17.9
Open sourceWebAPILinux
Best Knowledge Graph Software in 2026
For data organized around relationships, knowledge graph software can help with modeling, exploring, and querying those connections. AllegroGraph, GraphDB, and Protégé are among the options to compare on graph visualization, ontology modeling, and import formats. Deployment choices and query languages can also shape how a tool fits into your workflow; check RDF/SPARQL support and semantic reasoning for further…
27.8
Mendix is a low-code platform for building, running, and orchestrating apps and agents for a hybrid workforce.
Free planAndroidiOSWeb
37.8
RDFox is a main-memory data store for centralized RDF graphs, queried with SPARQL 1.1.
Free planWebAPILinux
- 4
Stardog
Stardog connects enterprise data through a semantic layer for AI, analytics, search, and applications.
Free planAndroidiOSWebAPI7.7Free plan - 5
Eclipse RDF4J
Eclipse RDF4J is an open-source Java framework for parsing, storing, querying, and reasoning over RDF data.
Free planOpen sourceWebAPILinuxmacOS7.6Free plan - 6
Apache Jena Fuseki
Apache Jena Fuseki is a SPARQL server for standalone use or embedding in an application.
Free planOpen sourceWebAPILinuxSelf-hosted7.5Free plan - 7
LinkedDataHub
LinkedDataHub is an open-source, low-code platform for managing data, making visualizations and building apps with RDF knowledge graphs.
Free planOpen sourceWebAPILinuxmacOS7.5Free plan - 8
Protégé
Protégé is a free ontology editor for building and managing ontologies, available as the desktop application Protégé Desktop and the browser-based WebProtégé.
Free planOpen sourceWebAPILinuxmacOS7.4Free plan - 9
AllegroGraph
AllegroGraph is a semantic graph database for building knowledge graphs and bringing complex data together.
Free planWebAPILinuxmacOS7.3Free plan - 10
Neo4j
Neo4j is a property graph database for storing and querying connected data.
Free planSelf-hosted7.0From $65 a month - 11
TypeDB
TypeDB is a structured hypergraph database with an enforced schema and first-class n-ary relations.
Free planWebAPILinuxmacOS7.0From $0.07 a month - 12
HASH
HASH is an open-source platform that builds an evolving model of organizational information by combining a knowledge graph and a process graph.
Free planWebAPIExtensionSelf-hosted6.7From $20 a month - 13
GraphDB
GraphDB is a semantic graph database for connecting fragmented business data with RDF and SPARQL, then deriving real-time insights through inferencing and semantic search.
Free planWebAPILinuxmacOS6.5Free plan - 14
QLever
QLever is an open-source graph database for loading and querying large RDF datasets.
Free planWebAPILinuxmacOS6.5Free plan - 15
Oxigraph
Oxigraph is a graph database and toolkit for RDF data and SPARQL.
Free planWebAPILinuxSelf-hosted6.4Free plan - 16
PoolParty Semantic Suite
PoolParty Semantic Suite connects customer databases and applications through semantic technologies, allowing knowledge models to develop in an interconnected environment.
WebAPILinuxSelf-hosted6.4From $30,400 a year - 17
RDF Studio
RDF Studio is a semantic data workspace for exploring, querying, visualizing, and modeling RDF knowledge graphs.
Free planWebAPILinuxmacOS6.4Free plan - 186.2
- 19
TerminusDB
TerminusDB is an open-source document graph database for storing JSON documents in a schema-enforced graph.
Free planWebAPILinuxSelf-hosted6.2Free plan - 20
Progress Semaphore
Progress Semaphore provides a semantic layer for generative AI, intended to make outcomes more relevant, explainable, and trustworthy.
WebAPILinuxSelf-hosted6.1 - 21
metaphactory
WebAPILinuxSelf-hosted6.0 - 22
Mondeca
Mondeca is a semantic product suite for taxonomy management, AI content annotation, and knowledge graph management.
WebAPI5.8 - 23
Timbr
WebAPILinuxSelf-hosted5.8 - 24
Synaptica
Synaptica provides paid enterprise software and services for taxonomy management, ontology schema management, knowledge graphs and semantic classification.
WebAPI5.6 - 25
eccenca Corporate Memory
eccenca Corporate Memory is an enterprise knowledge graph platform for managing data, rules, constraints, capabilities, and configurations.
WebAPILinuxSelf-hosted5.5