RethinkDB

RethinkDB is an open-source scalable database that makes building modern, realtime apps dramatically easier. It does this by exposing a new database access model that pushes updated query results to applications in realtime. With RethinkDB, developers can get a scalable realtime web app running in a fraction of the time, with fewer engineering resources. Founded in 2010, RethinkDB is headquartered in Mountain View, California.