Search is a much needed discovery tool on any website. Doesnt mean that it has to be costly. With search technology maturing, Expertrec offers a high quality search experience at an affordable cost.
Algolia - 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.
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.
elasticsearch-head - A web front end for an elastic search cluster
Apache Solr - Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...
Manticore search - https://www.