HubSpot Vex
6,055 websites

HubSpot Vex is free to use

http://github.hubspot.com/vex/

Beautiful, functional, dialogs in Javascript

VS

Kendo UI
17,542 websites

Kendo UI offers both free and paid options

http://www.telerik.com/kendo-ui

Fast, light, complete: 70+ jQuery-based UI widgets in one powerful toolset.

Market Share by Top Websites

1 Kendo UI is leading in Top 100K Sites, Top 1M Sites and The Entire Web.

2 HubSpot Vex is leading in Top 10K Sites.

Websites Categories

1 Kendo UI has better usage coverage in more websites categories. Including Science & Education, Finance, Law & Government, Computers Electronics & Technology and 19 other categories.

2 HubSpot Vex is leading in Adult.

Geography

1 Kendo UI is leading in most countries, including United States, Canada, Australia, United Kingdom and 126 other countries.

2 HubSpot Vex is leading in Brazil, Philippines, Hungary, Bolivia and 9 other countries.