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Dydra

A cloud-hosted RDF triplestore written in Common Lisp with a revisioned graph store that maintains versioned snapshots of previous states, queryable via a REVISION clause in SPARQL. Uses LMDB for storage and RonDB for scaled deployments. Supports MQTT streaming for incremental changes.

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Overall rank
#86
First released
2011
License
Proprietary
Built with
Common Lisp

Details

Vendor
Datagraph GmbH
Type
RDF
Category
Emerging
Status
Inactive — Public SDK last updated 2012. Core engine is closed-source with limited visibility.
License
Proprietary
Language
Common Lisp
Query Languages
SPARQLGraphQL
Protocols
HTTP/RESTSPARQL Protocol
Sources 8 references

Protocols SPARQL Protocol, HTTP/REST

Every repository has a standard SPARQL 1.1 endpoint; Dydra also documents a genuinely separate JSON REST API (api.dydra.com) for account/repository creation, deletion, configuration and collaboration, which pass_A missed.

License Proprietary

Confirms current value; Dydra is a closed-source hosted service with no public source release.

  • Our proprietary distributed SPARQL query engine, called SPOCQ, is built in Lisp and compiles SPARQL queries to native x86 machine code.
    Dydra | Frequently Asked Questions (FAQ) · reviewed 2026-08-02

Released 2011

Confirms current value's year via an archived landing page and contemporary press coverage from 2011, but the exact public-availability date is unclear: the site was still gated behind a private-beta email signup as late as the December 2013 Wayback snapshot.

  • Dydra—the product of two years of research—is an RDF cloud service. You provide the data, we provide everything else.
    Dydra · reviewed 2026-08-02
  • Recorded on October 9, 2011. TechCrunch Interviews Ben Lavender from Dydra, a special cloud based data mining graph service.
    Dydra Cloud Based Graph Database | TechCrunch · reviewed 2026-08-02

Language Common Lisp

The SPARQL query engine SPOCQ (the project's stated core) is built in Lisp; a 2026 Datagraph conference paper confirms Common Lisp tooling specifically. Storage is in C/C++, noted for the split.