vs

AllegroGraph vs OpenLink Virtuoso

AllegroGraph: Lisp-built RDF and document knowledge graph with vector store, reasoning and LLM agents. OpenLink Virtuoso: Hybrid SQL/RDF engine that runs many of the largest public SPARQL endpoints.

key differences

  • Licensing: AllegroGraph is proprietary (Proprietary (free edition with triple limit)); OpenLink Virtuoso is open source (copyleft) (GPL-2.0 (Open Source Edition); commercial edition proprietary).
  • Horizontal scaling is native in AllegroGraph and addon in OpenLink Virtuoso.
  • Only AllegroGraph has vector search, json, encryption at rest, online schema changes.
  • Only OpenLink Virtuoso has joins, secondary indexes, triggers, columnar storage, compression.

choose allegrograph for

  • +Neuro-symbolic AI and GraphRAG
  • +Healthcare and life-sciences knowledge graphs
  • +Intelligence and event analytics with spatio-temporal reasoning
  • +Entity-event knowledge graphs

best at · Knowledge graph, RAG, Vector search

choose virtuoso for

  • +Public Linked Open Data endpoints
  • +Large RDF datasets in life sciences
  • +Hybrid SQL plus RDF data integration
  • +Semantic web publishing

best at · Knowledge graph, OLAP, Content

overview
Primary model
RDF / Triple Store
RDF / Triple Store
Also supports
Document, Vector
Relational, XML
Type
Database engine
Database engine
Status
Active
Active
Developer
Franz Inc.
OpenLink Software
First release
2004
1998
Latest version
9.1.0 (Oct 15, 2026)
7.2.17 (May 7, 2026)
License
ProprietaryProprietary (free edition with triple limit)
Open source (copyleft)GPL-2.0 (Open Source Edition); commercial edition proprietary
Free tier
✓
✓
popularity
WhichDB Score
16.1
19.5
Rank
#200
#167
GitHub stars
–
976
Stack Overflow questions
79
533
scale & guarantees
Comfortable data size
Large (≤ 1 PB)
Large (≤ 1 PB)
Horizontal scaling
Native
Addon
Multi-region
Read replicas
None
ACID
Full
Full
Consistency
Strong
Strong
Schema
Flexible
Flexible
Architecture
Single node, Distributed, Client server
Single node, Client server, Distributed
deployment
Self-hosted
✓
✓
Vendor-managed cloud
✓
—
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
AWS
AWS
capabilities
Transactions
✓
✓
Joins
—
✓
Secondary indexes
—
✓
Full-text search
✓
✓
Vector search
✓
—
Geospatial
✓
✓
JSON
✓
—
Change data capture
—
—
Triggers
—
✓
Stored procedures
✓
✓
Materialized views
—
—
TTL / expiry
—
—
Pub/Sub
—
—
Columnar storage
—
✓
In-memory
—
—
Durable persistence
✓
✓
Compression
—
✓
Encryption at rest
✓
—
Role-based access
✓
✓
Time travel
—
—
Branching
—
—
Online schema changes
✓
—
Streaming ingest
—
—
Offline sync
—
—
Runs in WebAssembly
—
—
interfaces
Query languages
SPARQL, Prolog, Lisp
SPARQL, SQL, SPASQL
Client languages
Java, Python, JavaScript, Common Lisp
ODBC, JDBC, Python, PHP, Jena/RDF4J adapters
Best for
Knowledge graph, RAG, Vector search, Geo
Knowledge graph, OLAP, Content, Metadata

AllegroGraph vs OpenLink Virtuoso: FAQ

What is the difference between AllegroGraph and OpenLink Virtuoso?

AllegroGraph: Lisp-built RDF and document knowledge graph with vector store, reasoning and LLM agents. OpenLink Virtuoso: Hybrid SQL/RDF engine that runs many of the largest public SPARQL endpoints. Licensing: AllegroGraph is proprietary (Proprietary (free edition with triple limit)); OpenLink Virtuoso is open source (copyleft) (GPL-2.0 (Open Source Edition); commercial edition proprietary). Horizontal scaling is native in AllegroGraph and addon in OpenLink Virtuoso. Only AllegroGraph has vector search, json, encryption at rest, online schema changes.

When should I choose AllegroGraph over OpenLink Virtuoso?

Choose AllegroGraph for neuro-symbolic AI and GraphRAG; healthcare and life-sciences knowledge graphs; and intelligence and event analytics with spatio-temporal reasoning. Choose OpenLink Virtuoso for public Linked Open Data endpoints, large RDF datasets in life sciences and hybrid SQL plus RDF data integration.

Is AllegroGraph or OpenLink Virtuoso more popular?

OpenLink Virtuoso ranks #167 on the WhichDB Score (19.5/100) and AllegroGraph ranks #200 (16.1/100). Popularity is not fit: check the requirements that matter for your project.

Are AllegroGraph and OpenLink Virtuoso open source?

No. AllegroGraph is proprietary, closed-source software. Yes. OpenLink Virtuoso is open source. License: GPL-2.0 (Open Source Edition); commercial edition proprietary.