Best RDF Databases in 2026
Updated
In short: Eclipse RDF4J is ranked #1 of 26 as of 8 October 2026, ahead of Fluree DB and GraphDB. The best-ranked option with a free plan is Fluree DB.
RDF databases are for storing and working with data represented as linked statements. Compared on SPARQL support, supported RDF formats, federated queries, and reasoning support, these entries also show whether they support RDF-star. Deployment options and the free-plan and paid-from fields add practical points to weigh against your infrastructure and budget. Apache Jena Fuseki, Eclipse RDF4J, and Fluree DB are among the named options, alongside GraphDB, RDFox, Stardog, Tentris, and AllegroGraph. Compare the capabilities against the data formats, query patterns, and deployment approach your application needs.
26 RDF databases ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
13 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | Eclipse RDF4JWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 2 | Fluree DBWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 3 | GraphDBWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 4 | QLeverWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 5 | RDFoxWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 6 | StardogWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 7 | TentrisWeb · Mac · Linux · Self-hosted | Three bars | — | 3 of 6 | Free | 6.6 | |
| 8 | Apache Jena FusekiWeb · Windows · Linux · Self-hosted · API | Three bars | — | 3 of 6 | Free | 6.5 | |
| 9 | ParliamentWindows · Mac · Linux · Self-hosted | Three bars | — | 3 of 6 | Free | 6.5 | |
| 10 | RedStoreMac · Linux · Self-hosted · API | Two bars | — | 2 of 6 | Free | 6.5 | |
| 11 | AllegroGraphWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | Free | 6.4 | |
| 12 | Apache RyaWeb · Self-hosted · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 13 | DydraWeb · Self-hosted · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 14 | BrightstarDBWindows · Mac · Linux · Android · iPhone · Self-hosted · API | Two bars | — | — | 5 of 6 | — | 5.7 |
| 15 | CoreseWeb · Windows · Mac · Linux · Self-hosted · API | Two bars | — | — | 4 of 6 | — | 5.7 |
| 16 | MulgaraWeb · Windows · Mac · Linux · Self-hosted · API | Two bars | — | — | 4 of 6 | — | 5.7 |
| 17 | qEndpointWeb · Windows · Mac · Linux · Self-hosted · API | Two bars | — | — | 4 of 6 | — | 5.6 |
| 18 | sparqWindows · Mac · Linux · Self-hosted · API | Two bars | — | — | 3 of 6 | — | 5.6 |
| 19 | Virtuoso Universal ServerWeb · Windows · Mac · Linux · Self-hosted · API | Two bars | — | — | 4 of 6 | — | 5.6 |
| 20 | eccenca Corporate MemoryWeb · Linux · Self-hosted · API | One bar | — | — | 2 of 6 | — | 5.5 |
| 21 | StrabonWindows · Linux · Self-hosted | One bar | — | — | 2 of 6 | — | 5.5 |
| 22 | TriplyDBWeb · Self-hosted · API | One bar | — | — | 1 of 6 | — | 5.5 |
| 23 | HalyardWeb · Mac · Linux · Self-hosted · API | One bar | — | — | 3 of 6 | — | 5.3 |
| 24 | TrigoWeb | One bar | — | — | 1 of 6 | — | 5.3 |
| 25 | gStoreLinux · Self-hosted · API | No signal | — | — | 1 of 6 | — | 5.2 |
Compare all 25 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Deployment options | SPARQL support |
|---|---|---|---|---|---|---|---|---|
| 1 | Eclipse RDF4J | 6.6 | Free plan | Free | — | — | self-hosted | sparql 1.2 |
| 2 | Fluree DB | 6.6 | Free plan | Free | Yes | — | — | sparql 1.1 |
| 3 | GraphDB | 6.6 | Free plan | Free | Yes | — | hybrid | sparql 1.1 |
| 4 | QLever | 6.6 | Free plan | Free | — | — | self-hosted | sparql 1.1 |
| 5 | RDFox | 6.6 | Free plan | Free | No | — | — | — |
| 6 | Stardog | 6.6 | Free plan | Free | Yes | — | — | — |
| 7 | Tentris | 6.6 | Free plan | Free | Yes | — | self-hosted | sparql 1.1 |
| 8 | Apache Jena Fuseki | 6.5 | Free plan | Free | — | — | self-hosted | sparql 1.1 |
| 9 | Parliament | 6.5 | Free plan | Free | — | — | self-hosted | — |
| 10 | RedStore | 6.5 | Free plan | Free | Yes | — | self-hosted | sparql 1.1 |
| 11 | AllegroGraph | 6.4 | Free plan | Free | Yes | — | — | — |
| 12 | Apache Rya | 6.4 | Free plan | Free | Yes | — | hybrid | — |
| 13 | Dydra | 6.4 | Free plan | Free | Yes | — | cloud | sparql 1.1 |
| 14 | BrightstarDB | 5.7 | No | — | Yes | — | self-hosted | sparql 1.1 |
| 15 | Corese | 5.7 | No | — | Yes | — | self-hosted | sparql 1.1 |
| 16 | Mulgara | 5.7 | No | — | — | — | self-hosted | — |
| 17 | qEndpoint | 5.6 | No | — | — | — | self-hosted | sparql 1.1 |
| 18 | sparq | 5.6 | No | — | — | — | self-hosted | sparql 1.2 |
| 19 | Virtuoso Universal Server | 5.6 | No | — | — | — | — | — |
| 20 | eccenca Corporate Memory | 5.5 | No | — | — | — | hybrid | sparql 1.1 |
| 21 | Strabon | 5.5 | No | — | Yes | — | self-hosted | sparql 1.1 |
| 22 | TriplyDB | 5.5 | No | — | Yes | — | hybrid | sparql 1.1 |
| 23 | Halyard | 5.3 | No | — | — | — | hybrid | sparql 1.1 |
| 24 | Trigo | 5.3 | No | — | — | — | self-hosted | sparql 1.1 |
| 25 | gStore | 5.2 | No | — | — | — | self-hosted | sparql 1.1 |
Is your app on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which RDF database is ranked first on Freedom251?
Eclipse RDF4J is ranked #1 of 26 with a score of 6.6. Fluree DB is second and GraphDB third.
How many of these have a free plan?
13 of the 25 on this page publish a free plan on their own pricing pages.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.