IBM WebSphere DataStage is an ETL tool and part of the IBM WebSphere Information Integration suite and the IBM Information Server. It uses a graphical notation to construct data integration solutions and is available in various different versions such as the Server Edition and the Enterprise Edition.

It was formerly known as Ardent DataStage followed by Ascential DataStage and in 2005 was acquired by IBM and added to the WebSphere family. The October 2006 release of DataStage has integrated it into the new IBM Information Server platform.