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AnzoGraph vs Stardog

AnzoGraph: MPP in-memory RDF graph database for OLAP-style SPARQL analytics, now Altair Graph Lakehouse under Siemens. Stardog: Enterprise knowledge-graph platform: RDF store, reasoning and virtual graphs over your sources.

key differences

  • AnzoGraph is built for larger datasets (≤ 1 PB) than Stardog (≤ 10 TB).
  • Horizontal scaling is native in AnzoGraph and none in Stardog.
  • Transactions: AnzoGraph offers limited ACID; Stardog offers full.
  • Only AnzoGraph has joins, in-memory.
  • Only Stardog has transactions, full-text search, role-based access, online schema changes.

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 stardog for

  • +Enterprise data fabric and semantic layer
  • +Life-sciences and pharma knowledge graphs
  • +Regulatory and compliance data integration
  • +Natural-language question answering over enterprise data

best at · Knowledge graph, Metadata, RAG

AnzoGraphMPP in-memory RDF graph database for OLAP-style SPARQL analytics, now Altair Graph Lakehouse under Siemens.
StardogEnterprise knowledge-graph platform: RDF store, reasoning and virtual graphs over your sources.
overview
Primary model
RDF / Triple Store
RDF / Triple Store
Also supports
Graph
Graph
Type
Database engine
Database engine
Status
Active
Active
Developer
Altair (Siemens), formerly Cambridge Semantics
Stardog Union
First release
2018
2012
Latest version
Graph Lakehouse 2026.0 (DB 3.3) (2026)
12.2.1 (Oct 26, 2026)
License
ProprietaryProprietary (Altair)
ProprietaryProprietary (free 1-year renewable license available)
Free tier
—
✓
popularity
WhichDB Score
1.4
12.7
Rank
#547
#265
GitHub stars
–
–
Stack Overflow questions
–
97
scale & guarantees
Comfortable data size
Large (≤ 1 PB)
Medium (≤ 10 TB)
Horizontal scaling
Native
None
Multi-region
None
None
ACID
Limited
Full
Consistency
Strong
Strong
Schema
Schemaless
Flexible
Architecture
Distributed, In memory
Single node, Primary replica, Client server
deployment
Self-hosted
✓
✓
Vendor-managed cloud
—
✓
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
–
AWS, Azure
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, GraphQL, SQL, Stardog Rules
Client languages
–
Java, Python, JavaScript, .NET
Best for
Graph analytics, Knowledge graph, OLAP
Knowledge graph, Metadata, RAG, Traversal
Add more to this comparisonNot sure either fits? Try smart match

AnzoGraph vs Stardog: FAQ

What is the difference between AnzoGraph and Stardog?

AnzoGraph: MPP in-memory RDF graph database for OLAP-style SPARQL analytics, now Altair Graph Lakehouse under Siemens. Stardog: Enterprise knowledge-graph platform: RDF store, reasoning and virtual graphs over your sources. AnzoGraph is built for larger datasets (≤ 1 PB) than Stardog (≤ 10 TB). Horizontal scaling is native in AnzoGraph and none in Stardog. Transactions: AnzoGraph offers limited ACID; Stardog offers full.

When should I choose AnzoGraph over Stardog?

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 Stardog for enterprise data fabric and semantic layer; life-sciences and pharma knowledge graphs; and regulatory and compliance data integration.

Is AnzoGraph or Stardog more popular?

Stardog ranks #265 on the WhichDB Score (12.7/100) and AnzoGraph ranks #547 (1.4/100). Popularity is not fit: check the requirements that matter for your project.

Are AnzoGraph and Stardog open source?

No. AnzoGraph is proprietary, closed-source software. No. Stardog is proprietary, closed-source software.