Welcome to Querqy.org!

Querqy.org is an umbrella for open source tools and libraries that helps you create a powerful e-commerce search platform quickly. The focus is on optimising search relevance from day one, beyond the out-of-the-box capabilities of the Solr and Elasticsearch search engines.

Documentation (incl. a ‘Getting started’)


Source code


Make sure you check Chorus, a _reference implementation_ for ecommerce search, now in Solr <https://docs.querqy.org/chorus/index.html> and Elasticsearch <https://docs.querqy.org/chorus/index.html> editions.

Get in touch!

Drop us an e-mail at hellopete@querqy.org or ping us on Gitter QuerqyGitter!


Querqy.org - Tools and libraries


A query rewriting library for Elasticsearch and Solr. It helps you tune your search results for specific search terms and reduces the overall complexity of query building. It also comes with many dials and knobs for search relevance optimisation. You can plugin in your own query rewriter.

Get started with Querqy!

Source code: Elasticsearch | Solr

Latest versions: QuerqyESDownload | QuerqySolrDownload Release notes


Search Management UI. A web UI to manage rules for query rewriting with Querqy (query-dependent synonyms, filters, boost/demote documents, …) Supports rule management per language, multiple rule deployment targets, per-tenant rules. Currently available for Solr.

Get started with SMUI!

Source code: SMUI

Release notes: v3.6


A Docker compose based reference implementation for Solr and Elasticsearch to ramp up your search project quickly.

Get started with Chorus!

Source code: Chorus Solr Edition

Source code: Chorus Elasticsearch Edition

Who we are

Querqy.org is an initiative by

  • Eric Pugh

  • Johannes Peter

  • Paul M. Bartusch

  • René Kriegler

Feel free to get in touch!