The technologies listed below are all enterprise search software with impressive implementations in large organizations.
Apache LuceneTM is a high-performance, full-featured text search engine library written entirely in Java. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform. Includes rank searching, powerful query types, fielded searching, multiple index search, flexible faceting etc
Constellio is the first open source comprehensive suite of enterprise search software. It is the result of more than 2 years of research and development and is based on best practices and standards of market research information. Based on the popular search engine Apache Solr and using the architecture of connectors of Google Search Appliance, Constellio provides the solution to index all sources of information in your business. Constellio is compatible with all connectors from Google Search Appliance and can import any index from Solr and Lucene.
Elasticsearch is a flexible and powerful open source, distributed, real-time search and analytics engine. Architected from the ground up for use in distributed environments where reliability and scalability are must haves, Elasticsearch gives you the ability to move easily beyond simple full-text search. Through its robust set of APIs and query DSLs, plus clients for the most popular programming languages, Elasticsearch delivers on the near limitless promises of search technology.
Searchdaimon ES is based on ten years of research and development. ES is one of the most scalable, fastest and most accurate solutions for search today. Retrieval of information, analysis and storage constitutes the three most important parts of the system. With a highly advanced system for distributed information retrieval and analysis, combined with large capacity storage handling, we are ready to solve challenges for enterprises of all sizes.
SolrTM is the popular, blazing fast open source enterprise search platform from the Apache LuceneTMproject. Its major features include powerful full-text search, hit highlighting, faceted search, near real-time indexing, dynamic clustering, database integration, rich document (e.g., Word, PDF) handling, and geospatial search. Solr is highly reliable, scalable and fault tolerant, providing distributed indexing, replication and load-balanced querying, automated failover and recovery, centralized configuration and more. Solr powers the search and navigation features of many of the world’s largest internet sites.
Sphinx is an open source full text search server, designed from the ground up with performance, relevance (aka search quality), and integration simplicity in mind. It’s written in C++ and works on Linux (RedHat, Ubuntu, etc), Windows, MacOS, Solaris, FreeBSD, and a few other systems. Sphinx lets you either batch index and search data stored in an SQL database, NoSQL storage, or just files quickly and easily — or index and search data on the fly, working with Sphinx pretty much as with a database server.