We build our Knowledge Graphs in Neo4j. This is a mature technology that is proven to scale indefinitely (https://neo4j.com/product/neo4j-graph-database/scalability). However, when scaling the graph, technology is not really the challenge – it’s the graph structure that determines if it will still perform well when it contains a hundred, a million or a billion nodes. At Eigen we understand how graph databases work, how to optimise queries and, most importantly, we understand the industrial domain and how to structure the data.