Ontop vs Virtuoso Universal Server
Ontop
ontop-vkg.orgVirtuoso Universal Server
virtuoso.openlinksw.comSide by side
| Figure | Ontop | Virtuoso Universal Server |
|---|---|---|
| Price from | — | $8.33/mo |
| Free plan | — | — |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 0 | 7 |
| Spec score · Data Virtualization Software | 7.9 (#11) | 8.4 (#8) |
| Spec score · Knowledge Graph Software | 7.8 (#20) | 8.5 (#9) |
| Deployment | Ontop can be deployed as a SPARQL endpoint using its command-line interface or Docker image. | The open-source edition provides installers for Linux, macOS, and Windows, Docker instructions, and source builds for those operating systems. |
| License | Ontop is available under the Apache 2.0 license. | Virtuoso Open-Source Edition is licensed under GNU GPL version 2; commercial editions use proprietary licensing. |
| Product | Ontop is a Virtual Knowledge Graph system that exposes relational database content as knowledge graphs while leaving data in its source databases. | Virtuoso is a multi-model DBMS and HTTP-based application server that provides access to disparate data sources. |
Plans
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.