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Groonga

Open-source full-text search engine and column store

Search Engines ★ 859 stars Medium setup LGPL-2.1

Groonga is an open-source full-text search engine and column-oriented database optimized for fast, real-time indexing. It powers self-hosted search for Japanese and multilingual content via integrations like Mroonga.

Official siteSource code

Key features

  • Real-time indexing
  • Column store engine
  • Strong CJK support
  • HTTP query interface

Pros & cons

Strengths

  • Fast incremental updates
  • Excellent CJK handling

Trade-offs

  • Smaller ecosystem
  • Documentation skews Japanese

Is Groonga secure?

OSV.dev has no published security advisories for Groonga's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

Source: OSV.dev, checked 2026-10-14. How this is measured.

Groonga replaces

Self-hosted Elasticsearch alternatives

Health badge

Maintain Groonga? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 82 · excellent

Markdown
[![SelfHostIndex health score for Groonga](https://selfhostindex.com/badge/groonga-search.svg)](https://selfhostindex.com/app/groonga-search/)
HTML
<a href="https://selfhostindex.com/app/groonga-search/"><img src="https://selfhostindex.com/badge/groonga-search.svg" alt="SelfHostIndex health score for Groonga"></a>
reStructuredText
.. image:: https://selfhostindex.com/badge/groonga-search.svg
   :alt: SelfHostIndex health score for Groonga
   :target: https://selfhostindex.com/app/groonga-search/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

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