The Vertabelo journey continues … We now have almost 10,000 users and the number of Vertabelo advocates keeps growing strong. Vertabelo users come from over 100 countries and speak various languages. What unites them? The relational database. Let’s see what relational databases they use: We wanted to determine the most popular database engine among Vertabelo users based on one of three widely-used operating systems: Windows, Linux, Mac OS.