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 In terms of market share, Rack Cache is clearly lagging behind, losing to mod_pagespeed in all segments.

Websites Categories

1 mod_pagespeed has better usage coverage in more websites categories. Including Computers Electronics & Technology, Science & Education, Health, Arts & Entertainment and 17 other categories.

2 Rack Cache is leading in Business & Consumer Services, Jobs & Career and Gambling.


1 mod_pagespeed is leading in most countries, including United States, Poland, Japan, Germany and 144 other countries.

2 Rack Cache is leading in Sweden, Taiwan, Puerto Rico, Cameroon and 8 other countries.