Apache Rya
6.0#16 in rdf databasesFree planFree planWebAPISelf-hosted
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Rya suits teams managing large, distributed RDF datasets that need SPARQL, reasoning, and multiple RDF formats. It also fits projects using Accumulo or MongoDB backends.
RDFox may suit teams building RDF knowledge-graph systems that need rule-based reasoning, APIs, or deployment across different environments. Its evaluation license is limited to evaluation and non-commercial use.