Clicky
37,098 websites

Clicky offers both free and paid options

http://clicky.com/

Clicky Web Analytics is simply the best way to monitor, analyze, and react to your blog or web site's traffic in real time.

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Nielsen NetRatings
52,101 websites

Nielsen NetRatings costs money

http://nielsen.com

Nielsen is a leading global provider of information and insights into what consumers watch and buy. Nielsen is a information and measurement company with leading market positions in marketing and consumer information, television and othe...

Market Share by Top Websites

1 Nielsen NetRatings is leading in Top 10K Sites, Top 100K Sites and The Entire Web.

2 Clicky is leading in Top 1M Sites.

Websites Categories

1 Nielsen NetRatings has better usage coverage in more websites categories. Including Games, Arts & Entertainment, News & Media, Sports and 9 other categories.

2 Clicky is leading in Vehicles, Computers Electronics & Technology, Health, Business & Consumer Services and 7 other categories.

Geography

1 Clicky is leading in most countries, including United States, United Kingdom, Canada, France and 95 other countries.

2 Nielsen NetRatings is leading in Italy, Australia, Philippines, Russia and 51 other countries.