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Head-to-head · RDF Databases

AllegroGraph vs OpenLink Virtuoso

  • Updated Oct 2026
  • Both researched from official sources
  • 1 check side by side
Higher score AllegroGraph #2 in RDF Databases 9.1/10 Free plan Free plan✓ 0 of 3 features Visit AllegroGraph
OpenLink Virtuoso #5 in RDF Databases 8.8/10 Open source · 30-day trial Free trial✓ 0 of 3 features Visit site

AllegroGraph leads on 0 checks, OpenLink Virtuoso on 0, and 1 is even. Who comes out ahead on the 1 yes/no, price and count check where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAllegroGraph · 9.1/10
  • Free planonly AllegroGraph
  • Free trialonly OpenLink Virtuoso

AllegroGraph scores higher on our rubric for rdf databases: 9.1 against 8.8 out of 10; our editors rank them #2 and #5.

AllegroGraph is the better fit for enterprise RDF, reasoning, and graph analytics. OpenLink Virtuoso is the better fit for RDF plus relational SQL workloads.

  • AllegroGraph fits best

    Enterprise RDF, reasoning, and graph analytics

  • OpenLink Virtuoso fits best

    RDF plus relational SQL workloads

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Side by side

Feature AllegroGraph 9.1/10 Visit ↗ OpenLink Virtuoso 8.8/10 Visit ↗
At a glance
Editor score 9.1 8.8
Ranking #2 in RDF Databases #5 in RDF Databases
Best for Enterprise RDF, reasoning, and graph analytics RDF plus relational SQL workloads
Pricing model Free plan + paid Free
Starting price Free plan Free
Free plan ✓ (best) Not checked yet
Free trial — 30 days
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web, Linux Windows, macOS, Linux
Support Email, Docs Tickets, Community, Docs
Integrations 18 integrations 8 integrations
Built for Mid-market, Enterprise Small business, Mid-market, Enterprise
Features AllegroGraph 0/3 · OpenLink Virtuoso 0/3
Reasoning support Not checked yet Not checked yet
RDF-star support Not checked yet Not checked yet
Federated queries Not checked yet Not checked yet
Specs
Deployment options Not checked yet Not checked yet
SPARQL support Not checked yet Not checked yet
Supported RDF formats Not checked yet Not checked yet
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
  • Combines relational SQL, native RDF quads, SPARQL, and SPASQL
  • Connects to remote SQL and XML sources through virtual databases
  • Includes replication, clustering, and role-based and row-level security
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
  • Commercial offer dates are historical and require pricing confirmation
  • Advanced Enterprise capabilities use custom licensing terms
  • Its broad multi-model scope may exceed a single-purpose RDF database
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 →

OpenLink Virtuoso is a cross-platform multi-model database and data integration platform for organizations working with relational, RDF, graph, XML, and federated data. It suits teams that need SQL alongside RDF storage and graph querying,…

Read the review →
  1. AllegroGraphRDF Databases 9.1Free plan
  2. OpenLink VirtuosoRDF Databases 8.8Open source · 30-day trial

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

  • OpenLink Virtuoso — where it wins

    • Combines relational SQL, native RDF quads, SPARQL, and SPASQL
    • Connects to remote SQL and XML sources through virtual databases
    • Includes replication, clustering, and role-based and row-level security

    Where it doesn't

    • Commercial offer dates are historical and require pricing confirmation
    • Advanced Enterprise capabilities use custom licensing terms
    • Its broad multi-model scope may exceed a single-purpose RDF database
  • AllegroGraph9.1/10 · Free plan

    A broad RDF platform for reasoning, federation, analytics, and vector-enabled knowledge graphs.

    Visit AllegroGraphFull verdict →
  • OpenLink Virtuoso8.8/10 · Open source · 30-day trial

    A cross-platform choice for teams combining relational SQL with RDF and graph workloads.

    Visit siteFull 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