OrientDB vs RethinkDB: What are the differences?

OrientDB: An open source NoSQL database management system. It is an open source NoSQL database management system written in Java. It is a Multi-model database, supporting graph, document, key/value, and object models, but the relationships are managed as in graph databases with direct connections between records; RethinkDB: JSON. Scales to multiple machines with very little effort. Open source. RethinkDB is built to store JSON documents, and scale to multiple machines with very little effort. It has a pleasant query language that supports really useful queries like table joins and group by, and is easy to setup and learn.

OrientDB and RethinkDB can be primarily classified as "Databases" tools.

RethinkDB is an open source tool with 22.5K GitHub stars and 1.75K GitHub forks. Here's a link to RethinkDB's open source repository on GitHub.

miDrive, Runbook, and Rove.me are some of the popular companies that use RethinkDB, whereas OrientDB is used by Acadar, Bright Power, and GittiGidiyor. RethinkDB has a broader approval, being mentioned in 53 company stacks & 166 developers stacks; compared to OrientDB, which is listed in 10 company stacks and 5 developer stacks.