EOPEN (https://eopen-project.eu/) is a project which has received funding from the European Union’s Horizon 2020 research and innovation programme under the topic EO Big Data Shift in 2017 and has a duration of 3 years, starting from November 2017. In this work, we present the concept of the project, its objectives and the lessons learnt after almost one year of project lifetime, as a follow-up to our previous project presentation at ESA BiDS’17 in Toulouse, France.