4
Stardog
Stardog connects enterprise data through a semantic layer for AI, analytics, search, and applications.
Free planAndroidiOSWebAPI
7.7Free plan
Visit
5
Eclipse RDF4J
Eclipse RDF4J is an open-source Java framework for parsing, storing, querying, and reasoning over RDF data.
Free planOpen sourceWebAPILinuxmacOS
7.6Free plan
Visit
6
Apache Jena Fuseki
Apache Jena Fuseki is a SPARQL server for standalone use or embedding in an application.
Free planOpen sourceWebAPILinuxSelf-hosted
7.5Free plan
Visit
7
LinkedDataHub
LinkedDataHub is an open-source, low-code platform for managing data, making visualizations and building apps with RDF knowledge graphs.
Free planOpen sourceWebAPILinuxmacOS
7.5Free plan
Visit
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 sourceWebAPILinuxmacOS
7.4Free plan
Visit
9
AllegroGraph
AllegroGraph is a semantic graph database for building knowledge graphs and bringing complex data together.
Free planWebAPILinuxmacOS
7.3Free plan
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10
Neo4j
Neo4j is a property graph database for storing and querying connected data.
Free planSelf-hosted
7.0From $65 a month
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11
TypeDB
TypeDB is a structured hypergraph database with an enforced schema and first-class n-ary relations.
Free planWebAPILinuxmacOS
7.0From $0.07 a month
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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-hosted
6.7From $20 a month
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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 planWebAPILinuxmacOS
6.5Free plan
Visit
14
QLever
QLever is an open-source graph database for loading and querying large RDF datasets.
Free planWebAPILinuxmacOS
6.5Free plan
Visit
15
Oxigraph
Oxigraph is a graph database and toolkit for RDF data and SPARQL.
Free planWebAPILinuxSelf-hosted
6.4Free plan
Visit
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-hosted
6.4From $30,400 a year
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17
RDF Studio
RDF Studio is a semantic data workspace for exploring, querying, visualizing, and modeling RDF knowledge graphs.
Free planWebAPILinuxmacOS
6.4Free plan
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18
Ontop
Ontop is a free, Apache 2.0-licensed Virtual Knowledge Graph system.
WebAPILinuxmacOS
6.2
Visit
19
TerminusDB
TerminusDB is an open-source document graph database for storing JSON documents in a schema-enforced graph.
Free planWebAPILinuxSelf-hosted
6.2Free plan
Visit
20
Progress Semaphore
Progress Semaphore provides a semantic layer for generative AI, intended to make outcomes more relevant, explainable, and trustworthy.
WebAPILinuxSelf-hosted
6.1
Visit
21
metaphactory
WebAPILinuxSelf-hosted
6.0
Visit
22
Mondeca
Mondeca is a semantic product suite for taxonomy management, AI content annotation, and knowledge graph management.
WebAPI
5.8
Visit
23
Timbr
WebAPILinuxSelf-hosted
5.8
Visit
24
Synaptica
Synaptica provides paid enterprise software and services for taxonomy management, ontology schema management, knowledge graphs and semantic classification.
WebAPI
5.6
Visit
25
OWLGrEd
OWLGrEd is a free ontology-modeling application available on the web and Windows.
Free planWebWindows
5.5Free plan
Visit
26
d.AP
d.AP is an AI context platform for enterprises connecting business knowledge across systems for agents, applications, and BI tools.
API
5.4
Visit
27
Ontotext Platform
WebAPILinuxSelf-hosted
5.4
Visit
28
InfoLibrarian Knowledge Graph Engine
APISelf-hosted
5.2
Visit
29
Qlevia Enterprise RDF Graph Platform
Web
4.6
Visit
30
ROBOKOP
Web
4.6
Visit

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