GraphDB Free edition is a fully functional member of the GraphDB family. Its only limitation is that it can handle no more than two queries in parallel. GraphDB Free is appropriate for systems that require massive volumes of data, as it applies no constraints on the volumes of loaded data. It includes all the advanced features of GraphDB that make it more than a plain RDF triplestore and put it ahead of the competition: patent-pending inference implementation, geo-spatial indices, owl:sameAs optimization for more efficient integration of linked data, comprehensive full-text-search integration and many others. GraphDB Free is a perfect starting point for smart data proof-of-concepts. Although GraphDB Free meets production deployment requirements primarily for systems with moderate load and availability requirements, if needed, it can be easily upgraded at deployment time to its unconstrained alternative GraphDB Standard. For heavy load business critical cluster deployments it can be upgraded to GraphDB Enterprise. This makes GraphDB Free an ideal choice for non-critical deployments, but also for laying the developmental foundations of smart data systems at all levels of ambition