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Head-to-head · Knowledge Graph Software

AllegroGraph vs Mondeca

  • 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
Mondeca #18 in Knowledge Graph Software 7.4/10 Pricing on request ✓ 4 of 4 features Visit Mondeca

AllegroGraph leads on 0 checks, Mondeca 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 planonly AllegroGraph

AllegroGraph scores higher on our rubric for knowledge graph software: 8.6 against 7.4 out of 10; our editors rank them #6 and #18.

AllegroGraph is the better fit for enterprise semantic graphs with advanced operations. Mondeca is the better fit for large-scale ontology and semantic-content programs.

  • AllegroGraph fits best

    Enterprise semantic graphs with advanced operations

  • Mondeca fits best

    Large-scale ontology and semantic-content programs

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Side by side

Feature AllegroGraph 8.6/10 Visit ↗ Mondeca 7.4/10 Visit ↗
At a glance
Editor score 8.6 7.4
Ranking #6 in Knowledge Graph Software #18 in Knowledge Graph Software
Best for Enterprise semantic graphs with advanced operations Large-scale ontology and semantic-content programs
Pricing model Free plan + paid Paid
Starting price — Pricing on request
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web, Windows, macOS, Linux Web
Support Email, Docs Email, Tickets, Docs
Integrations 9 integrations 19 integrations
Built for Mid-market, Enterprise Mid-market, Enterprise
Features AllegroGraph 4/4 · Mondeca 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 CSV, Excel, OWL, RDF, XML, SKOS, RDF/XML, N-Triples, Turtle, N3, JSON-LD, RDF/JSON
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
  • Supports ontology, taxonomy, entity and relationship modeling
  • Imports and exports a wide range of semantic and structured formats
  • Combines inference, AI extraction, tagging, visualization and APIs
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
  • Pricing requires contact with sales
  • Its broad enterprise scope may exceed focused graph projects
  • Deployment and governance features may require organizational planning
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 →

Mondeca is an enterprise suite for managing taxonomies, ontologies, reference data and knowledge graphs. It is designed for organizations running large-scale ontology and semantic-content programs, with tools spanning data modeling,…

Read the review →
  1. AllegroGraphKnowledge Graph Software 8.6Free plan
  2. MondecaKnowledge Graph Software 7.4Pricing on request

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

  • Mondeca — where it wins

    • Supports ontology, taxonomy, entity and relationship modeling
    • Imports and exports a wide range of semantic and structured formats
    • Combines inference, AI extraction, tagging, visualization and APIs

    Where it doesn't

    • Pricing requires contact with sales
    • Its broad enterprise scope may exceed focused graph projects
    • Deployment and governance features may require organizational planning
  • AllegroGraph8.6/10 · Free plan

    A mature graph database combining semantic reasoning, operations, visualization, and AI features.

    Visit AllegroGraphFull verdict →
  • Mondeca7.4/10 · Pricing on request

    A broad enterprise suite for modeling, enriching, governing and publishing knowledge graphs.

    Visit MondecaFull verdict →

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