Stardog
Stardog: A semantic federation platform for querying distributed data through virtual graphs. Ranked #6 of 24 in Data Federation Software by our editors (8.3/10); pricing: Free plan; best for semantic and ontology-driven federation.
At a glance
- Editor score8.3 / 10
- PricingFree plan
- Best forSemantic and ontology-driven federation
- Free planYes
- Cloud hostedYes
- Founded2006 · New York, New York, United States
- Facts checked20 Sep 2026
Where it wins
- Virtual graphs connect relational, NoSQL, file, and SPARQL sources
- Supports SQL, SPARQL, REST, GraphQL, and programmatic access
- Semantic reasoning, ontology management, caching, and scheduled triggers
Where it doesn't
- The Free plan allows up to 1 million stored edges
- Enterprise deployment includes custom pricing through sales
- Stardog is proprietary rather than open source
Our verdict on Stardog
Stardog is a knowledge-graph and semantic data platform for enterprises that need to connect and query distributed data. Its virtual graphs can query remote relational, NoSQL, file, and SPARQL sources, while federated queries combine local databases with remote data sources. Teams can work through SPARQL 1.1, a BI/SQL endpoint, REST APIs, GraphQL, and programmatic access. Data teams, analysts, and application developers can also use Designer for data modeling and ontology management.
The platform’s strongest distinction is its semantic layer. Inference and rule-based semantic reasoning can add context to federated data, while data-quality constraints and ontology management support governed models. Cached datasets are available for virtual graphs, and scheduled query triggers can send webhook notifications. Role-based security and resource permissions address access control. This combination suits organizations that need more than a connector layer and want semantic relationships to guide discovery and querying.
Stardog has a Free cloud plan with shared hosting, up to 1 million stored edges, community support, and a BI/SQL endpoint. Enterprise adds managed cloud or self-managed deployment, a custom stored-edge limit, premium support, and a 99.9% uptime SLA. The platform also connects with SQL, Python, REST, Java, GraphQL, HTTP, CLI, Spark, Apache Cassandra, AWS Athena, Databricks SQL, Elasticsearch, Google BigQuery, MongoDB, and MySQL. Choose Stardog when ontology-driven federation and semantic reasoning are central requirements. Teams seeking a simpler federation layer or an open-source product may prefer an alternative.
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Stardog pricing
All 2 Stardog plans and prices →
Stardog fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Cloud hosted | Yes |
| Self-hosted | Yes |
| SQL querying | Yes |
| Query result cache | Yes |
| Row-level security | Not verified |
| API access | Yes |
| Scheduled queries | Yes |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Compliance & security | SOC 2 |
| Support | Community, Docs · 24/7 |
| Built for | Mid-market, Enterprise (editorial estimate) |
| Integrations | 20 integrations: SQL, Python, REST, Java, GraphQL, HTTP … See all → |
| Pricing | Free plan (source) |
| Website | stardog.com |
| Facts checked | 20 Sep 2026 |
Stardog integrations
Stardog lists 20 integrations on its own site.
- SQL
- Python
- REST
- Java
- GraphQL
- HTTP
- CLI
- Spark
- Apache Cassandra
- AWS Athena
- Databricks SQL
- Elasticsearch
- Google BigQuery
- MongoDB
- MySQL
- Oracle
- PostgreSQL
- Salesforce
- Snowflake
- Trino
See all Stardog integrations →
Alternatives to Stardog
- Denodo PlatformA governed data federation layer with broad access methods, security controls, and enterprise scale.9.3
- Starburst GalaxyA cloud-native federation platform with a free tier and usage-based paid plans.9.1
- DremioA broad federation and lakehouse platform with free, managed-cloud, and self-managed options.8.8
See all Stardog alternatives →
Stardog vs the competition
- Stardog vs Denodo Platform
- Stardog vs Starburst Galaxy
- Stardog vs Dremio
- Stardog vs Trino
- Stardog vs Querona
- Stardog vs SAS Federation Server
Compare Stardog with any tool side by side →
Also Ranked In
Stardog is ranked in 5 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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