AllegroGraph
AllegroGraph: A mature graph database combining semantic reasoning, operations, visualization, and AI features. Ranked #6 of 33 in Knowledge Graph Software by our editors (8.6/10); pricing: Free plan; best for enterprise semantic graphs with advanced operations.
At a glance
- Editor score8.6 / 10
- PricingFree plan
- Best forEnterprise semantic graphs with advanced operations
- Free planYes
- Semantic reasoningYes
- Founded1984 · Lafayette, California, USA
- Facts checked21 Sep 2026
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
Our verdict on AllegroGraph
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 Prolog. Its audience is teams that need semantic modeling and querying alongside operational capabilities such as replication, federation, and horizontal sharding. Browser-based administration, AGWebView, and Gruff add management, visualization, and visual query-building options.
The pricing structure gives teams a defined entry point. The Free plan supports up to 5 million triples and has no expiration date. The Enterprise plan provides unlimited triples, no server limit, and deployment on-premises or in the cloud. Enterprise pricing is quote-based. Both editions are also available through the AWS and Microsoft Azure Marketplaces with hourly pricing. That makes AllegroGraph suitable for evaluation and smaller graph stores, while larger deployments can align capacity and hosting with enterprise requirements.
Its main strength is the combination of semantic depth and operational breadth. AllegroGraph supports RDF, RDFS, OWL, JSON, and JSON-LD storage; SPARQL 1.1 with named graphs; RDFS++ and OWL 2 RL reasoning; and Prolog rules and querying. FedShard supports horizontal sharding and federation, while ACID transactions, replication, and warm standby address operational needs. Clients and integrations include REST, Java, Python, Lisp, RDF4J, Jena, JavaScript, SOLR, MongoDB, and OpenAI ChatGPT, with vector storage and LLM integration included. Choose AllegroGraph when advanced semantic graphs, multiple query languages, or distributed operations matter. A smaller project needing only basic graph storage may be better served by a simpler product.
Your product? Our editors can test AllegroGraph in depth and publish a review, labelled as paid · from $149/mo →
AllegroGraph pricing
All 2 AllegroGraph plans and prices →
AllegroGraph fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Ontology modeling | Yes |
| Semantic reasoning | Yes |
| RDF/SPARQL support | Yes |
| Graph visualization | Yes |
| Import formats | JSON-LD, N-Quads, N-Triples, Extended N-Quads, RDF/XML, TriG, TriX, Turtle, JSON, JSONLines, CSV |
| Deployment | Both |
| Query languages | SPARQL, Prolog |
| Deployment | Cloud, Self-hosted |
| Platforms | Web, Windows, macOS, Linux |
| Support | Email, Docs |
| Built for | Mid-market, Enterprise (editorial estimate) |
| Integrations | 9 integrations: Java, Python, Lisp, Eclipse RDF4J, Apache Jena, JavaScript … |
| Pricing | Free plan (source) |
| Website | allegrograph.com |
| Facts checked | 21 Sep 2026 |
AllegroGraph integrations
AllegroGraph lists 9 integrations on its own site.
- Java
- Python
- Lisp
- Eclipse RDF4J
- Apache Jena
- JavaScript
- SOLR
- MongoDB
- OpenAI ChatGPT
Alternatives to AllegroGraph
- Neo4jA developer-focused property graph with broad tooling, cloud options, and AI-ready search.9.3
- ProtégéA strong free choice for OWL ontology work, with collaboration and reasoning options.9.1
- Progress SemaphoreA mature platform for ontology management, semantic enrichment, and enterprise knowledge graphs.9.0
See all AllegroGraph alternatives →
AllegroGraph vs the competition
- AllegroGraph vs Neo4j
- AllegroGraph vs Protégé
- AllegroGraph vs Progress Semaphore
- AllegroGraph vs Apache Jena Fuseki
- AllegroGraph vs Stardog
- AllegroGraph vs PoolParty Semantic Suite
Compare AllegroGraph with any tool side by side →
Also Ranked In
AllegroGraph is ranked in 3 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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