--- title: "Virtuoso — Loosely Coupling AI and Data Spaces" description: "Virtuoso: one engine, governed by you, letting MCP- and LLM-based AI agents query SQL, knowledge graphs, files, and APIs — harmonized and access-controlled, never duplicated." url: urn:osdi:this dateModified: 2026-11-04T23:14:55Z language: en --- "Free 30-Day Trial": Virtuoso Enterprise Edition client-and-server bundles in Finder-style columns (operating system > platform > version, 7 and later), then details and the license generator's link (virtuoso-generate.vsp). The options come straight from https://www.openlinksw.com/sparql (data-sparql-endpoint); the skin's js/try-lite.js drives the modal. Without script, the button above is a link to the generator's form. ## Start Your Virtuoso Trial 1. Select 2. Details 3. Sign in 4. Download Virtuoso Enterprise Edition, client and server: choose an operating system, its version and a Virtuoso version. Operating System Operating System Version Version Email Address Receive marketing material **Note:** This link opens OpenLink's license generator, which issues your trial license and installer download. You will need to log in if you haven't already done so; if you don't have an account, you'll need to create one on the next page. [Get Trial License & Download](#) Universal Server for Data Spaces & AI Agents # Virtuoso Loosely coupling AI and data spaces *— without compromise.* One engine, governed by you, that lets agents built on MCP, LLMs, and enterprise apps query SQL, knowledge graphs, files, and APIs — harmonized, access-controlled, never duplicated. See an Agent Query a Data Space → Pricing Free 30-Day Virtuoso Trial Guides menu from the full-monty review site (2026-10-15). Its "View Demos" link goes to a Content Explorer page this site does not have, so it is left out. Guides Installation Linux/Unix Docker Windows macOS Nexus Repository Cloud Marketplaces Virtuoso SaaS on AWS (new) Amazon Web Services (AWS) Microsoft Azure Cloud Google Cloud Platform (GCP) Developer Guides Documentation entries open in a new tab so the Virtuoso page stays put (user, 2026-11-02). One entry per documentation root in /DAV/docs2/vos/ (vector-index, fuzzy-search, gql, graph-analytics). Vector Index has its own pages on this site; the other three are single-page apps served from WebDAV by rewrite rules on the live host (live-20261031-flip/24-docs-rules-www.sql). The trailing slash matters: the app loads its pages relative to the address, so without it nothing loads. Knowledge Graph Developer Guide Vector Index Documentation Fuzzy Search Documentation GQL Documentation Graph Analytics Documentation What the animation shows **Disparate data spaces, one harmonized view.** Databases, filesystems, APIs and knowledge bases, each in its own shape: its own format, schema and protocol. **Ontologies for Context.** Terms such as schema:Person tell Virtuoso what each record means. **RDF Views for Virtual Graphs.** Each source becomes a Virtual Graph: the data stays in place. **Hyperlink identifiers join the same entity.** Records from different sources become one connected knowledge graph. **SQL, SPARQL, GQL and GraphQL over the same Knowledge Graph.** One graph, four ways in; the answer joins every data space. **Harmonized: one knowledge graph, shared meaning.** Ontologies give context, Virtual Graphs keep data in place, hyperlinks connect it. [Open the full-size animation](http://localhost:8890/skin-openlink-2026/img/native/virtuoso-harmonization.svg) MCP Native Agent Skills for both platform admin and use ABAC Governance informed by Agent & User Identity Tables & Graphs One Engine, Many Models & Query Languages HyperData Hyperlink-based Super-Keys across Silos Zero‑Copy Data Stays Put "Why Virtuoso?", ported from production (virtuoso.openlinksw.com; static markup there too, website-matrix/virtuoso/live/index.html, section "Introduction"). The three headings and their sentences are production's, verbatim; the lede is production's FAQ ("It is cross-platform, high-performance, scalable, and secure", virtuoso-faq-top-questions.ttl). The points under each are feature names from production's own data: the feature graph behind the edition matrix below (virtuoso-features-matrix.ttl) and the per-plan comparison on production's /pricing/ (Replication Clustering, Column-Wise Storage). The pills name the same features. Four of them are Commercial-only in that matrix (high availability cluster via replication, attribute-based access controls, encryption at rest, RDF Views over external data sources), hence the note under the cards. Why Virtuoso ## Why Virtuoso? Virtuoso is cross-platform, high-performance, scalable, and secure. Vectored · Column Store ### High Performance Experience unparalleled speed and efficiency in data processing and queries. - Vectored execution - Column-wise data storage, with data compression - Parallelized SQL query execution - Intelligent query optimization SQL · NoSQL · Linked Data ### Universal Connectivity Connect and integrate diverse data sources including SQL, NoSQL, and Linked Data. - Open standards: HTTP, ODBC, JDBC, SQL, SPARQL, GraphQL - Linked Data Views over native SQL and external data sources - Web services to RDF Linked Data Replication · ABAC ### Scalable & Secure Built for enterprise-grade scalability and robust security for your critical data. - High-availability clustering via replication - Network-based query parallelization - Distributed transactions with two-phase commit - Attribute-based access controls and encryption at rest Replication clustering, attribute-based access controls, encryption at rest and RDF Views over external sources are Commercial Edition features; see the [edition comparison matrix](#edition-matrix). Native to the server, not bolted on ## One engine, five capabilities converged Data Spaces management isn't a feature Virtuoso added on top of a database. A multi-model DBMS, a knowledge base, an HTTP application server, a document/file server, and a data-virtualization layer have shared one transaction manager, one security model, and one query engine since day one — not five products glued together at the API. virtuoso-harmonization-animation:start virtuoso-harmonization-animation:end RDBMS ### Multi-Model DBMS Relational tables, property graphs, and document collections in one transactional engine — one backup, one security model, no sync job keeping them consistent. RDF · SPARQL ### Knowledge Base / Graph A native RDF quad store with SPARQL 1.1, built-in inference, and full-text search — not a triple store bolted on beside the database. VSP · REST · SOAP ### HTTP Application Server An integrated web and application server runs directly against the data engine — pages, REST endpoints, and SOAP services with no separate app-server tier to deploy or patch. WebDAV ### Document / File Server A built-in, ACL'd, versioned file and document store lives alongside your structured and graph data — queryable, not just hosted. R2RML · RDF Views ### Data Virtualization External SQL, NoSQL, and API sources map in as virtual tables or RDF Views — federated into the same queryable layer without copying them out of the systems that already own them. personas:begin (build_personas.py) Personas ## Built for your role Virtuoso Universal Server delivers tailored capabilities for every data professional. ### Build smarter apps on a unified data platform Build and ship applications against SQL, SPARQL, and REST endpoints from a single hybrid data engine with open standards, extensive tooling, and scalable deployment. Developer: Build smarter apps on a unified data platform ### Connect complex systems efficiently Integrate heterogeneous data spaces (databases, knowledge bases, filesystems, and APIs), streamline information flow across platforms, and reduce friction in complex enterprise data environments. Data Integration Engineer: Connect complex systems efficiently ### Deliver better analytical insight Unify governed data across sources, improve context for reporting and dashboards, and support more consistent enterprise decision-making. Analytics Practitioner: Deliver better analytical insight ### Unify enterprise data architecture Connect siloed data, model shared meaning across systems, and create a scalable foundation for analytics, AI, and interoperability. Enterprise Data Architect: Unify enterprise data architecture ### Build knowledge graphs with confidence Model, query, and manage semantic data at scale for knowledge graphs that support discovery, reasoning, and enterprise-wide reuse. Knowledge Graph Architect: Build knowledge graphs with confidence ### Govern data with shared context Link data, definitions, and stewardship processes in a trusted layer that improves consistency, accountability, and policy alignment. Data Governance Practitioner: Govern data with shared context ### Improve sourcing visibility and control Connect supplier, contract, and policy data for better transparency, stronger governance, and more informed sourcing decisions. Procurement Practitioner: Improve sourcing visibility and control ### Powerful Security, Observability, and Auditability Construct and deploy fine-grained, attribute-based access control (ABAC), informed by an ontology, to enforce data, information, and knowledge access policies that constrain both humans and AI agents operating on their behalf. Security & Compliance Practitioner: Powerful Security, Observability, and Auditability ### Connect research and knowledge assets Organize linked research data, metadata, and digital collections in a semantic environment built for discovery, reuse, and interoperability. Research Data Architect: Connect research and knowledge assets personas:end Proof, not promise ## What “loosely coupled” gets you in production Every claim in the headline maps to a shipped capability — not a roadmap item. MCP · OpenAPI · Stored Procs ### Agent Skills without a rewrite - Agents call stored procedures, external APIs, and MCP-enabled systems as composable skills - No new integration layer to build or maintain ABAC · Ontology-Driven ### Agent identity, separate from yours - Fine-grained access control constrains what an agent can see and do - Independent of the human it's acting for R2RML · RDF Views ### Harmonization, not migration - Tables, graphs, files, and APIs mapped into one semantic model in place - Nothing copied or re-platformed to be queried together Solid · Self-Sovereign ### Session data stays user-owned - Session state can dereference to a user's own Pod - Agent interactions don't quietly become another system of record How the coupling stays loose ## Three steps, no data movement 01 — Connect Attach sources as-is SQL, NoSQL, RDF, filesystems, and HTTP/ODBC/JDBC endpoints connect where they already live — on-prem or cloud. 02 — Harmonize Map to one semantic layer R2RML and RDF Views give every source a shared vocabulary, so a query can span silos without ETL. 03 — Govern & Serve Expose to agents under ABAC AI agents, LLMs, and apps query the harmonized layer through SQL, SPARQL, or REST — each call scoped by identity. Built for your role ## The same server, a different entry point Five roles, one engine underneath — each gets a different reason to care. ### Knowledge Graph Architect Ship a knowledge graph agents can actually use — native reasoning and identity reconciliation built in, not bolted on. SELECT ?agent ?scope WHERE { ?agent a ai:Agent ; abac:hasScope ?scope . ?scope abac:grants virt:DataSpace . } ### Data Integration Engineer Map tables and APIs into the graph once, with R2RML, instead of maintaining N point-to-point ETL jobs per consumer. ### Governance Practitioner Enforce ABAC rules once, centrally, and have every SQL, SPARQL, and REST caller — human or agent — obey them identically. ### Developer Query the same harmonized layer through SQL, SPARQL, or GraphQL — pick the query language that fits the app, not the data silo. ### Enterprise Architect Deploy on-prem, or in the cloud via the AWS and Azure marketplaces (pay-as-you-go or bring your own license) — one engine to govern instead of a sprawl of point connectors. KEY FEATURES & BUSINESS IMPACT, production's section of that name, in the same place (before the edition matrix), from the same graph by the same query (website-matrix/virtuoso/live/index.html, features-benefits-query): each oplfeat:ProductFeature in virtuoso-features-and-benefits.ttl with its description and its oplben:hasBenefit names. Federated to www.openlinksw.com/sparql like the FAQ and matrix, which serves that graph (checked 2026-10-15: 4 features, 15 benefits). The benefits come back as one "; "-separated value, as production's GROUP_CONCAT does with "|||", so the card reads as a sentence; js/virtuoso-page.js turns it into a list. Key features ## Key Features & Business Impact Discover how Virtuoso's advanced features deliver measurable business value. The key features could not be loaded just now. In the meantime, see the [edition comparison matrix](#edition-matrix) or the [Virtuoso documentation](https://docs.openlinksw.com/virtuoso/). The /virtuoso sections the production site (virtuoso.openlinksw.com) has and this page lacked, in the production order: Virtuoso Edition Comparison Matrix, Get Started in Minutes, Flexible Pricing & Deployment, Frequently Asked Questions, Resources & Support. Inserted by build_content.py in place of the single pricing section the design carried. Every offer card carries an id, its offer IRI fragment (offer-personal, offer-docker-personal, offer-aws-pago, offer-gcp-byol, ...), and every section and tab panel has one, so each can be linked directly; js/edition-tabs.js opens the tab that holds the target. PRICING is one tabbed block: "On-Premise" (the four published tiers, from rdf/virtuoso-pricing.ttl) as "On-Premise (Installers)" and, as its own tab, "On-Premise (Docker Containers)" (the same four licenses, bring your own, applied to the Docker installation), then a tab per cloud (AWS, Azure, Google Cloud). A cloud's PAGO and BYOL offers are alternatives side by side on its tab (BYOL is a cloud modality, not an on-premise one). Offers are told apart by oplsite:provider; each list is its own data source. js/edition-tabs.js does the tabs, and without script every list shows under its own heading. THE COMPARISON MATRIX is a query too, the production page's own: every ProductFeature in the feature graph (less three clustering entries it leaves out), crossed with the two products in virtuoso-features-matrix.ttl ("Virtuoso 8.x" is Commercial, the other Open Source), tick 1 where the product lists the feature. It is run through the federated endpoint with STR() on the label, since a language-tagged literal fails passing through SERVICE here (SR549). js/matrix-table.js pivots the rows into the table (open-source-less features first, then by name, six shown and the rest behind "Show More"). THE FAQ is not authored here. The query below is executed by the engine at render time, scoped to the five named graphs that hold the production FAQ (each category is the graphs it comes from), and js/faq-tabs.js turns the result into category tabs over an accordion. It is federated to www.openlinksw.com/sparql like /posts, so an unreachable endpoint renders the empty state rather than failing the page. The remote projects STR() of the question and answer: both are rdf:langString literals, and passing those through SERVICE fails here with SR549 ("Both datatype id and language id are not default"), which renders as no rows at all. Editions ## Virtuoso Edition Comparison Matrix Compare features across different Virtuoso editions to find the perfect fit for your needs. The comparison could not be loaded just now. In the meantime, see the [Virtuoso documentation](https://docs.openlinksw.com/virtuoso/). Installation Guides ## Get Started in Minutes Choose your platform and follow our step-by-step installation guides. ### Linux/Unix Install Guide → ### Docker Install Guide → ### Windows Install Guide → ### macOS Install Guide → Also available via [Nexus Repository](urn:osdi:sitehowto/install/nexus/) for Linux environments. Pricing & Deployment ## Flexible Pricing & Deployment Choose the deployment model that fits your infrastructure and budget: on-premise (installers or Docker containers, the same licenses), or on any of the three major clouds, each with pay-as-you-go (PAGO) or bring-your-own-license (BYOL) options. ### On-Premise (Installers) Full control: install Virtuoso natively on your own infrastructure (Linux/Unix, Windows or macOS); see the [installation guides](urn:osdi:sitehowto/install/linux/) above. ### Personal For individual use on a workstation. - 2 Concurrent Sessions - 2 CPU Core Affinity - Linux, Windows, macOS Workstation - $8 per month equivalent $99.99/yr Add to Cart→ ### Developer For application development against a wider core count. - 5 Concurrent Sessions - 8 CPU Core Affinity - Linux, Windows, macOS Workstation - $17 per month equivalent $199/yr Add to Cart→ ### Project For project work needing the full workstation core count. - 5 Concurrent Sessions - 16 CPU Core Affinity - Linux, Windows, macOS Workstation - $42 per month equivalent $499/yr Add to Cart→ ### Need More? Tailored to your needs. - Unlimited Concurrent Sessions - Unlimited CPU Cores - Server-Grade Operating Systems - Enterprise Support - Custom Licensing Terms Custom Contact Sales→ Prices are those published at virtuoso.openlinksw.com at time of writing. Confirm current pricing before purchase. ### On-Premise (Docker Containers) The same licenses, bring-your-own-license (BYOL), applied to the Docker installation. See the [Docker installation guide](urn:osdi:sitehowto/install/docker/). ### Personal For individual use on a workstation. - 2 Concurrent Sessions - 2 CPU Core Affinity - Linux, Windows, macOS Workstation - $8 per month equivalent $99.99/yr Add to Cart→ ### Developer For application development against a wider core count. - 5 Concurrent Sessions - 8 CPU Core Affinity - Linux, Windows, macOS Workstation - $17 per month equivalent $199/yr Add to Cart→ ### Project For project work needing the full workstation core count. - 5 Concurrent Sessions - 16 CPU Core Affinity - Linux, Windows, macOS Workstation - $42 per month equivalent $499/yr Add to Cart→ ### Need More? Tailored to your needs. - Unlimited Concurrent Sessions - Unlimited CPU Cores - Server-Grade Operating Systems - Enterprise Support - Custom Licensing Terms Custom Contact Sales→ Prices are those published at virtuoso.openlinksw.com at time of writing. Confirm current pricing before purchase. ### Amazon Web Services Virtuoso on Amazon Web Services comes in two categories: virtual machines (AMIs) that you run yourself, and a managed SaaS that OpenLink runs for you. #### Virtual Machines (AMIs) Virtuoso as a pre-configured Amazon Machine Image on an instance in your AWS account: pay-as-you-go (PAGO), or bring your own license (BYOL). 30-day free trial ### Pay-As-You-Go (PAGO) Cloud-hosted Virtuoso Enterprise Edition as an Amazon Machine Image: an unlimited license with CPU Affinity pegged to the host instance type, so cost rises with CPU Affinity for an unrestricted number of users or connections. - Virtuoso 08.03.3335 on Ubuntu 24.04 (64-bit x86 AMI) - $0.348/hour on r5.xlarge (recommended), up to $7.10/hour on x1e.32xlarge - 365-day contract: save up to 35% - AWS infrastructure costs may apply From $0.348/hour AWS Marketplace→ AWS Free Tier ### Bring Your Own License (BYOL) Virtuoso as a pre-configured Amazon Machine Image. Pricing and entitlements are managed outside AWS Marketplace: you activate it with a license purchased from OpenLink, and AWS provides the infrastructure. - Virtuoso 08.03.3335 on Ubuntu 24.04 (64-bit x86 AMI) - License bought outside AWS Marketplace; cancelling the subscription does not affect it - AWS infrastructure costs may apply BYOL AWS Marketplace→ #### Managed SaaS Virtuoso SaaS Single Server: OpenLink provisions, operates and supports a dedicated single-server Virtuoso instance. Choose a 12, 24 or 36-month contract. Prices start with the Developer size and rise with larger sizes, all on the AWS Marketplace listing. New ### 12-Month Contract Virtuoso SaaS Single Server: a managed, dedicated single-server Virtuoso instance that you provision and manage from the Virtuoso Buyer Portal, with HTTPS and TLS SQL access, backups and lifecycle operations. OpenLink operates and supports it. - Starts with the Developer size; larger sizes are on the AWS Marketplace listing - Standard OpenLink support and managed service maintenance included - Extra storage $0.50 per GB-month; extra data transfer $0.10 per GB - Additional AWS infrastructure costs may apply From $1,393for 12 months AWS Marketplace→ Save up to 6% ### 24-Month Contract The same managed Virtuoso SaaS Single Server on a 24-month contract, paid up front or in installments under your contract terms. - Starts with the Developer size; larger sizes are on the AWS Marketplace listing - Standard OpenLink support and managed service maintenance included - Extra storage $0.50 per GB-month; extra data transfer $0.10 per GB - Additional AWS infrastructure costs may apply From $2,632for 24 months AWS Marketplace→ Save up to 11% ### 36-Month Contract The same managed Virtuoso SaaS Single Server on a 36-month contract, paid up front or in installments under your contract terms. - Starts with the Developer size; larger sizes are on the AWS Marketplace listing - Standard OpenLink support and managed service maintenance included - Extra storage $0.50 per GB-month; extra data transfer $0.10 per GB - Additional AWS infrastructure costs may apply From $3,715for 36 months AWS Marketplace→ Prices are those listed on the AWS Marketplace at time of writing; cloud infrastructure charges are separate. Confirm current pricing on the listing before purchase. ### Microsoft Azure Two ways to run Virtuoso on Microsoft Azure: pay-as-you-go (PAGO), or bring your own license (BYOL). ### Pay-As-You-Go (PAGO) Cloud-hosted Pay-As-You-Go edition as a virtual machine: an unlimited license with CPU Affinity pegged to the host VM instance type, so cost rises with CPU Affinity for an unrestricted number of users or connections. - Virtuoso 08.03.3335 on Ubuntu 24.04 (virtual machine) - $0.348/hour plus Azure infrastructure costs - Costs vary by deployment region From $0.348/hour Azure Marketplace→ ### Bring Your Own License (BYOL) Virtuoso delivered as a pre-installed, pre-configured virtual machine. It requires a product license acquired beforehand: entry-level licenses are sold online (see the On-Premise tabs), or contact your account manager. - Virtuoso 08.03.3335 on Ubuntu 24.04 (virtual machine) - Bring your own license - Plus Azure infrastructure costs; these vary by deployment region BYOL Azure Marketplace→ Prices are those listed on the Azure Marketplace at time of writing; cloud infrastructure charges are separate. Confirm current pricing on the listing before purchase. ### Google Cloud Two ways to run Virtuoso on Google Cloud: pay-as-you-go (PAGO), or bring your own license (BYOL). ### Pay-As-You-Go (PAGO) Virtuoso as a pay-as-you-go virtual machine on Google Compute Engine. The license fee follows the number of vCPUs of the VM you instantiate, and the configuration can be changed when deploying. - Virtuoso on Ubuntu, single VM (x86_64) - License fee shown for the default 2 vCPU, 8 GB VM (n2d-standard-2) - Infrastructure about $52.88/month on top, for a total of about $306.92/month (Central US, 50 GB SSD, after sustained use discount) - New Google Cloud customers may be eligible for a free trial $254.04/month Google Cloud Marketplace→ ### Bring Your Own License (BYOL) Virtuoso as a virtual machine on Google Compute Engine. A valid license is required: you buy and manage it with OpenLink Software, and it is priced by concurrent connections and the logical processors of the environment. - Virtuoso on Ubuntu, single VM (x86_64) - License fee varies; Google does not collect it - Infrastructure about $52.88/month for the default 2 vCPU, 8 GB VM (Central US, 50 GB SSD, after sustained use discount) - New Google Cloud customers may be eligible for a free trial BYOL Google Cloud Marketplace→ Prices are those listed on the Google Cloud Marketplace at time of writing; cloud infrastructure charges are separate. Confirm current pricing on the listing before purchase. FAQ ## Frequently Asked Questions Find answers to common questions about Virtuoso. The questions could not be loaded just now. In the meantime, see the [Virtuoso documentation](https://docs.openlinksw.com/virtuoso/). Resources ## Resources & Support Everything you need to succeed with Virtuoso. ### Help & Support - [Community Forum](https://community.openlinksw.com/) - [Documentation](https://docs.openlinksw.com/virtuoso/) - [Support Portal](https://support.openlinksw.com/) - [Open Support Case](https://shop.openlinksw.com/support_system/customers/) ### Latest Updates Stay informed about new features, releases, and industry insights. View News → ### Get in Touch Request a personalized demo or start your free trial. - [Request Demo](urn:osdi:sitecontact/) - [Free Trial](https://shop.openlinksw.com/onboarding/) ### Documentation Comprehensive guides and API references. - [Vector Index Documentation](urn:osdi:sitevirtuoso/docs/vector-index/) - [Browse Docs →](https://docs.openlinksw.com/virtuoso/) "Part of VOICE" band for the Virtuoso and OPAL pages (user-approved 2026-10-28): a cross-link, not a second description of VOICE, which lives on its own page. Links are authored slash-less; relink_content.py resolves them. Part of VOICE ## Virtuoso, OPAL, and LOAM, working as one VOICE (Virtuoso Open Interoperable Context Engine) pairs federated data access and semantic context with an agent harness and persistent memory (LOAM, Linked Open Agent Memory), so any agent and any LLM can work across the Data Spaces you already have. [Explore VOICE →](urn:osdi:sitevoice/) Ready when your data is ## Give your agents a governed way in Deploy on-prem, or in the cloud via the AWS and Azure marketplaces (pay-as-you-go or bring your own license) — start querying real data spaces today. [Talk to an Architect](urn:osdi:sitecontact/) [View Pricing](#pricing)