Halyard

At a glance

• Editor score
  7.7 / 10
• Pricing
  Open source
• Best for
  Horizontally scalable RDF on Hadoop or HBase
• Paid from
  Free
• Deployment options
  Hybrid
• Facts checked
  21 Sep 2026

• Where it wins

  • Apache HBase-backed storage supports horizontal RDF scaling
  • SPARQL 1.1, named graphs, federation, and REST APIs
  • Bulk loading and parallel export use Hadoop MapReduce tools

• Where it doesn't

  • Requires teams comfortable operating Hadoop and HBase infrastructure
  • Documentation appears substantially dated
  • Elasticsearch indexing and search are optional rather than core

Our verdict on Halyard

Halyard is an open-source RDF triplestore built for very large semantic data models and Linked Data snapshots. It stores RDF datasets in Apache HBase and is aimed at teams already operating Hadoop or HBase infrastructure, including deployments on Amazon EMR. Its web, Linux, macOS, API, and self-hosted access options support both service-based and command-line workflows.

Its ecosystem fit is a central strength. Halyard connects Apache HBase storage with Apache Hadoop processing, Eclipse RDF4J services, Amazon EMR deployments, and optional Elasticsearch literal indexing and search. RDF4J Server provides a SPARQL endpoint and REST APIs, while RDF4J Workbench supplies a web interface. The platform supports SPARQL 1.1 querying and updates, named graphs, federated queries across Halyard datasets through SPARQL SERVICE, and a broad set of RDF formats including Turtle, RDF/XML, N-Triples, TriG, N-Quads, JSON-LD, and others.

Halyard is more focused than a general-purpose RDF database: its architecture and operational model center on distributed Hadoop and HBase environments. Bulk loading and parallel export through Hadoop MapReduce tools make it suitable for large ingestion and movement workflows, while optional Elasticsearch support adds a separate path for literal search. Teams seeking a tightly integrated Hadoop/HBase RDF stack should consider Halyard; teams wanting a simpler deployment model or a narrower standalone triplestore are likely to prefer an alternative. The substantially dated documentation also makes current implementation planning an important consideration.

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Halyard pricing

Halyard fact sheet

Halyard integrations

Halyard lists 5 integrations on its own site.

• Apache HBase
• Apache Hadoop
• Eclipse RDF4J
• Amazon EMR
• Elasticsearch

Alternatives to Halyard

• GraphDBA broad RDF platform with a free edition and enterprise-grade deployment options.9.3
• AllegroGraphA broad RDF platform for reasoning, federation, analytics, and vector-enabled knowledge graphs.9.1
• StardogA broad enterprise platform for federated queries, virtual graphs, and semantic reasoning.9.0

See all Halyard alternatives →

Featured on iTechGuides

Halyard is listed in our RDF Databases directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update