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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WHMCS
2,894 websites

WHMCS offers both free and paid options

http://whmcs.com/

WHMCS is an all-in-one Content Management System including a client management, billing & support solution for online businesses and web hosts.

Market Share by Top Websites

1 WHMCS is leading in Top 1M Sites and The Entire Web.

2 IBM Websphere Portal Server is leading in Top 100K Sites.

Websites Categories

1 IBM Websphere Portal Server has better usage coverage in more websites categories. Including Finance, Law & Government, Science & Education, Business & Consumer Services and 13 other categories.

2 WHMCS is leading in Computers Electronics & Technology, Games, Community & Society, Adult and 2 other categories.

Geography

1 WHMCS is leading in most countries, including United States, India, Iran, Brazil and 112 other countries.

2 IBM Websphere Portal Server is leading in China, Japan, South Korea, Croatia and 3 other countries.