Blazegraph™ has been selected by the Wikimedia Foundation to be the graph database platform for the Wikidata Query Service. Read the Wikidata announcement here. Blazegraph™ was chosen over Titan, Neo4j, Graph-X, and others by Wikimedia in their evaluation. There’s a spreadsheet link in the selection message, which has quite an interesting comparison of graph database platforms.
Wikidata acts as central storage for the structured data of its Wikimedia sister projects including Wikipedia, Wikivoyage, Wikisource, and others. The Wikidata Query Service is a new capability being developed to allow users to be able to query and curate the knowledge base contained in Wikidata.
We’re super-psyched to be working with Wikidata and think it will be a great thing for Wikidata and Blazegraph™.