Statistical open source software for official statistics: State of play and future directions

Statistical organizations worldwide are increasingly adopting open source technologies for producing official statistics. This shift is motivated by the potential of open source tools to increase transparency, improve efficiency, and enhance reproducibility. Moreover, young professionals in statistics and data science enter the labour market with strong skills in open source tools. The adoption of open source software signifies a change in how statistical organizations operate and collaborate. This paper provides an overview of the state of open source adoption in official statistics. It details the open source movement among statistical organizations, the experiences of Statistics Netherlands with open source adoption and the creation of R-packages implementing common statistical methods. It also describes the development and use of the “awesome list of official statistics software” and discusses a set of principles for open source in official statistics, derived from best practices across various organizations. These principles have been endorsed (June 2025) by the Conference of European Statisticians (CES). Furthermore, it explores future directions for maturing this community, including metrics for assessing maturity, such as true independence of software modules, support for uncertainty propagation, and privacy by design. Moreover it presents ideas on redesigning the statistical open source landscape.