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Head-to-head · RDF Databases

Fluree DB vs RDFox

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Fluree DB #4 in RDF Databases 8.9/10 Free plan Free plan✓ 3 of 3 features Visit Fluree
RDFox #8 in RDF Databases 8.4/10 Pricing on request ✓ 0 of 3 features Visit RDFox

Fluree DB leads on 1 check, RDFox on 0, and 3 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreFluree DB · 8.9/10
  • Free planonly Fluree DB
  • Most featuresFluree DB · 3 of 3

Fluree DB scores higher on our rubric for rdf databases: 8.9 against 8.4 out of 10; our editors rank them #4 and #8.

Fluree DB offers free plan; RDFox doesn't.

Fluree DB is the better fit for modern open-source RDF with search and lineage. RDFox is the better fit for enterprises needing advanced semantic reasoning.

  • Fluree DB fits best

    Modern open-source RDF with search and lineage

  • RDFox fits best

    Enterprises needing advanced semantic reasoning

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.

Side by side

Feature Fluree DB 8.9/10 Visit ↗ RDFox 8.4/10 Visit ↗
At a glance
Editor score 8.9 8.4
Ranking #4 in RDF Databases #8 in RDF Databases
Best for Modern open-source RDF with search and lineage Enterprises needing advanced semantic reasoning
Pricing model Free Paid
Starting price Free Pricing on request
Free plan ✓ (best) —
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted, Desktop
Platforms Web Web, Windows, macOS, Linux
Support Email, Community, Docs Email, Community, Docs
Integrations 300+ integrations 2 integrations
Built for Small business, Mid-market, Enterprise Mid-market, Enterprise
Features Fluree DB 3/3 · RDFox 0/3
Reasoning support ✓ (best) Not checked yet
RDF-star support ✓ (best) Not checked yet
Federated queries ✓ (best) Not checked yet
Specs
Deployment options Not checked yet Not checked yet
SPARQL support Sparql 1.1 Not checked yet
Supported RDF formats JSON-LD, Turtle, N-Triples, N-Quads, TriG Not checked yet
Our review
Pros
  • Free open-source plan with local and self-hosted deployment
  • Combines reasoning, time travel, branching, and query-time policies
  • Built-in BM25 full-text, HNSW vector, and federated search
  • Supports SPARQL 1.1, OWL 2, SWRL and Datalog reasoning.
  • Incremental reasoning can materialize derived facts automatically.
  • Offers REST and Java APIs, a web console and high availability.
Cons
  • Enterprise pricing is custom
  • The feature set may exceed the needs of simple RDF projects
  • Cloud deployment is offered, but plan-level cloud details are limited
  • No free plan; access to pricing requires contacting sales.
  • Its semantic reasoning focus may exceed simpler RDF storage needs.
  • Deployment and API options may require technical setup.
Our verdict

Fluree DB is an open-source semantic graph database for developers and organizations building governed knowledge graphs and AI data foundations. It stores RDF data in an immutable, temporal ledger and supports JSON-LD, SPARQL 1.1, RDFS,…

Read the review →

RDFox is an in-memory knowledge graph database and semantic reasoning engine from Oxford Semantic Technologies. It stores RDF data, supports SPARQL 1.1 queries, and derives facts from rules and ontological axioms. The product is aimed at…

Read the review →
  1. Fluree DBRDF Databases 8.9Free plan
  2. RDFoxRDF Databases 8.4Pricing on request

Strengths and trade-offs

  • Fluree DB — where it wins

    • Free open-source plan with local and self-hosted deployment
    • Combines reasoning, time travel, branching, and query-time policies
    • Built-in BM25 full-text, HNSW vector, and federated search

    Where it doesn't

    • Enterprise pricing is custom
    • The feature set may exceed the needs of simple RDF projects
    • Cloud deployment is offered, but plan-level cloud details are limited

  • RDFox — where it wins

    • Supports SPARQL 1.1, OWL 2, SWRL and Datalog reasoning.
    • Incremental reasoning can materialize derived facts automatically.
    • Offers REST and Java APIs, a web console and high availability.

    Where it doesn't

    • No free plan; access to pricing requires contacting sales.
    • Its semantic reasoning focus may exceed simpler RDF storage needs.
    • Deployment and API options may require technical setup.
  • Fluree DB8.9/10 · Free plan

    An open-source RDF database for governed knowledge graphs and AI data foundations.

    Visit FlureeFull verdict →
  • RDFox8.4/10 · Pricing on request

    RDFox combines SPARQL querying with rule-based and ontology-driven reasoning for RDF data.

    Visit RDFoxFull verdict →

More comparisons

All RDF databases comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update