Stardog is a fast, commercial RDF database: SPARQL for queries; OWL for reasoning; pure Java for the Enterprise.
The current version is 1.2.1 (02 May 2013).
Download a 30-day evaluation; or learn about the differences between Stardog Enterprise, Developer, and Community.
An active support forum and comprehensive documentation are available.
See what people are saying about Stardog.
For sales and licensing info, email or call 1-888-235-8038.