Ext JS
23,669 websites

Ext JS offers both free and paid options

https://www.sencha.com/products/extjs/#overview

Ext JS is a cross-browser JavaScript library for building rich internet applications.

VS

SocketIO
21,541 websites

SocketIO is free to use

http://socket.io/

Socket.IO aims to make realtime apps possible in every browser and mobile device, blurring the differences between the different transport mechanisms. It's care-free realtime 100% in JavaScript.

Market Share by Top Websites

1 Ext JS is leading in The Entire Web.

2 SocketIO is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.

Websites Categories

1 Ext JS has better usage coverage in more websites categories. Including Science & Education, Law & Government, News & Media, Health and 11 other categories.

2 SocketIO is leading in Adult, Computers Electronics & Technology, Finance, Games and 5 other categories.

Geography

1 SocketIO is leading in most countries, including Poland, India, Brazil, Canada and 72 other countries.

2 Ext JS is leading in China, United States, Russia, South Korea and 66 other countries.