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Head-to-head · RDF Databases

Stardog vs Fluree DB

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Stardog #3 in RDF Databases 9.0/10 Free plan Free plan✓ 0 of 3 features Visit Stardog
Fluree DB #4 in RDF Databases 8.9/10 Free plan Free plan✓ 3 of 3 features Visit Fluree

Stardog leads on 0 checks, Fluree DB on 0, and 4 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 scoreStardog · 9.0/10
  • Free planboth
  • Most featuresFluree DB · 3 of 3

Stardog scores higher on our rubric for rdf databases: 9.0 against 8.9 out of 10; our editors rank them #3 and #4.

Stardog is the better fit for enterprise virtual graphs and data federation. Fluree DB is the better fit for modern open-source RDF with search and lineage.

  • Stardog fits best

    Enterprise virtual graphs and data federation

  • Fluree DB fits best

    Modern open-source RDF with search and lineage

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 Stardog 9.0/10 Visit ↗ Fluree DB 8.9/10 Visit ↗
At a glance
Editor score 9.0 8.9
Ranking #3 in RDF Databases #4 in RDF Databases
Best for Enterprise virtual graphs and data federation Modern open-source RDF with search and lineage
Pricing model Free plan + paid Free
Starting price — Free
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Support Community, Docs · 24/7 Email, Community, Docs
Integrations 20 integrations 300+ integrations
Built for Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Stardog 0/3 · Fluree DB 3/3
Reasoning support Not checked yet ✓ (best)
RDF-star support Not checked yet ✓ (best)
Federated queries Not checked yet ✓ (best)
Specs
Deployment options Not checked yet Not checked yet
SPARQL support Not checked yet Sparql 1.1
Supported RDF formats Not checked yet JSON-LD, Turtle, N-Triples, N-Quads, TriG
Our review
Pros
  • Virtual graphs query remote relational, NoSQL, file, and SPARQL sources
  • Federation, inference, ontology management, caching, and scheduled triggers
  • Cloud and self-managed deployment with SQL, REST, GraphQL, and CLI access
  • 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
Cons
  • The Free plan is limited to 1 million stored edges
  • Free uses shared cloud hosting and includes community support
  • Enterprise pricing is contact-sales only
  • 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
Our verdict

Stardog is a knowledge-graph and semantic AI platform for enterprises that need to connect and query distributed data. Its virtual graphs can work across relational, NoSQL, file, cloud, and SPARQL sources without necessarily moving that…

Read the review →

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 →
  1. StardogRDF Databases 9.0Free plan
  2. Fluree DBRDF Databases 8.9Free plan

Strengths and trade-offs

  • Stardog — where it wins

    • Virtual graphs query remote relational, NoSQL, file, and SPARQL sources
    • Federation, inference, ontology management, caching, and scheduled triggers
    • Cloud and self-managed deployment with SQL, REST, GraphQL, and CLI access

    Where it doesn't

    • The Free plan is limited to 1 million stored edges
    • Free uses shared cloud hosting and includes community support
    • Enterprise pricing is contact-sales only

  • 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
  • Stardog9.0/10 · Free plan

    A broad enterprise platform for federated queries, virtual graphs, and semantic reasoning.

    Visit StardogFull verdict →
  • Fluree DB8.9/10 · Free plan

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

    Visit FlureeFull 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