Our software


Stardog is a semantic graph database: fast, lightweight, pure Java for mission-critical, enterprise apps.


Pelorus is a faceted navigation tool for browsing, searching, and discovering information in complex, large data sets. Check out the cool demo.


Pellet is the leading open source OWL 2 reasoner. Check out the source, docs, and more at Github.


Spanner is an adjunct to Stardog that extracts structured information from documents, using NLP and machine learning.

is used by the world's best companies.

We make complex possible.