OpenSearchServer is a powerful, enterprise-class, search engine program. Using the web user interface, the crawlers (web, file, database, etc.) and the client libraries (REST/API , Ruby, Rails, Node.js, PHP, Perl) you will be able to integrate quickly and easily advanced full-text search capabilities in your application: Full-text with basic semantic, join queries, boolean queries, facet and filter, document (PDF, Office, etc.) indexation, web scrapping,etc. OpenSearchServer runs on Windows and Linux/Unix/BSD.


  • A crawler allows you to index the following: web pages; rich format documents from files on local and remote systems; and contents from any JDBC database, such as Oracle, MySQL, PostgreSQL, Microsoft SQL Server,
  • Full text analyzers and filters allowing indexing and searches in 16 languages: Chinese, Danish, Dutch, English, Finnish, French, German, Hungarian, Italian, Norwegian, Portuguese, Romanian, Russian, Spanish, Swedish, Turkish.
  • Multi-lingual analysers slice sentences into words, then run lemmatisation algorithms on words based on the document’s language (singular/plural, gender, conjugated verbs, etc.)
  • HTML renderer allowing the integration of the search box in an HTML/XHTML page, working with PHP and .NET, client library and XML over HTTP API,
  • Parsers allowing you to get content and metadata from most documents and formats, such as XML, HTML/XHTML, Adobe™ PDF, Microsoft™ Word™, PowerPoint™, OpenOffice™, RTF, Plain text, Torrent, Audio files (MP3/MP4, OGG, FLAC, WMA) etc.
  • A series of caches to accelerate processes and deliver faster applications,
  • Monitoring and administration: Alerting services, integrated scheduler, index replication, user management,
  • Free online developers' documentation,
  • Advanced functionality: faceted search, clustering, filters, snippets, synonyms, stopwords, highlighting, categorization, “find similar”, automatic thumbnail screenshot inclusion, boost/reduce relevance,
  • Drupal module and WordPress module available.
  • REST API, PHP, .NET and Ruby client
  • RIA web interface built around the Zkoss (ZK) framework.

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User Reviews

  • Excellent Lucent implementation. It's very powerfull and API REST easy to use.

  • Powerful but very unstable and greedy in memory...

  • First Search Server I can say i got up and running, in minutes, not hours

    1 user found this review helpful.
  • Very Good program One thing I can not seem to find coding to Show the thumbnail screenshot on the search results page that i have cataloged. Very little info on the net about this.

    1 user found this review helpful.
  • Fully integrated powerfull solution : the best one for me now. Thanks for your amazing job !

    1 user found this review helpful.
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Additional Project Details



Intended Audience

Information Technology, Telecommunications Industry, Advanced End Users, System Administrators, Developers, Engineering

User Interface


Programming Language

C++, PHP, Visual Basic .NET, Java

Database Environment




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