[ Many people ask us about the Freebase backend, so I asked Scott Meyer, who leads our team of graph developers, to talk a bit about “graphd”, our in-house solution. This post is long and juicy; click through the “More” tag to read it all. — Skud ]
Freebase.com is powered by a tuple store called graphd. Graphd is a C/Unix server which processes commands in a simple template-based query language.



