The SEADDA COST Action is vital for establishing a priority research area in the archiving, dissemination and open access re-use of archaeological data. It was approved in 2018, and currently has over 100 members representing 31 COST countries and four international partner countries. It is an interdisciplinary network of archaeologists and computer scientists; experts in archaeological data management and open data dissemination and re-use. It includes four working groups in which participants from countries with archiving expertise work with participants with few or no available options, so they could share knowledge and create dialogue within and between their countries, and move forward together. Its main objective is to mitigate the loss of primary archaeological data by developing common understandings around the stewardship of digital archaeological data, building new best-practice networks to support the preservation and open dissemination of archaeological data, and the creation of more inclusive research partnerships.