Drupal
trend
910,465 websites

Drupal is free to use

https://drupal.org

Drupal is a free software package that allows you to easily organize, manage and publish your content, with an endless variety of customization

VS

WHMCS
trend
23,639 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 Drupal is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 Despite its recent growth, WHMCS is still behind Drupal in all market share segments.

Websites Categories

1 Drupal has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, People & Society, Marketing & Advertising and 241 other categories.

2 WHMCS is leading in Web Hosting.

Geography

1 Drupal is leading in most countries, including United States, Russia, France, United Kingdom and 215 other countries.

2 WHMCS is leading in Sao Tome.