No. 15 of 33 ·Knowledge Graph Software

Virtuoso Universal Server

Name: Virtuoso Universal Server
Price: 99.99 USD

Web · Windows · Mac · Linux · Self-hosted · API

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Freedom report

Two barsScore 5.6

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely4 of 6 device platforms
DocumentedPlans, terms and facts published

Virtuoso Universal Server is ranked #15 of 33 in knowledge graph software on Freedom251. It runs on API, Linux, macOS, Self-hosted, Web, Windows. A free trial is offered.

Virtuoso Universal Server plans and pricing

All plans

Personal $99.99 once 2 concurrent users · 2 CPU cores · Linux, Windows, macOS · Workstation virtuoso.openlinksw.com · 30 Sept 2026

Developer $199 once 5 concurrent users · 8 CPU cores · Linux, Windows, macOS · Workstation virtuoso.openlinksw.com · 30 Sept 2026

Project $499 once 5 concurrent users · 16 CPU cores · Linux, Windows, macOS · Workstation virtuoso.openlinksw.com · 30 Sept 2026

Enterprise Not published Unlimited concurrent sessions · Unlimited CPU cores · Server-grade operating systems · Enterprise support · Custom licensing terms virtuoso.openlinksw.com · 30 Sept 2026

Compared on knowledge graph software

Free plan: Yes
Deployment model: hybrid
Semantic layer: Yes
Access protocols: SQL, SPARQL, XQuery, XPath, ODBC, JDBC, UDBC, OLE DB, SOAP, REST, HTTP
REST API access: Yes
Query acceleration: Yes

Best Virtuoso Universal Server alternatives

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Two bars RDFox Free tier No. 1Free6.7 Two bars AllegroGraph Free tier No. 2Free6.6 Two bars Eclipse RDF4J Free tier No. 3Free6.6 Two bars GraphDB Free tier No. 4Free6.6 Two bars Protégé Free tier No. 5Free6.6 Two bars RDF Studio Free tier No. 6Free6.6

The record

Product: Virtuoso is a multi-model DBMS and HTTP-based application server that provides access to disparate data sources.
Data models: Virtuoso supports relational SQL data, RDF, SPARQL, XML, JSON, and web services.
Virtualization: Its virtualization layer lets users access and query data from multiple sources through a unified database view.
Protocols and integrations: The platform connects to external data sources through HTTP, ODBC, and JDBC and supports standards including SQL, SPARQL, GraphQL, and RDF.
Security: The maker describes fine-grained attribute-based access controls and lists encryption at rest as a commercial feature.
Licensing: The maker offers open-source and commercial licenses; its pricing page says the open-source version is under GPL.
Commercial features: Commercial licensing includes advanced security, custom reasoning and inference, high-availability replication, and professional support.
Support: Commercial support can include bug fixes, feature enhancements, performance tuning, and consulting, with specifics depending on the agreement.
Deployment: The maker provides installation guides for Linux/Unix, Docker, Windows, and macOS, and describes on-premises/BYOL, AWS, and Azure deployment options.
Scaling: The maker says a single-server deployment can scale beyond 100 billion RDF triples, with Elastic Cluster Edition available for higher demands.
Typical use cases: The maker lists AI-driven customer support, enterprise knowledge management, data governance, data productization, and data integration as typical use cases.
Company: OpenLink Software is a privately held company founded in 1992.
Founded: 1992

Where it ranks on Freedom251

Best Knowledge Graph Software in 2026#15 of 33
Best Spatial Databases in 2026#22 of 32
Best Multimodel Databases in 2026#16 of 26
Best RDF Databases in 2026#12 of 26
Best Data Virtualization Software in 2026#12 of 23

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Sources

virtuoso.openlinksw.com· checked 30 Sept 2026
virtuoso.openlinksw.com/pricing/· checked 30 Sept 2026
openlinksw.com/company/· checked 30 Sept 2026