The Best RDF Databases in 2026
We researched RDF databases through official vendor websites, including pricing pages, plan tables, and product documentation. Rankings focus on how well each product stores and queries RDF triples or semantic graphs, value for money, and verified standards, deployment, interoperability, and reasoning features for this category.
Our top picks
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Top ranked
GraphDB#1 of 269.3/10A broad RDF platform with a free edition and enterprise-grade deployment options.
Free plan · pricing on request
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Runner-up
AllegroGraph#2 of 269.1/10A broad RDF platform for reasoning, federation, analytics, and vector-enabled knowledge graphs.
Free plan
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Top-ranked free plan
Stardog#3 of 269.0/10A broad enterprise platform for federated queries, virtual graphs, and semantic reasoning.
Free plan
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 26 tools, best first
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Best forTeams needing a polished RDF platform
A broad RDF platform with a free edition and enterprise-grade deployment options.
- RDF-star support
- Federated queries
- Reasoning support
Free plan · pricing on request Our GraphDB verdict → Visit GraphDBFor vendors Sponsor this spot · #1 · $149/mo →9.3/10★★★★★Visit GraphDB -
Best forEnterprise RDF, reasoning, and graph analytics
A broad RDF platform for reasoning, federation, analytics, and vector-enabled knowledge graphs.
9.1/10★★★★★Visit AllegroGraph -
Best forEnterprise virtual graphs and data federation
A broad enterprise platform for federated queries, virtual graphs, and semantic reasoning.
9.0/10★★★★☆Visit Stardog -
Best forModern open-source RDF with search and lineage
An open-source RDF database for governed knowledge graphs and AI data foundations.
- RDF-star support
- Federated queries
- Reasoning support
8.9/10★★★★☆Visit Fluree -
Best forRDF plus relational SQL workloads
A cross-platform choice for teams combining relational SQL with RDF and graph workloads.
Open source · 30-day trial Our OpenLink Virtuoso verdict → Visit siteFor vendors Sponsor this spot · #5 · $59/mo →8.8/10★★★★☆Visit site -
Best forDevelopers building RDF applications and services
A broad open-source Java framework for building RDF applications and services.
- RDF-star support
- Federated queries
- Reasoning support
8.6/10★★★★☆Visit Eclipse RDF4J -
Best forReliable self-hosted open-source RDF services
An open-source RDF server with broad deployment, storage, inference, and access-control options.
- RDF-star support
- Federated queries
- Reasoning support
8.5/10★★★★☆Visit Apache Jena -
Best forEnterprises needing advanced semantic reasoning
RDFox combines SPARQL querying with rule-based and ontology-driven reasoning for RDF data.
8.4/10★★★★☆Visit RDFox -
Best forFast self-hosted RDF search and spatial queries
A focused open-source choice for self-hosted RDF search and spatial querying.
- Federated queries
8.3/10★★★★☆Visit QLever -
Best forEnterprise knowledge-graph governance
A broad RDF platform for enterprises managing governed, interconnected data.
- Reasoning support
8.2/10★★★★☆Visit eccenca -
Best forSemantic-web projects needing validation and rules
A broad open-source toolkit for semantic-web teams building and validating RDF systems.
- RDF-star support
- Federated queries
- Reasoning support
8.1/10★★★★☆Visit Corese -
Best forOpen-source RDF with modern SPARQL features
A feature-rich Rust RDF engine for developers and researchers who can accept pre-1.0 maturity.
- RDF-star support
- Federated queries
- Reasoning support
8.0/10★★★★☆Visit sparq -
Best forSimple self-hosted RDF serving and ingestion
A practical self-hosted RDF database with strong SPARQL support and limited integrations.
- Federated queries
7.9/10★★★★☆Visit Tentris -
Best forSharing and publishing linked-data datasets
A flexible free service for publishing, exploring, and querying linked-data datasets.
- Reasoning support
7.8/10★★★★☆Visit TriplyDB -
Best forHorizontally scalable RDF on Hadoop or HBase
A Hadoop- and HBase-oriented RDF store for distributed semantic data workloads.
- Federated queries
7.7/10★★★★☆Visit Halyard -
Best forWikibase, GeoSPARQL, and Docker deployments
A flexible self-hosted RDF store for Wikibase, GeoSPARQL, and Docker deployments.
7.6/10★★★★☆Visit qEndpoint -
Best forTransactional Linux RDF services
A Linux-focused, transactional RDF engine for self-hosted knowledge-graph workloads.
- Reasoning support
7.5/10★★★★☆Visit gStore -
Best forScalable RDF deployments on big-data infrastructure
A self-hosted RDF store for teams building scalable SPARQL systems on big-data infrastructure.
- Reasoning support
7.4/10★★★★☆Visit Apache Rya -
Best forCloud-hosted RDF repositories with federation
A cloud RDF store with SPARQL, federation, browser tools, and a free basic plan.
- Federated queries
- Reasoning support
7.3/10★★★★☆Visit Dydra -
Best forTraditional RDF servers with SQL-source access
A self-hosted RDF server combining graph storage, querying, inference, and SQL-source access.
- Federated queries
- Reasoning support
7.2/10★★★★☆Visit Mulgara -
Best forCross-platform .NET-oriented RDF applications
A free, open-source RDF database with flexible deployment and strong .NET development APIs.
7.1/10★★★★☆Visit BrightstarDB -
Best forGeospatial and temporal RDF workloads
A focused self-hosted RDF database for linked geospatial and temporal workloads.
- Reasoning support
7.0/10★★★★☆Visit Strabon -
Best forLightweight Go-based RDF storage
A focused, Go-based RDF store for self-hosted SPARQL workloads.
6.9/10★★★☆☆Visit Trigo -
Best forEmbedded JavaScript and browser RDF storage
A focused open-source RDF store for embedding in browser and server-side JavaScript apps.
6.8/10★★★☆☆Visit Quadstore -
Best forSmall self-hosted RDF deployments with inference
A focused self-hosted RDF store for teams that need storage and inference.
- Reasoning support
6.7/10★★★☆☆Visit Parliament -
Best forBasic free RDF serving on macOS
A focused free RDF server for macOS, with core HTTP and SPARQL capabilities.
6.6/10★★★☆☆Visit RedStore
No tools match those filters.
Compare at a glance
| # | Tool | Free plan | Paid from | Deployment options | SPARQL support | Reasoning support | Score |
|---|---|---|---|---|---|---|---|
| 1 | GraphDB | Yes | Hybrid | Sparql 1.1 | Yes | 9.3 | |
| 2 | AllegroGraph | Yes | 9.1 | ||||
| 3 | Stardog | Yes | 9.0 | ||||
| 4 | Fluree DB | Yes | Free | Sparql 1.1 | Yes | 8.9 | |
| 5 | OpenLink Virtuoso | Free | 8.8 | ||||
| 6 | Eclipse RDF4J | Free | Self-hosted | Sparql 1.2 | Yes | 8.6 | |
| 7 | Apache Jena Fuseki | Free | Self-hosted | Sparql 1.1 | Yes | 8.5 | |
| 8 | RDFox | No | 8.4 | ||||
| 9 | QLever | Free | Self-hosted | Sparql 1.1 | 8.3 | ||
| 10 | eccenca Corporate Memory | Hybrid | Sparql 1.1 | Yes | 8.2 | ||
| 11 | Corese | Yes | Free | Self-hosted | Sparql 1.1 | Yes | 8.1 |
| 12 | sparq | Free | Self-hosted | Sparql 1.2 | Yes | 8.0 | |
| 13 | Tentris | Yes | Self-hosted | Sparql 1.1 | No | 7.9 | |
| 14 | TriplyDB | Yes | Free | Hybrid | Sparql 1.1 | Yes | 7.8 |
| 15 | Halyard | Free | Hybrid | Sparql 1.1 | 7.7 | ||
| 16 | qEndpoint | Free | Self-hosted | Sparql 1.1 | 7.6 | ||
| 17 | gStore | Free | Self-hosted | Sparql 1.1 | Yes | 7.5 | |
| 18 | Apache Rya | Yes | Free | Hybrid | Yes | 7.4 | |
| 19 | Dydra | Yes | Cloud | Sparql 1.1 | Yes | 7.3 | |
| 20 | Mulgara | Free | Self-hosted | Yes | 7.2 | ||
| 21 | BrightstarDB | Yes | Free | Self-hosted | Sparql 1.1 | 7.1 | |
| 22 | Strabon | Yes | Free | Self-hosted | Sparql 1.1 | Yes | 7.0 |
| 23 | Trigo | Free | Self-hosted | Sparql 1.1 | 6.9 | ||
| 24 | Quadstore | Free | Self-hosted | Sparql 1.1 | 6.8 | ||
| 25 | Parliament | Free | Self-hosted | Yes | 6.7 | ||
| 26 | RedStore | Yes | Free | Self-hosted | Sparql 1.1 | 6.6 |
Head-to-head All 28 comparisons →
- GraphDB vs AllegroGraph
- GraphDB vs Stardog
- GraphDB vs Fluree DB
- GraphDB vs OpenLink Virtuoso
- GraphDB vs Eclipse RDF4J
- GraphDB vs Apache Jena Fuseki
- GraphDB vs RDFox
- AllegroGraph vs Stardog
- AllegroGraph vs Fluree DB
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How we rank RDF databases
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update