vs

AnzoGraph vs OpenLink Virtuoso

AnzoGraph: MPP in-memory RDF graph database for OLAP-style SPARQL analytics, now Altair Graph Lakehouse under Siemens. OpenLink Virtuoso: Hybrid SQL/RDF engine that runs many of the largest public SPARQL endpoints.

key differences

  • Licensing: AnzoGraph is proprietary (Proprietary (Altair)); OpenLink Virtuoso is open source (copyleft) (GPL-2.0 (Open Source Edition); commercial edition proprietary).
  • Horizontal scaling is native in AnzoGraph and addon in OpenLink Virtuoso.
  • Transactions: AnzoGraph offers limited ACID; OpenLink Virtuoso offers full.
  • Only AnzoGraph has in-memory.
  • Only OpenLink Virtuoso has transactions, secondary indexes, full-text search, triggers, stored procedures.

choose anzograph for

  • +Enterprise knowledge-graph analytics over integrated data
  • +BI-style reporting and aggregation on RDF data
  • +Graph algorithms (PageRank, paths) over billions of triples
  • +Analytical engine behind the Altair Graph Studio data fabric

best at · Graph analytics, Knowledge graph, OLAP

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
Graph
Relational, XML
Type
Database engine
Database engine
Status
Active
Active
Developer
Altair (Siemens), formerly Cambridge Semantics
OpenLink Software
First release
2018
1998
Latest version
Graph Lakehouse 2026.0 (DB 3.3) (2026)
7.2.17 (May 7, 2026)
License
ProprietaryProprietary (Altair)
Open source (copyleft)GPL-2.0 (Open Source Edition); commercial edition proprietary
Free tier
—
✓
popularity
WhichDB Score
1.4
19.5
Rank
#547
#167
GitHub stars
–
976
Stack Overflow questions
–
533
scale & guarantees
Comfortable data size
Large (≤ 1 PB)
Large (≤ 1 PB)
Horizontal scaling
Native
Addon
Multi-region
None
None
ACID
Limited
Full
Consistency
Strong
Strong
Schema
Schemaless
Flexible
Architecture
Distributed, In memory
Single node, Client server, Distributed
deployment
Self-hosted
✓
✓
Vendor-managed cloud
—
—
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
–
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, Cypher
SPARQL, SQL, SPASQL
Client languages
–
ODBC, JDBC, Python, PHP, Jena/RDF4J adapters
Best for
Graph analytics, Knowledge graph, OLAP
Knowledge graph, OLAP, Content, Metadata

AnzoGraph vs OpenLink Virtuoso: FAQ

What is the difference between AnzoGraph and OpenLink Virtuoso?

AnzoGraph: MPP in-memory RDF graph database for OLAP-style SPARQL analytics, now Altair Graph Lakehouse under Siemens. OpenLink Virtuoso: Hybrid SQL/RDF engine that runs many of the largest public SPARQL endpoints. Licensing: AnzoGraph is proprietary (Proprietary (Altair)); OpenLink Virtuoso is open source (copyleft) (GPL-2.0 (Open Source Edition); commercial edition proprietary). Horizontal scaling is native in AnzoGraph and addon in OpenLink Virtuoso. Transactions: AnzoGraph offers limited ACID; OpenLink Virtuoso offers full.

When should I choose AnzoGraph over OpenLink Virtuoso?

Choose AnzoGraph for enterprise knowledge-graph analytics over integrated data; BI-style reporting and aggregation on RDF data; and graph algorithms (PageRank, paths) over billions of triples. Choose OpenLink Virtuoso for public Linked Open Data endpoints, large RDF datasets in life sciences and hybrid SQL plus RDF data integration.

Is AnzoGraph or OpenLink Virtuoso more popular?

OpenLink Virtuoso ranks #167 on the WhichDB Score (19.5/100) and AnzoGraph ranks #547 (1.4/100). Popularity is not fit: check the requirements that matter for your project.

Are AnzoGraph and OpenLink Virtuoso open source?

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