Stardog vs Virtuoso Universal Server
Stardog
stardog.comVirtuoso Universal Server
virtuoso.openlinksw.comSide by side
| Figure | Stardog | Virtuoso Universal Server |
|---|---|---|
| Price from | Free | $8.33/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 5 | 7 |
| Spec score · RDF Databases | 8.4 (#4) | 8.4 (#5) |
| Spec score · Data Virtualization Software | 8.4 (#7) | 8.4 (#8) |
| Spec score · Knowledge Graph Software | 8.4 (#11) | 8.5 (#9) |
| Company headquarters | The current LinkedIn company profile lists headquarters in New York, New York, while Stardog’s own footer lists an Arlington, Virginia address. | LinkedIn lists OpenLink Software headquarters in Needham, Massachusetts, with 11–50 employees and a 1992 founding year. |
| Deployment | Stardog can run as a managed AWS cloud service, in customer cloud environments, or on premises through Docker, Kubernetes, AWS Marketplace, and Azure Marketplace. | The open-source edition provides installers for Linux, macOS, and Windows, Docker instructions, and source builds for those operating systems. |
| Documentation depth | Official documentation includes administration, querying, virtualization, inference, constraints, tutorials, API references, examples and application-building guidance. | Official documentation includes manuals and wiki material for Virtuoso, the open-source edition, the Virtuoso Authentication Layer, and Java provider APIs. |
| Founded | 2006 | 1992 |
| Inference | Its Inference Engine applies business rules at query time and exposes the logic behind results for explainability. | The product supports OWL/RDFS and SPIN reasoning and inference, including subclass, subproperty, sameAs, equivalent-class, and equivalent-property relationships. |
| License | Stardog Free is proprietary, licensed software and the pricing FAQ explicitly says it is not open source. | Virtuoso Open-Source Edition is licensed under GNU GPL version 2; commercial editions use proprietary licensing. |
| Rating on Capterra | 5.0 out of 5 from 7 reviews | 3.5 out of 5 from 2 reviews |
| Rating on G2 | 4.2 out of 5 from 18 reviews | 4.3 out of 5 from 4 reviews |
| Rating on GetApp | 5.0 out of 5 from 7 reviews | 3.5 out of 5 from 2 reviews |
| Rating on Software Advice | 5.0 out of 5 from 7 reviews | 3.5 out of 5 from 2 reviews |
| Support | Enterprise licenses include base support, a dedicated Customer Success representative, and access to Solutions Architects. | Commercial support can include bug fixes, feature enhancements, performance tuning, and consulting, with specifics depending on the agreement. |
| Virtualization | Virtualization accesses disparate on-premises or cloud data without moving or copying it. | Its virtualization layer lets users access and query data from multiple sources through a unified database view. |
| What it does | Stardog is a semantic AI and enterprise knowledge-graph platform that unifies data and adds business context for analytics, applications and AI. | Virtuoso combines data-access middleware, a multi-model database, data integration, data virtualization, knowledge-graph functions, and an HTTP application server. |
Plans
Stardog
- Stardog Cloud FreeFree
- Stardog FreeFree
- Stardog FreeFree
- Stardog Cloud EnterprisePriced on request
- Stardog EnterprisePriced on request
Virtuoso Universal Server
- Personal$99.99 a year
- Personal$99.99, paid once
- Developer$199 a year
- Developer$199, paid once
- Project$499, paid once
- Project$499 a year
- EnterprisePriced on request
In their own words
Virtuoso Universal Server
Virtuoso Universal Server is a multi-model database management system and HTTP-based application server for working with data from different sources. It supports relational SQL data, RDF, SPARQL, XML, JSON, and web services. A virtualization layer lets users query multiple sources through a unified database view, with connections through HTTP, ODBC, and JDBC. Listed standards include SQL, SPARQL, GraphQL, and RDF. The product has open-source and commercial licenses; the open-source version is under GPL. Commercial licensing adds advanced security, custom reasoning and inference, high-availability replication, and professional support. The maker describes fine-grained attribute-based access controls and lists encryption at rest as a commercial feature. Deployment options include Linux/Unix, Docker, Windows, and macOS installations, as well as on-premises/BYOL, AWS, and Azure. The maker lists data integration, governance, knowledge management, data productization, and AI-driven customer support as typical uses. Personal, Developer, and Project workstation licenses cost $99.99 as a one-time purchase, $199, paid once, and $499, paid once, respectively. OpenLink Software, the privately held maker, was founded in 1992.