BigIP
64,825 websites

BigIP costs money

http://www.f5.com/products/big-ip/

The BIG-IP product suite is a system of application delivery services that work together on the same best-in-class hardware platform or software virtual instance. From load balancing and service offloading to acceleration and security, the ...

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Phusion Passenger
80,695 websites

Phusion Passenger offers both free and paid options

https://www.phusionpassenger.com

Phusion Passenger - a.k.a. mod_rails or mod_rack - is a web server and application server, designed to be fast, robust and lightweight. Administration tools allow you to gain insight into web application operations and server performance.

Market Share by Top Websites

1 Phusion Passenger is leading in The Entire Web.

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

Websites Categories

1 BigIP has better usage coverage in more websites categories. Including Science & Education, Finance, Computers Electronics & Technology, Law & Government and 10 other categories.

2 Phusion Passenger is leading in Games, Arts & Entertainment, Sports, Community & Society and 6 other categories.

Geography

1 Phusion Passenger is leading in most countries, including United States, Canada, United Kingdom, Germany and 111 other countries.

2 BigIP is leading in Japan, China, France, Italy and 45 other countries.