Market Share by Top Websites

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

2 In terms of market share, Topsy is clearly lagging behind, losing to Act-On in all segments.

Websites Categories

1 Topsy has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Health, Shopping and 104 other categories.

2 Act-On is leading in Business & Industry, Computer & Electronics, Software, Marketing & Advertising and 84 other categories.


1 Act-On is leading in most countries, including United States, United Kingdom, India, Canada and 75 other countries.

2 Topsy is leading in Russia, Japan, Brazil, France and 42 other countries.