Launching Next has discovered 3 share button startups.
Shareaholic Ñ Share buttons, related content, website analytics
Drive pageviews to your website with Shareaholic's industry leading share buttons, related content plugins, analytics, and browser extensions.
ShareThis - Share Buttons, Share Plugin, Share Analytics, Media Solutions
Put sharing to work with innovative sharing tools. Turn sharing behavior into value with share buttons, plugins and analytics for publishers, and media solutions for advertisers.