Here's a comparison between RethinkDB and MongoDB (written by RethinkDB) http://rethinkdb.com/docs/rethinkdb-vs-mongodb/ http://rethinkdb.com/docs/rethinkdb-vs-

Here's a comparison between RethinkDB and MongoDB (written by RethinkDB) http://rethinkdb.com/docs/rethinkdb-vs-mongodb/ http://rethinkdb.com/docs/rethinkdb-vs-mongodb/ and the FAQ for "When is RethinkDB not a good choice": http://rethinkdb.com/faq/#when-is-rethinkdb-not-a-good-choice http://rethinkdb.com/faq/#when-is-rethinkdb-not-a-good-choic... A lot of the things would also apply to PostgreSQL