This is a list of enterprise search vendors, restricted to those that have a dedicated entry. Vendors of proprietary enterprise search software Defunct vendors of proprietary enterprise search software * AskMeNow * Google Search Appliance * Omniture (acquired by Adobe Systems) * Q-go Free and open source enterprise search software * Apache Solr Last update December 2021 * March 2022 * Sphinx January 2020 * Terrier January 2020 * Xapian June 2020 Defunct free and open source software * ApexKB November 2010 * Gigablast Last update unknown * ht-//Dig June 2004 * Lemur June 2010 * mnoGoSearch December 2015 * OpenSearchServer Last update unknown * Searchdaimon Last update unknown * Zettair October 2009