There is a growing demand for a single European data market economy. But there is also a missing link between Europe’s data spaces and marketplaces. Despite attempts on Big Data management and sharing, there is not yet a broadly accepted, trusted and secure solution for bringing together data marketplaces, . The EU-funded i3-MARKET project address this gap by providing technologies as open source software support tools for secure and reliable data-driven collaboration of existing and new future marketplace forums, the project tools enhance interoperability across different data spaces and marketplaces, which is currently lacking. Special attention is focus on industrial data, particularly sensitive commercial data assets from SMEs and large industrial corporations. www.i3-market.eu