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Head-to-head · RDF Databases

AllegroGraph vs Fluree DB

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score AllegroGraph #2 in RDF Databases 9.1/10 Free plan Free plan✓ 0 of 3 features Visit AllegroGraph
Fluree DB #4 in RDF Databases 8.9/10 Free plan Free plan✓ 3 of 3 features Visit Fluree

AllegroGraph 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 scoreAllegroGraph · 9.1/10
  • Free planboth
  • Most featuresFluree DB · 3 of 3

AllegroGraph scores higher on our rubric for rdf databases: 9.1 against 8.9 out of 10; our editors rank them #2 and #4.

AllegroGraph is the better fit for enterprise RDF, reasoning, and graph analytics. Fluree DB is the better fit for modern open-source RDF with search and lineage.

  • AllegroGraph fits best

    Enterprise RDF, reasoning, and graph analytics

  • Fluree DB fits best

    Modern open-source RDF with search and lineage

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Side by side

Feature AllegroGraph 9.1/10 Visit ↗ Fluree DB 8.9/10 Visit ↗
At a glance
Editor score 9.1 8.9
Ranking #2 in RDF Databases #4 in RDF Databases
Best for Enterprise RDF, reasoning, and graph analytics Modern open-source RDF with search and lineage
Pricing model Free plan + paid Free
Starting price Free plan Free
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web, Linux Web
Support Email, Docs Email, Community, Docs
Integrations 18 integrations 300+ integrations
Built for Mid-market, Enterprise Small business, Mid-market, Enterprise
Features AllegroGraph 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
  • Supports RDF triples and quads with SPARQL, Prolog, RDFS++, and OWL reasoning
  • Combines federation, sharding, replication, geospatial, temporal, and vector capabilities
  • Offers triple-level security plus integrations across analytics and data platforms
  • 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
  • Paid licensing is quotation-based rather than publicly listed
  • SQL support is not available
  • Its broad feature set is more specialized than a focused graph database
  • 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

AllegroGraph is a persistent graph database and application framework for organizations building enterprise knowledge graphs, data fabrics, semantic applications, and neuro-symbolic AI systems. It stores RDF triples and quads and supports…

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. AllegroGraphRDF Databases 9.1Free plan
  2. Fluree DBRDF Databases 8.9Free plan

Strengths and trade-offs

  • AllegroGraph — where it wins

    • Supports RDF triples and quads with SPARQL, Prolog, RDFS++, and OWL reasoning
    • Combines federation, sharding, replication, geospatial, temporal, and vector capabilities
    • Offers triple-level security plus integrations across analytics and data platforms

    Where it doesn't

    • Paid licensing is quotation-based rather than publicly listed
    • SQL support is not available
    • Its broad feature set is more specialized than a focused graph database

  • 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

More comparisons

All RDF databases comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update