OrientDB is an open source multi-model NoSQL database management system. It is a distributed database written in Java, and is considered a NoSQL document-graph hybrid database. OrientDB combines the power of a document database, with the scalability of a graph database, making it a highly performant and flexible choice for a variety of applications. OrientDB can handle data in different formats including documents, key-values, graphs, and objects, allowing for a flexible data model that can be adapted to fit any use case. It also supports full-text search, geospatial queries, and multi-master replication for high availability. OrientDB is optimized for high performance, scalability, and availability, and is suitable for any size of application, from startups to enterprise systems.
FleetDB suspension is no longer active: https://github.com/mmcgrana/fleetdb