Eclipse RDF4J vs OrientDB

Eclipse RDF4J is a modular Java framework for parsing, storing, querying, and reasoning over RDF data. It supports SPARQL 1.1 query and update, and its API can access remote RDF repositories in the same way as local ones. Supported formats include RDF/XML, Turtle, N-Triples, N-Quads, JSON-LD, TriG, and TriX. Storage options include a transactional in-memory store with optional disk persistence and a transactional Native Store aimed at medium-sized datasets around 100 million triples. Extensions add full-text search, RDFS inferencing, rule-based reasoning, SHACL and SPIN validation, and geospatial queries. The SDK bundles libraries, Server, Workbench, Console, and Javadoc API; Workbench includes a web interface with a SPARQL editor. Developers can use Maven artifacts or download an SDK zip or onejar. RDF4J is free under the Eclipse Distribution License, version 1.0. The latest stable release, 6.1.0, requires Java 25 or newer. The project describes its core databases as mainly intended for small to medium-sized datasets and notes third-party stores may scale further or offer additional features.

OrientDB is an open-source multi-model NoSQL database management system that combines graph and document data models. It supports SQL and Gremlin queries, ACID transactions, and graph algorithms. Users can work through a Graph Editor, Studio Query interface, or command-line console, and connect through native binary, HTTP REST/JSON, or Java-wrapped drivers. Listed clients and integrations include Java, JDBC, Spring Data, Node.js, PHP,.NET, Python, Go, Ruby, and Scala. OrientDB documents a multi-master distributed architecture in which each server can read and write; distributed operation requires at least 2 GB of heap, with 4 GB suggested. Transactions stay in client RAM, so their size is limited by available JVM heap. Security options include TLS 1.2 in-transit encryption and AES or DES at-rest database encryption, neither enabled by default. The documentation identifies v3.2.56 as the latest GA release. The Community distribution is free; paid support examples start at 1000 € per month.