Cupboard is an embedded database library for Clojure, intended to make writing Clojure objects to disk, and retrieving them, a relatively simple task. Cupboard is almost completely schemaless, supports unique and non-unique indices, querying by one or more indices, and ACID transactional semantics.

At its lowest level, Cupboard uses Berkeley DB JE, and contains a fairly complete Clojure wrapper for the JE API.