In addition to the member organizations of the DDI Alliance, DDI collaborates with other organizations to achieve common objectives. Partners include:


In 2020, CODATA, the Committee on Data of the International Science Council, and the DDI Alliance signed a letter of collaboration.


In 2021, the DDI Scientific Board approved the establishment of a "simple liaison" relationship with the World Wide Web Consortium (W3C) to coordinate activities in the field of data description, especially around specification development.   


The DDI Alliance is a category A liaison with the International Organization for Standardization ISO/TC 46/SC 4 Technical interoperability committee. Category A liaisons are “Organizations that make an effective contribution to the work of the technical committee or subcommittee for questions dealt with by this technical committee or subcommittee."