Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · Knowledge Graph Software

AllegroGraph vs GraphDB

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score AllegroGraph #6 in Knowledge Graph Software 8.6/10 Free plan Free plan✓ 4 of 4 features Visit AllegroGraph
GraphDB #11 in Knowledge Graph Software 7.9/10 Free plan Free plan✓ 4 of 4 features Visit GraphDB

AllegroGraph leads on 0 checks, GraphDB on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAllegroGraph · 8.6/10
  • Free planboth

AllegroGraph scores higher on our rubric for knowledge graph software: 8.6 against 7.9 out of 10; our editors rank them #6 and #11.

AllegroGraph is the better fit for enterprise semantic graphs with advanced operations. GraphDB is the better fit for teams needing a full-featured RDF knowledge graph.

  • AllegroGraph fits best

    Enterprise semantic graphs with advanced operations

  • GraphDB fits best

    Teams needing a full-featured RDF knowledge graph

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 AllegroGraph 8.6/10 Visit ↗ GraphDB 7.9/10 Visit ↗
At a glance
Editor score 8.6 7.9
Ranking #6 in Knowledge Graph Software #11 in Knowledge Graph Software
Best for Enterprise semantic graphs with advanced operations Teams needing a full-featured RDF knowledge graph
Pricing model Free plan + paid Free plan + paid
Starting price — —
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted, Desktop
Platforms Web, Windows, macOS, Linux Web, Windows, macOS, Linux
Support Email, Docs Community, Docs
Integrations 9 integrations 7 integrations
Built for Mid-market, Enterprise Small business, Enterprise
Features AllegroGraph 4/4 · GraphDB 4/4
Ontology modeling ✓ ✓
Semantic reasoning ✓ ✓
RDF/SPARQL support ✓ ✓
Graph visualization ✓ ✓
Specs
Import formats JSON-LD, N-Quads, N-Triples, Extended N-Quads, RDF/XML, TriG, TriX, Turtle, JSON, JSONLines, CSV Turtle, Turtle-star, N-Triples, N-Quads, JSON-LD, NDJSON-LD, RDF/JSON, RDF/XML, TriX, TriG-star, BinaryRDF
Deployment Both Both
Query languages SPARQL, Prolog SPARQL
Our review
Pros
  • Free plan supports up to 5 million triples without expiration
  • Combines SPARQL, Prolog, RDF storage, and semantic reasoning
  • Supports sharding, federation, replication, and cloud or on-premises deployment
  • RDF 1.1, SPARQL 1.1, RDF-Star, and SPARQL-Star support
  • Reasoning across RDFS, OWL profiles, and custom rulesets
  • Visualization, imports, connectors, and enterprise clustering
Cons
  • Enterprise pricing is quote-based
  • Advanced capabilities may exceed the needs of smaller graph projects
  • The Free plan is limited to 5 million triples
  • Enterprise pricing is custom
  • GraphDB Free uses a single-core license
  • Free edition provides community support
Our verdict

AllegroGraph is a semantic graph database for organizations building knowledge graphs, data fabrics, and AI applications. It stores RDF, graph, vector, document, and temporal data, with support for SPARQL, OWL reasoning, SHACL, rules, and…

Read the review →

GraphDB is an RDF-based semantic graph database for organizations building and managing knowledge graphs. It is suited to teams that need RDF and SPARQL support alongside ontology-driven inference, consistency checking, custom reasoning…

Read the review →
  1. AllegroGraphKnowledge Graph Software 8.6Free plan
  2. GraphDBKnowledge Graph Software 7.9Free plan

Strengths and trade-offs

  • AllegroGraph — where it wins

    • Free plan supports up to 5 million triples without expiration
    • Combines SPARQL, Prolog, RDF storage, and semantic reasoning
    • Supports sharding, federation, replication, and cloud or on-premises deployment

    Where it doesn't

    • Enterprise pricing is quote-based
    • Advanced capabilities may exceed the needs of smaller graph projects
    • The Free plan is limited to 5 million triples

  • GraphDB — where it wins

    • RDF 1.1, SPARQL 1.1, RDF-Star, and SPARQL-Star support
    • Reasoning across RDFS, OWL profiles, and custom rulesets
    • Visualization, imports, connectors, and enterprise clustering

    Where it doesn't

    • Enterprise pricing is custom
    • GraphDB Free uses a single-core license
    • Free edition provides community support

More comparisons

All knowledge graph software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update