FriendFeed
53 websites

FriendFeed is free to use

http://friendfeed.com

FriendFeed aims to be a one stop shop for all your social networking updates and news items. The four founders were all team members at Google and helped to launch such products as Google Maps, Adsense, GMail and Google Groups. They've br...

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Optify
42 websites

Optify offers both free and paid options

http://www.optify.net/

Optify provides an indispensable demand generation solution for sophisticated B2B marketers. Optify helps you generate more high quality inbound leads, nurture more demand from your existing leads, and track the impact of all of your market...

Market Share by Top Websites

2 In terms of market share, FriendFeed is clearly lagging behind, losing to Optify in all segments.

Websites Categories

1 Optify has better usage coverage in more websites categories. Including E-commerce & Shopping, Health, Heavy Industry & Engineering, Home & Garden and 4 other categories.

2 FriendFeed is leading in Science & Education, Law & Government, Computers Electronics & Technology, Community & Society and 2 other categories.

Geography

1 FriendFeed is leading in most countries, including Russia, Greece, Italy, Turkey and 10 other countries.

2 Optify is leading in United States, Canada, Serbia, Bangladesh and 7 other countries.