⚡ Legacy Technologies

Legacy technologies are platforms and tools that have been discontinued or shut down and no longer operate. Some are completely defunct, while others remain functional but unsupported.

According to our data, legacy technologies are detected on 24.4% of all websites.
73.3% of these sites use only one legacy technology, 20.5% use two, and 6.3% use three or more of them.

Statistics based on 3.6M+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the leading legacy technologies in 2026, based on market share.

The most popular is Owl Carousel with a share of 28.7%, followed by Magnific Popup with 19.8% and Google URL Shortener with 11.2%.

Owl Carousel 28.7%
Magnific Popup 19.8%
Google URL Shortener 11.2%
jQuery Cookie 10.2%
jQuery Mousewheel 9.7%
Moment.js 6.8%
Adobe Flash 3.5%
Facebook Like 3.4%
ASP 3%
AddThis 2.9%
iLightBox 2.6%
Polymer 2.3%
Skrollr 2.2%
Picturefill 2%
CentOS 1.9%

You can also drill down by country:

🚀 Country Highlights

Here is a list of technologies that are especially popular in certain countries.
Differences between global and country rankings are shown in parentheses.

jQuery Cookie is #1 in Japan ^(-3)
Skype is #1 in Thailand ^(-18)
Magnific Popup is #1 in Austria ^(-1)
ASP is #2 in China ^(-7)
Messenger Customer Chat is #2 in Vietnam ^(-15)
Google URL Shortener is #2 in Taiwan ^(-1)
jQuery Mousewheel is #3 in Germany ^(-2)
iLightBox is #4 in Iran ^(-7)
Moment.js is #4 in Colombia ^(-2)
AngularJS is #5 in Denmark ^(-13)

✨ Best Legacy Technologies

Below is a more detailed list of the top 25 of the 126 legacy technologies we detect, ranked by their market share.

Rank	Name	Market share
1	Owl Carousel Germany A deprecated open-source jQuery plugin for creating responsive, touch-enabled, and accessible carousel sliders. FreeOpen sourceLegacy	28.7%
2	Magnific Popup Kyiv, Ukraine A responsive lightbox and dialog plugin for jQuery and Zepto.js. FreeOpen sourceLegacy	19.8%
3	Google URL Shortener Mountain View, California, United States A deprecated link service from Google. Legacy	11.2%
4	jQuery Cookie Germany A deprecated jQuery plugin for reading, writing and deleting cookies. FreeOpen sourceLegacy	10.2%
5	jQuery Mousewheel San Francisco, California, United States A jQuery plugin that adds cross-browser mouse wheel support with delta normalization. FreeOpen sourceLegacy	9.7%
6	Moment.js San Francisco, California, United States An open-source JavaScript library for parsing, validating, manipulating, and formatting dates. FreeOpen sourceLegacy	6.8%
7	Adobe Flash San Jose, California, United States A discontinued multimedia software platform for creating animations and interactive apps. Legacy	3.5%
8	Facebook Like Menlo Park, California, United States A social plugin that allowed websites to embed a button for visitors to like and share web pages on Facebook. Legacy	3.4%
9	ASP Redmond, Washington, United States A server-side scripting language and dynamic web page engine. FreeLegacy	3%
10	AddThis Austin, Texas, United States A social bookmarking service that discontinued its services on May 31, 2023. FreeLegacy	2.9%
11	iLightBox A commercial jQuery lightbox plugin. $16+Legacy	2.6%
12	Polymer Mountain View, California, United States A legacy open-source JavaScript library created by Google for building components based on Web Components standards. FreeOpen sourceLegacy	2.3%
13	Skrollr Standalone parallax scrolling JavaScript library for mobile (Android, iOS) and desktop in about 12k minified. FreeOpen sourceLegacy	2.2%
14	Picturefill Boston, Massachusetts, United States A responsive image polyfill for <picture>, srcset, sizes, and more. FreeOpen sourceLegacy	2%
15	CentOS Raleigh, North Carolina, United States A discontinued open-source Linux distribution compatible with RHEL. Legacy	1.9%
16	jQuery LazyLoad Finland A deprecated jQuery lazy loading plugin. FreeOpen sourceLegacy	1.8%
17	Messenger Customer Chat Menlo Park, California, United States The website chat widget from Meta that was retired in May 2024. Legacy	1.8%
18	AngularJS Mountain View, California, United States A discontinued open-source web framework from Google that has been superseded by Angular. FreeOpen sourceLegacy	1.5%
19	Skype Redmond, Washington, United States A communications platform for voice and video calls and sending instant messages that was retired on May 5, 2025 in favor of Microsoft Teams. Free$$$Legacy	1.5%
20	Google Webmaster Tools Mountain View, California, United States The old Google Webmaster Tools, detected by the meta name "verify-v1", which have been deprecated in favor of Google Search Console. FreeLegacy	1.4%
21	Google Funding Choices Mountain View, California, United States A messaging tool for GDPR and CCPA compliance and ad blocking recovery. Legacy	1.2%
22	SWFObject A deprecated framework for detecting the Adobe Flash Player plugin and embedding Flash files. FreeOpen sourceLegacy	1.2%
23	Microsoft Invest Redmond, Washington, United States A demand-side ad management platform created after Microsoft's acquisition of Xandr to facilitate programmatic media buying. Legacy	1%
24	Google Optimize Mountain View, California, United States A free website optimization tool integrated with Google Ads that enabled A/B, multivariate, and redirect landing page testing. Legacy	0.9%
25	Facebook Like Box Menlo Park, California, United States A plugin that allowed admins to promote their Facebook Pages and embed a simple feed of content from a Page into other sites. Legacy	0.9%

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 3,655,631 websites.
We currently track the presence of 126 legacy technologies across the web.
Statistics were last calculated on August 20, 2026.
For more details, see our methodology and disclaimer.