Market Share by Top Websites

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

2 Despite its recent growth, Rack Cache is still behind mod_pagespeed in all market share segments.

Websites Categories

1 mod_pagespeed has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, Shopping, Internet & Telecom and 226 other categories.

2 Rack Cache is leading in Senior Health, Baseball, Basketball, Volleyball and 3 other categories.


1 mod_pagespeed is leading in most countries, including United States, Japan, United Kingdom, Germany and 189 other countries.

2 Rack Cache is leading in Russia, Belarus, El Salvador, Swaziland and 7 other countries.