TerminusDB - Dublin, Ireland

TerminusDB is an open-source, full-featured, in-memory graph database management system with the powerful WOQL query language. It offers the complete suite of revision control features, including branch, merge, squash, rollback, blame, and time-travel, allowing for serious data structuring that meets business needs and minimizes the code required to display, distribute, and manipulate data to support great decision-making. TerminusDB was founded in Dublin, Ireland, and was previously known as DataChemist.