Ontop vs Virtuoso Universal Server
| Ontop | Virtuoso Universal Server | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | Yes |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Windows, macOS, Linux | api, Linux, macOS, self-hosted, Web, Windows |
| Ontology modeling | Yes | — |
| Semantic reasoning | Yes | — |
| RDF/SPARQL support | Yes | — |
| Import formats | RDF/XML, Turtle, N-Triples, N-Quads, TriG, JSON-LD, R2RML, Ontop mapping format | — |
| Deployment | both | both |
| Query languages | SPARQL | — |
Both are listed in Best Knowledge Graph Software, Best Data Virtualization Software. On Inferse, Virtuoso Universal Server scores higher on our published basis.