Sones GraphDB was a graph database developed by the German company sones GmbH, available from 2010 to 2012. Its last version was released in May 2011. sones GmbH, which was based in Erfurt and Leipzig, was declared bankrupt on January 1, 2012.
GraphDB was unique in that its design based on weighted graphs. The open source edition was released in July 2010. The commercially available enterprise version offered a wider variety of functions.
GraphDB was developed in the programming language C# and ran on Microsoft's .NET Framework and on the open source reimplementation Mono.
GraphDB was available as software as a service (SaaS) on the Microsoft cloud Azure Services Platform. GraphDB was also a component of an open source solution stack.
In 2014 the trademark "GraphDB" was acquired by Ontotext. OWLIM, Ontotext's graph database and RDF triplestore, was renamed GraphDB.