Semantic Graphs & RDF Databases
A hand-picked directory of triple stores, RDF databases, and semantic graph platforms — the engines behind subject–predicate–object modeling, SPARQL querying, and enterprise-scale knowledge graphs.
Platform Directory
14 semantic graph and RDF database platforms, renumbered sequentially after removing the one dead link.
AllegroGraph
A horizontally distributed, multi-model (document and graph) entity-event knowledge graph technology.
Visit site → 02Apache Jena
A Java framework for building Semantic Web and Linked Data applications.
Visit site → 03Ontotext GraphDB
Links diverse data, indexes it for semantic search, and enriches it via text analysis to build big knowledge graphs.
Visit site → 04MarkLogic Server
Combines the benefits of a document store and an RDF triple store, where semantic data is stored natively. Now part of Progress Software.
Visit site → 05Stardog
Unifies data based on its meaning, creating a connected network of knowledge to power your business.
Visit site → 06Virtuoso Universal Server
A core SQL & SPARQL engine that powers many enterprise knowledge graph initiatives.
Visit site → 07PoolParty Semantic Suite
Helps organizations build and manage enterprise knowledge graphs as a basis for their AI strategy.
Visit site → 08Amazon Neptune
A fast, reliable graph database built for the cloud, supporting both property graph and RDF/SPARQL models.
Visit site → 09Dgraph
A native GraphQL graph database built to be distributed — highly scalable, performant, and fast.
Visit site → 10RDFox
A high-performance knowledge graph and semantic reasoning engine from Oxford Semantic Technologies.
Visit site → 11BrightstarDB
A native RDF database built for the .NET platform.
Visit site → 12Blazegraph
An ultra high-performance graph database supporting Blueprints and RDF/SPARQL APIs.
Visit site → 13Apache Giraph
An iterative graph processing system built for high scalability. Retired as an active Apache project, but its documentation and site remain fully accessible.
Visit site → 14Fluree
An open-source semantic graph database that guarantees data integrity, facilitates secure data sharing, and powers connected data insights.
Visit site →