Topsy
278 websites

Topsy offers both free and paid options

http://www.topsy.com

Topsy provides social media analytics software that provides Instant Social Insight to companies and organizations of all sizes. The Topsy Pro platform has indexed 2.5B (and growing) pieces of data and information. This makes Topsy one ...

VS

Vizu
15 websites

Vizu is free to use

http://www.brandlift.com

Vizu Corporation provides the first real-time, enterprise technology platform that allows advertisers and their partners in the digital media ecosystem to collaborate around optimizing Brand Lift metrics, moving their target audience throug...

Market Share by Top Websites

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

Websites Categories

1 Topsy has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, News & Media, Science & Education and 19 other categories.

2 Vizu hasn't got a lead over Topsy in any websites category.

Geography

1 Topsy is leading in most countries, including Japan, United States, Russia, Brazil and 38 other countries.

2 Vizu is leading in Romania, United Arab Emirates and Venezuela.