Virtuoso Universal Server
The facts below are what the maker publishes about Virtuoso Universal Server, checked and dated. Our editors have not written about it yet.
Plans and prices
From Virtuoso Universal Server's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Personal | $99.99 a year | 2 concurrent sessions · 2 CPU core affinity · Linux, Windows, macOS · workstation · per year ($8 per month) |
| Developer | $199 a year | 5 concurrent sessions · 8 CPU core affinity · Linux, Windows, macOS · workstation · per year ($17 per month) |
| Project | $499 a year | 5 concurrent sessions · 16 CPU core affinity · Linux, Windows, macOS · workstation · per year ($42 per month) |
| Enterprise | Priced on request | Unlimited concurrent sessions · unlimited CPU cores · server-grade operating systems · enterprise support · custom licensing terms · Custom |
The facts
Each one read from Virtuoso Universal Server's own pages, with the date it was checked.
What it does
- API extensibility
- Custom data sources can be added through a server extensions API, and C plugins can add SQL functions while Java and .NET methods can be called from SQL.checked 15 Oct 2026
- Commercial features
- Commercial licensing includes advanced security, custom reasoning and inference, high-availability replication, and professional support.checked 30 Sep 2026
- Commercial-license benefits
- The pricing page lists OWL/RDFS and SPIN inference, ABAC security, business intelligence, replication clustering, ODBC virtualization, and column-wise storage across paid workstation plans.checked 15 Oct 2026
- Connectivity standards
- Supported client access includes ODBC, JDBC, OLE DB, ADO.NET, XMLA, SPARQL Protocol, Jena, Sesame, RDF4J, Redland, and Linq2Rdf providers.checked 15 Oct 2026
- Data models
- The platform manages relational SQL, RDF, XML, JSON, document, and free-text data in one server.checked 15 Oct 2026
- Deployment
- The open-source edition provides installers for Linux, macOS, and Windows, Docker instructions, and source builds for those operating systems.checked 15 Oct 2026
- Distributed optimization
- The query planner uses locality-sensitive cost optimization, pass-through queries, array parameters, latency estimates, and hash joins for remote data.checked 15 Oct 2026
- Documentation depth
- Official documentation includes manuals and wiki material for Virtuoso, the open-source edition, the Virtuoso Authentication Layer, and Java provider APIs.checked 15 Oct 2026
- Download requirements
- The download page states that Linux binaries target glibc 2.5 or newer, macOS installers support Mavericks 10.9 and later, and Windows has a standard installer.checked 15 Oct 2026
- Federated queries
- SQL, SPARQL, and XQuery/XPath queries can run across remote SQL, RDF, XML, and web-service sources.checked 15 Oct 2026
- Inference
- The product supports OWL/RDFS and SPIN reasoning and inference, including subclass, subproperty, sameAs, equivalent-class, and equivalent-property relationships.checked 15 Oct 2026
- Java SDKs
- OpenLink publishes Java API documentation for Virtuoso Jena, Sesame, and RDF4J providers in several versions.checked 15 Oct 2026
- License
- Virtuoso Open-Source Edition is licensed under GNU GPL version 2; commercial editions use proprietary licensing.checked 15 Oct 2026
- License confusion complaint
- An OpenLink community user reported difficulty selecting the right license and trouble reconnecting to Conductor after an evaluation license expired.checked 15 Oct 2026
- Licensing
- The maker offers open-source and commercial licenses; its pricing page says the open-source version is under GPL.checked 30 Sep 2026
- Limit: complexity
- Bloor Research says Virtuoso is complex and that OpenLink does not explain clearly enough what the product is or where it has advantages.checked 15 Oct 2026
- Limit: support and installation
- G2 reviewers report weak user or community support and say installation can be difficult.checked 15 Oct 2026
- Praise: multi-model breadth
- Bloor Research describes Virtuoso as combining relational tables, RDF property graphs, XML and JSON documents, SPARQL-to-SQL access, and SOAP/REST web serving.checked 15 Oct 2026
- Praise: RDF and SQL familiarity
- G2 reviewers praise RDF storage and say people familiar with SQL can learn the product more easily.checked 15 Oct 2026
The company
- Company
- OpenLink Software is a privately held company founded in 1992.checked 30 Sep 2026
- Company headquarters
- LinkedIn lists OpenLink Software headquarters in Needham, Massachusetts, with 11–50 employees and a 1992 founding year.checked 15 Oct 2026
- Company legal identity
- Crunchbase lists the legal name as OpenLink Software, Inc., a privately held for-profit company founded by Kingsley Idehen.checked 15 Oct 2026
- Company profile
- OpenLink's own company page says it was founded in 1992 by President and CEO Kingsley Idehen and develops data-access, virtualization, multi-model database, and web middleware technologies.checked 15 Oct 2026
- Founded
- 1992checked 28 Sep 2026
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