailChimp

Marketing automation

lists + switches

25,307

switches observed

25,846

domains

Zendesk

Live chat

switches

4,862

switches observed

19,835

domains

HubSpot

Marketing automation

switches

8,897

switches observed

14,821

domains

Everything else we observe

Open Graph

Miscellaneous

455,603observed only

Cloudflare

CDN

442,150observed only

jQuery

JavaScript libraries

441,868observed only

Google Analytics

Analytics

411,369observed only

core-js

JavaScript libraries

332,895observed only

HTTP/3

Miscellaneous

319,907observed only

HSTS

Security

296,724observed only

PHP

Programming languages

293,027observed only

Google Font API

Font scripts

289,475observed only

Google Tag Manager

Tag managers

271,053observed only

Priority Hints

Performance

235,935observed only

Bootstrap

UI frameworks

205,975observed only

Facebook Pixel

Analytics

185,893observed only

Cloudflare Browser Insights

Analytics; RUM

165,545observed only

Cart Functionality

Ecommerce

158,463observed only

Cloudflare Bot Management

Security

157,246observed only

PWA

Miscellaneous

155,634observed only

MySQL

Databases

146,890observed only

Swiper

JavaScript libraries

142,493observed only

Nginx

Reverse proxies; Web servers

140,479observed only

Font Awesome

Font scripts

136,261observed only

Amazon Web Services

PaaS

134,005observed only

WordPress

Blogs; CMS

124,444observed only

jQuery UI

JavaScript libraries

121,728observed only

RSS

Miscellaneous

116,316observed only

jQuery Migrate

JavaScript libraries

114,043observed only

reCAPTCHA

Security

109,505observed only

cdnjs

CDN

107,000observed only

React

JavaScript frameworks

104,053observed only

Google Workspace

Email; Webmail

100,260observed only

jsDelivr

CDN

99,244observed only

Apache HTTP Server

Web servers

94,112observed only

Microsoft 365

Email; Webmail

92,475observed only

Tailwind CSS

UI frameworks

78,775observed only

Microsoft Clarity

Analytics

78,535observed only

Vue.js

JavaScript frameworks

77,775observed only

WhatsApp Business Chat

Live chat

76,554observed only

Webpack

Miscellaneous

72,172observed only

Microsoft Advertising

Advertising

67,159observed only

Yoast SEO

SEO; WordPress plugins

58,917observed only

Node.js

Programming languages

57,857observed only

Google Hosted Libraries

CDN

57,182observed only

Microsoft ASP.NET

Web frameworks

54,865observed only

Slick

JavaScript libraries

54,251observed only

LazySizes

JavaScript libraries; Performance

53,809observed only

Shopify

CMS; Ecommerce

49,506observed only

Twitter Emoji (Twemoji)

Font scripts

49,039observed only

Google AdSense

Advertising

48,369observed only

Lodash

JavaScript libraries

48,299observed only

Moment.js

JavaScript libraries

46,163observed only

Popper

Miscellaneous

45,402observed only

Sentry

Issue trackers

44,893observed only

Preact

JavaScript libraries

43,991observed only

PayPal

Payment processors

43,918observed only

OWL Carousel

JavaScript libraries

43,421observed only

TikTok Pixel

Analytics

41,945observed only

YouTube

Video players

41,476observed only

FancyBox

JavaScript libraries

40,802observed only

Amazon CloudFront

CDN

40,562observed only

GoDaddy

Hosting

40,075observed only

Showing 60 of 4,015, most-installed first.