DCbrain is a Big Data solution dedicated to exploitation and maintenance issues of complex industrial networks (such as gas, water, electricity, logistic,…). We are now used by actors such as ENEDIS, Total, GRDF or SNCF. Our software is based on graph database models and machine learning tools that can transform raw IoT data into an “internet of streams”. Our approach is to create a digital version of any complex network; through this digital network users can visualise flows, identify anomalies, predict incidents and test the evolution of networks (new clients, volume increases, incidents, etc.). Our solution has a direct impact on exploitation processes and costs, including maintenance and operational costs, engineering costs and energy efficiency.