Best Ontop Alternatives in 2026
Updated
20 tools from knowledge graph software ranked against Ontop on the same published basis.
- 1Ontop vs RDFox
- 2Ontop vs AllegroGraph
- 3Ontop vs GraphDB
- 4Ontop vs RDF Studio
- 5Ontop vs Stardog
- 6Ontop vs TypeDB
- 7Ontop vs Neo4j
- 8Ontop vs Protégé
- 9Ontop vs Virtuoso Universal Server
- 10Ontop vs Apache Jena Fuseki
- 11Ontop vs Eclipse RDF4J
- 12Ontop vs LinkedDataHub
- 13Ontop vs Progress Semaphore
- 14Ontop vs TerminusDB
- 15Ontop vs Timbr
- 16Ontop vs Mendix
- 17Ontop vs OWLGrEd
- 19Ontop vs HASH
- 20Ontop vs PoolParty Semantic Suite
- 21Ontop vs Mondeca
Ontop alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | RDFox | 7.9 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 2 | AllegroGraph | 7.5 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 3 | GraphDB | 7.5 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 4 | RDF Studio | 7.5 | Free plan | Free | API, Linux, Mac, Web, Windows |
| 5 | Stardog | 7.4 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 6 | TypeDB | 7.4 | Free plan | $0.07/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 7 | Neo4j | 7.3 | Free plan | $65/mo | self-hosted |
| 8 | Protégé | 7.3 | Free plan | Free | Linux, Mac, Web, Windows |
| 9 | Virtuoso Universal Server | 7.3 | No | — | API, Linux, Mac, self-hosted, Web, Windows |
| 10 | Apache Jena Fuseki | 7.1 | Free plan | Free | API, Linux, self-hosted, Web, Windows |
| 11 | Eclipse RDF4J | 7.1 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 12 | LinkedDataHub | 7.1 | Free plan | Free | API, Linux, self-hosted, Web |
| 13 | Progress Semaphore | 7.1 | No | — | API, Linux, self-hosted, Web, Windows |
| 14 | TerminusDB | 7.1 | Free plan | Free | API, Linux, self-hosted, Web |
| 15 | Timbr | 6.9 | No | — | API, Linux, self-hosted, Web |
| 16 | Mendix | 6.7 | Free plan | Free | — |
| 17 | OWLGrEd | 6.5 | Free plan | Free | Web, Windows |
| 19 | HASH | 6.1 | Free plan | $1.67/mo | API, Browser, self-hosted, Web |
| 20 | PoolParty Semantic Suite | 6.1 | No | — | Web |
| 21 | Mondeca | 6.0 | No | — | Web |
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Questions about Ontop alternatives
What is the best alternative to Ontop?
RDFox, number 1 in knowledge graph software with a score of 7.9 out of 10. The others here: AllegroGraph, GraphDB, RDF Studio and 16 more.
What is the best free alternative to Ontop?
RDFox is the best-ranked alternative with a free plan. 15 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.