Clearspring

AddThis was a free social bookmarking service that could be integrated into a website with the use of a web widget. Once the widget was added, visitors of a website using the service could bookmark or share an item using a variety of services, such as Facebook, MySpace, Pinterest, and Twitter. AddThis collected users' behavioural data, even if they do not share anything. The site reached 1.9 billion unique visitors monthly and was used by more than 15 million web publishers. The service operated under companies including AddThis, Inc., AddThis, LLC, and Clearspring Technologies, Inc. until the company's acquisition by Oracle Corporation on January 5, 2016. AddThis would continue to run until all services were terminated on May 31, 2023.

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