AddThis was a free social bookmarking service that could be integrated into a website with the use of a web widget.

[13] In September, the company hired a new CEO, Ramsey McGrory, formerly of RightMedia and Yahoo!, with co-founder Radfar becoming executive chairman.

[20] In March 2014, the company was named number one on the Top 30 Syndicated Ad Focus Entities by comScore.

[22] The company was the subject of a lawsuit by Rembrandt Social Media, which also sued Facebook, for the use of patents that were first implemented in Surfbook and belonging to deceased Dutch programmer Joannes Jozef Everardus van Der Meer that involve the "Like" button.

[23] In July 2014, ProPublica exposed AddThis for uniquely identifying and tracking users using a controversial technique called canvas fingerprinting.