The study researches the value created by open data in Europe. It is the second study by the European Data Portal, following the 2015 report. The open data market size is estimated at €184 billion and forecast to reach between €199.51 and €334.21 billion in 2025. The report additionally considers how this market size is distributed along different sectors and how many people are employed due to open data. The efficiency gains from open data, such as potential lives saved, time saved, environmental benefits, and improvement of language services, as well as associated potential costs savings are explored and quantified where possible. Finally, the report also considers examples and insights from open data re-use in organisations.