Couchbase
Couchbase Server, originally known as Membase, is an open-source, distributed multi-model NoSQL document-oriented database software package optimized for interactive applications. These applications may serve many concurrent users by creating, storing, manipulating and presenting data. Couchbase is a public software company that develops and provides commercial packages and support for Couchbase Server and Couchbase Lite.
We don't have data on Couchbase yet, but we are working on it.