IBM Websphere Portal Server
1,187 websites

IBM Websphere Portal Server costs money

http://www-03.ibm.com/software/products/en/portalserver

IBM WebSphere Portal Server is the foundation offering of the WebSphere Portal product family, with enterprise portal capabilities that enable consolidation of applications and content into role-based applications, complete with search, per...

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Kentico
10,715 websites

Kentico offers both free and paid options

http://www.kentico.com/

Kentico CMS for ASP.NET gives marketers and developers the ability to create websites. A solution for website, store, community and on-line marketing initiatives.

Market Share by Top Websites

1 Kentico is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, IBM Websphere Portal Server is clearly lagging behind, losing to Kentico in all segments.

Websites Categories

1 Kentico has better usage coverage in more websites categories. Including Business & Consumer Services, Finance, Health, Science & Education and 20 other categories.

2 IBM Websphere Portal Server hasn't got a lead over Kentico in any websites category.

Geography

1 Kentico is leading in most countries, including United States, Canada, Australia, United Kingdom and 114 other countries.

2 IBM Websphere Portal Server is leading in China, Japan, South Korea, Morocco and 4 other countries.