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LinkedDataHub
Lithuania
What it is
LinkedDataHub is a free, open-source low-code platform for working with RDF knowledge graphs. It supports data management, visualizations, and app building, and can also be used as an RDF-focused content management system. Its tools include a UI component library, SPARQL-based templates for creating and editing content, and SPIN and SHACL constraints for validating incoming data. CSV imports can be mapped to RDF using SPARQL CONSTRUCT, and RDF imports can be transformed with that query approach. Authentication supports WebID and OpenID Connect with Google and ORCID; WAC permissions govern reading, writing, appending, and control. Documents have Git-backed version histories accessible through Memento. LinkedDataHub provides a SPARQL endpoint and a read-write Linked Data API, and can serve a document as HTML or RDF from the same URI. Apache Jena Fuseki is the default, with support for compatible SPARQL 1.1 triplestores. The documented setup uses Docker Compose and backend triplestores. The project is self-hosted under an Apache 2.0 license.
For and against
For
- Free and licensed under Apache 2.0.
- Supports CSV and RDF imports.
- Provides a SPARQL endpoint and read-write API.
- Serves documents as HTML or RDF from one URI.
Against
- The setup is self-hosted.
- Currently supported imports are CSV and RDF.
- The documented local setup uses Docker Compose.
The verdict
LinkedDataHub brings RDF data management, app building, validation, and APIs together in a self-hosted platform. Its fit depends on working with RDF and the supported import and triplestore options.
Who it suits
LinkedDataHub may fit researchers, data scientists, developers, data publishers, and builders of AI agents who work with RDF data. It is suited to users comfortable with a self-hosted setup and SPARQL-based tools.
Plans and prices
Open-source
RDF knowledge-graph management · visualizations · app building · free AWS Marketplace product
Read 15 Oct 2026 · github.com
On the record
- Access control
- Access control uses WAC authorizations with read, write, append, and control modes.atomgraph.github.io · read 4 Oct 2026
- API
- LinkedDataHub implements a REST-style API based on the SPARQL 1.1 Graph Store Protocol.docs.linkeddatahub.com · read 15 Oct 2026
- API operations
- The API supports GET, POST, PUT, DELETE and PATCH document operations, with PATCH restricted to specific graph-scoped SPARQL update forms.docs.linkeddatahub.com · read 15 Oct 2026
- Authentication
- The UI supports WebID-TLS client certificates and OpenID Connect through Google or ORCID.docs.linkeddatahub.com · read 15 Oct 2026
- Authorization
- Document operations are access-controlled and unauthorized requests return HTTP 403.docs.linkeddatahub.com · read 15 Oct 2026
- Backing stores
- LinkedDataHub serves RDF from a backing triplestore, with Apache Jena Fuseki as the default and standards-compliant SPARQL stores supported.atomgraph.com · read 15 Oct 2026
- CLI
- The ldh command-line program drives the same HTTP API as the UI and covers most UI actions.docs.linkeddatahub.com · read 15 Oct 2026
- CLI runtime
- Released CLI archives require Java 21; building from source additionally requires Maven.github.com · read 15 Oct 2026
- Company founding
- AtomGraph’s about page says it was founded in 2011 by Martynas Jusevičius and Džiugas Tornau.atomgraph.com · read 15 Oct 2026
- Company headquarters
- LinkedIn lists AtomGraph headquarters in Copenhagen, Denmark, with another location in Kaunas, Lithuania.linkedin.com · read 15 Oct 2026
- Company size
- LinkedIn lists AtomGraph as privately held with 2–10 employees.linkedin.com · read 15 Oct 2026
- Data architecture
- Applications and documents are represented as data and managed through a generic HTTP API, with declarative presentation rather than mandatory JavaScript or Java.github.com · read 15 Oct 2026
- Data browser
- A built-in Linked Data browser can fetch and display external resources through a proxy.docs.linkeddatahub.com · read 15 Oct 2026
- Data imports
- It supports CSV imports mapped to RDF with SPARQL CONSTRUCT and RDF imports transformed with SPARQL CONSTRUCT.atomgraph.github.io · read 4 Oct 2026
- Deployment
- The setup guide runs LinkedDataHub locally with Docker Compose and stores RDF data in backend triplestores.atomgraph.github.io · read 4 Oct 2026
- Documentation depth
- Documentation covers administration, CLI, configuration, data models, dataspaces, HTTP API, imports, triplestores, stylesheets and user tutorials.atomgraph.github.io · read 15 Oct 2026
- Extensibility
- Custom Docker images, Java 21 Maven overlays, Jersey 3 REST resources, Apache Jena 6 components and Saxon XSLT extensions are documented.docs.linkeddatahub.com · read 15 Oct 2026
- Features
- It provides a UI component library, SPARQL-based creation and editing templates, and SPIN and SHACL constraints for validating incoming data.atomgraph.github.io · read 4 Oct 2026
