LinkedDataHub

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What LinkedDataHub is

LinkedDataHub is a free, open-source low-code platform for managing data, creating visualizations, and building applications around RDF knowledge graphs. It can also be used as an RDF-native content management platform. Its tools include a UI component library, SPARQL-based templates for creating and editing content, and SPIN and SHACL constraints to validate incoming data. Imports support CSV mapped to RDF with SPARQL CONSTRUCT and RDF transformed with SPARQL CONSTRUCT.

Authentication supports WebID and OpenID Connect through Google and ORCID. WAC authorizations define read, write, append, and control access. Git-backed document versioning provides history through the Memento protocol. The platform includes a SPARQL endpoint and a read-write Linked Data API; the same document URI can serve HTML or RDF. Apache Jena Fuseki is the default triplestore, and LinkedDataHub can also work with SPARQL 1.1-compatible triplestores that support Query, Update, and Graph Store Protocol. The documented local setup uses Docker Compose and stores RDF data in backend triplestores. Support channels include a mailing list, issue reporting, and a support contact. Its stated use cases include researchers and data scientists, developers and data publishers, and AI agents and their builders.

Who it suits

LinkedDataHub suits researchers, data scientists, developers, and data publishers working with RDF knowledge graphs. It also presents use cases for people building AI agents and can serve teams that need an RDF-native content platform with self-hosted deployment.

What it does well

Free under the Apache 2.0 license.
Imports CSV and RDF data.
Supports SPARQL 1.1 and provides a SPARQL endpoint.
Documents can be served as HTML or RDF from the same URI.
Git-backed document history is available through Memento.

What to know first

Deployment is self-hosted and the documented setup uses Docker Compose.
The currently supported data imports are CSV and RDF.
The default setup uses backend triplestores to store RDF data.

Limits

The open-source plan is free and requires a self-hosted setup. The get-started guide identifies CSV and RDF as the supported data import formats.

Plans

Plan	Billed and limits	Price
Open-source	RDF knowledge-graph management · visualizations · app building · free AWS Marketplace product	Free

As atomgraph.github.io lists them, read 15 Oct 2026. The maker's own page has the final word.

Getting started

Visit the LinkedDataHub project website and documentation.
Set up the platform locally with Docker Compose.
Configure a backend triplestore for RDF data; Apache Jena Fuseki is used by default.
Import CSV or RDF data.
Connect authentication with WebID or OpenID Connect through Google or ORCID, as appropriate.

Verdict

Pick LinkedDataHub if you need a free, self-hosted platform for working with RDF data, SPARQL, and knowledge-graph applications. Its imports, APIs, access controls, and document history are designed around linked data. Teams seeking a hosted service or import formats beyond CSV and RDF should look elsewhere.

Questions

Is LinkedDataHub free?

Yes. Its Open-source plan costs nothing and uses the Apache 2.0 license.

Is LinkedDataHub open source?

Yes. It is open source under the Apache 2.0 license.

Which platforms does it support?

It lists API, Linux, self-hosted, and web. The documented setup runs the platform locally with Docker Compose.

Which data formats can it import?

The supported imports listed in the get-started guide are CSV and RDF.

Which query language does it support?

It supports SPARQL 1.1 and provides a SPARQL endpoint.

What triplestore does it use?

Apache Jena Fuseki is the default. It can also work with SPARQL 1.1-compatible triplestores supporting SPARQL Query, SPARQL Update, and Graph Store Protocol.

Facts from LinkedDataHub's own pages

Access control: Access control uses WAC authorizations with read, write, append, and control modes. · atomgraph.github.io, 4 Oct 2026
API: LinkedDataHub implements a REST-style API based on the SPARQL 1.1 Graph Store Protocol. · docs.linkeddatahub.com, 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, 15 Oct 2026
Authentication: The UI supports WebID-TLS client certificates and OpenID Connect through Google or ORCID. · docs.linkeddatahub.com, 15 Oct 2026
Authorization: Document operations are access-controlled and unauthorized requests return HTTP 403. · docs.linkeddatahub.com, 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, 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, 15 Oct 2026
CLI runtime: Released CLI archives require Java 21; building from source additionally requires Maven. · github.com, 15 Oct 2026
Company founding: AtomGraph’s about page says it was founded in 2011 by Martynas Jusevičius and Džiugas Tornau. · atomgraph.com, 15 Oct 2026
Company headquarters: LinkedIn lists AtomGraph headquarters in Copenhagen, Denmark, with another location in Kaunas, Lithuania. · linkedin.com, 15 Oct 2026
Company size: LinkedIn lists AtomGraph as privately held with 2–10 employees. · linkedin.com, 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, 15 Oct 2026
Data browser: A built-in Linked Data browser can fetch and display external resources through a proxy. · docs.linkeddatahub.com, 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, 4 Oct 2026
Deployment: The setup guide runs LinkedDataHub locally with Docker Compose and stores RDF data in backend triplestores. · atomgraph.github.io, 4 Oct 2026
Documentation depth: Documentation covers administration, CLI, configuration, data models, dataspaces, HTTP API, imports, triplestores, stylesheets and user tutorials. · atomgraph.github.io, 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, 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, 4 Oct 2026
Founded: 2011 · atomgraph.github.io, 28 Sept 2026
Funding news: AtomGraph says LinkedDataHub version 5 was released July 2, 2025 after an 18-month cycle with NLNet funding assistance. · atomgraph.com, 15 Oct 2026
Headquarters: Lithuania · atomgraph.github.io, 28 Sept 2026
Imports: Documented import formats include CSV and RDF, with CSV-to-RDF mapping workflows. · atomgraph.github.io, 15 Oct 2026
Independent ecosystem listing: The European Commission Interoperable Europe portal lists LinkedDataHub as Apache-licensed software with GUI, CLI and API interfaces for RDF management, SPARQL output and visualization. · interoperable-europe.ec.europa.eu, 15 Oct 2026
Integrations: LinkedDataHub uses Apache Jena Fuseki by default and can work with SPARQL 1.1-compatible triplestores that support SPARQL Query, SPARQL Update, and Graph Store Protocol. · atomgraph.github.io, 4 Oct 2026

Where LinkedDataHub stands on Freedom251

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