This is a comparison page between OrientDB and other DocumentDB projects . To know more about the comparison of OrientDB against GraphDBs look at this comparison.

NOTE: If any information about any product is not updated or wrong, please send an email to the committers with the link of the source of the right information. Thanks!

Feature	OrientDB	MongoDB	CouchDB
Web Site	http://www.orientdb.org	http://www.mongodb.org	http://www.couchdb.org
Supported models	[Document](http://en.wikipedia.org/wiki/Document-oriented_database) and [Graph](http://en.wikipedia.org/wiki/Graph_database)	[Document](http://en.wikipedia.org/wiki/Document-oriented_database)	[Document](http://en.wikipedia.org/wiki/Document-oriented_database)
Transactions	Yes, [ACID](http://en.wikipedia.org/wiki/ACID)	No	Yes, [ACID](http://en.wikipedia.org/wiki/ACID)
Query languages	Extended SQL, [Gremlin](https://github.com/tinkerpop/gremlin/wiki)	[Mongo Query Language](http://www.mongodb.org/display/DOCS/Querying)	[Non supported, JS API](http://sitr.us/2009/06/30/database-queries-the-couchdb-way.html)