AddThis is a privately held company founded in 2004. It is an industry leader in the field of website marketing tools. It works on an artificial platform known as the AddThisAudience Intelligence platform. It offers a wide range of share buttons such as share buttons and follow buttons.
Its share buttons include a floating share bar, inline share buttons, extending share buttons and a share button popup. Its follow buttons are available for free and can be customized and used for analytics as well. AddThis also provides a link promotion popup and slider along with a list building popup and slider. It is available as a CMS plugin for popular platforms like WordPress.