CouchDB doesn't have a SQL like query language, and all acces is via http. Couchbase is higher performance with a binary protocol and autoscale features. So the

CouchDB doesn't have a SQL like query language, and all acces is via http. Couchbase is higher performance with a binary protocol and autoscale features. So they are very different but they have in common that you store Json and then decide how to query it later.