Apisearch
Algolia
Apache Solr
ElasticSearch
Google Custom Search Engine
Site Search 360
Sphinx (search engine)
Swiftype
Findability
Algolia
SearchTap.io
ElasticSearch
OpenSearchServer
Xapian
Expertrec
elasticsearch-head
Apisearch FindabilityAlgolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.
Apache Solr - Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...
SearchTap.io - SearchTap is a search technology that can easily integrate with websites and mobile apps to provide an Amazon-like search experience without writing any code. It solves search problems for websites, businesses, mobile apps and enterprise software.
ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.
Google Custom Search Engine - Google Custom Search is a platform provided by Google that allows web developers to feature specialized information in web searches, refine and categorize queries and create customized search engines, based on Google Search.
OpenSearchServer - OpenSearchServer is an open source application server allowing development of index-based...