Allegiance
3 websites

Allegiance costs money

http://www.allegiance.com/

Allegiance offers Voice of the Customer (VoC) / Customer Experience (CX) solutions to help you manage and improve the customer experience

VS

Facebook Comments
333,844 websites

Facebook Comments is free to use

http://developers.facebook.com/docs/plugins/

Facebook's Comments box lets people comment on content on your site using their Facebook profile and shows this activity to their friends in news feed. It also contains built-in moderation tools and special social relevance ranking.

Market Share by Top Websites

1 Facebook Comments is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Allegiance is clearly lagging behind, losing to Facebook Comments in all segments.

Websites Categories

1 Facebook Comments has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, News & Media, Science & Education and 20 other categories.

2 Allegiance hasn't got a lead over Facebook Comments in any websites category.

Geography

1 Facebook Comments is leading in most countries, including United States, Russia, Vietnam, Brazil and 162 other countries.

2 Allegiance hasn't got a lead over Facebook Comments in any country.