Best Knowledge Graph Software in 2026
Updated
In short: AllegroGraph is ranked #1 of 33 as of 4 October 2026, ahead of GraphDB and Protégé. The best-ranked option with a free plan is GraphDB. The lowest first paid tier on this page is TypeDB at $0.07/mo.
When your data is linked by relationships, knowledge graph software can help you represent and work with those connections. Compare ontology modeling and graph visualization, then check the import formats and query languages each entry lists. RDF/SPARQL support and semantic reasoning offer additional points to consider when assessing how you will work with graph data. Deployment options, free-plan availability, and paid-from pricing round out the comparison. GraphDB, AllegroGraph, and Stardog lead the ranking, with Eclipse RDF4J and Apache Jena Fuseki also among the early entries. Use the listed formats, modeling features, and query capabilities to weigh which tools fit your data and preferred workflows.
33 knowledge graph software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 AllegroGraph Top pick · 7.3 Free plan · Free #2 GraphDB Runner-up · 7.3 Free plan · Free
#3 Protégé Also great · 7.3 Free plan · Free- Free plan apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Free plan LinuxmacOSWebWindows
- Free plan
- Yes
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiLinuxmacOSWebWindows
- Free plan
- Yes
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Free planFree trial apiLinuxmacOSself-hostedWebWindows
- Free plan
- No
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms$0.07/mofirst paid tier About TypeDBVisit site - Free plan apiLinuxmacOSself-hostedWebWindowsRecognisedDocumentedFree planPlatforms
- Free plan apiLinuxself-hostedWebWindowsRecognisedDocumentedFree planPlatforms
- Free plan apiLinuxself-hostedWeb
- Free plan
- Yes
- Ontology modeling
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiLinuxself-hostedWeb
- Free plan
- Yes
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- No
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Free planFree trial self-hosted
- Free plan
- Yes
- Paid from
- 65 /mo
RecognisedDocumentedFree planPlatforms$65/mofirst paid tier About Neo4jVisit site - Free plan
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free trial apiLinuxmacOSself-hostedWebWindowsRecognisedDocumentedFree planPlatforms
- Free plan WebWindows
- Free plan
- Yes
- Ontology modeling
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Free trial apiLinuxself-hostedWebWindows
- Free plan
- No
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - WindowsmacOSLinux
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
- Paid from
- 20 /mo
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms -
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Windows
- Free plan
- Yes
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - WebLinux
- Free plan
- No
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
- Ontology modeling
- Yes
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Semantic reasoning
- Yes
- RDF/SPARQL support
- Yes
- Graph visualization
- Yes
RecognisedDocumentedFree planPlatforms
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which knowledge graph software is ranked first on Everything Xiaomi?
AllegroGraph is ranked #1 of 33 with a score of 7.3. GraphDB is second and Protégé third.
How many of these have a free plan?
14 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, TypeDB has the lowest first paid tier we found: $0.07/mo.
How is this list ranked?
Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on. Paid placements never change a rank.