The 2025 Open Data Maturity (ODM) assessment has been published, providing the latest overview of how European countries are advancing in making public sector information more accessible, reusable and impactful. This 11th edition assesses 36 countries, including all 27 EU Member States, three members of the European Free Trade Association and six candidate countries. The ODM continues to serve as an essential reference for tracking progress, identifying emerging trends and supporting peer learning across Europe. 

The open data maturity (ODM) assessment is an annual exercise conducted to measure the progress of European countries in promoting and facilitating the availability and reuse of public sector information. The assessment methodology evaluates developments in open data initiatives across four thematic dimensions: policy, portal, quality and impact. Maturity in these four dimensions is aggregated into an overall score that shows a country’s open data maturity.

The purpose of the Open Data Maturity assessment is to evaluate the development of countries in making public sector information available and stimulating its reuse. The landscaping exercise offers a benchmarking and learning tool for use at both the national and European levels. The results of the assessment support countries in better understanding their relative level of maturity compared with other countries. The results also capture year-on-year developments in countries’ ODM and help in identifying areas for improvement. Furthermore, the exercise also results in evidence-based recommendations on the activities that European countries could adopt to increase their ODM.