According to the InfoWorld Test Center staff,

“Telligent Community Server has the customary blog, forum, and media-sharing social features. It stands out from the crowd with impressive scalability, business intelligence reporting, and superior integration with Microsoft's SharePoint Server, which allows users to interact with blogs and forums from within SharePoint. This, along with better overall customization via the REST API, pushes Community Server to the top of our enterprise social software list.”

Read the review by Mike Heck.