Yammer

other

Yammer is an enterprise social network service that was launched in September 2008. Unlike Twitter, which is used for broadcasting messages to the public, Yammer is used for private communication within organizations or between organizational members and pre-designated groups, making it an example of enterprise social software. Yammer originally launched as an enterprise microblogging service and has evolved to become a fully-fledged enterprise social network. Access to a Yammer network is determined by a user's Internet domain, so only those with appropriate email addresses may join their respective networks. According to TechCrunch in September 2010, the service is being used by more than one million users and 80,000 companies worldwide, including 80% of the Fortune 500. In a late April 2010 interview, Yammer CEO David Sacks said that Yammer revenue was doubling every quarter, but would not disclose 2009 revenue beyond describing it as "seven figures". Sacks also said that 70% of Fortune 500 companies were using Yammer at that time. Read more