Searchify is an embedded website search and search marketing application that allows you complete control over search results. The Searchify dashboard lets you create the most relevant search results and custom results so that you can promote specific product results to your website users.
You can rank results based on relevance and sales performance along with suggested results based on keyword search and also smart searches - result suggestions based on the first letters of user searches.
ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.
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.
Azure Cognitive Search - Azure Search makes it easy to add powerful and sophisticated search capabilities to your website or...
Cludo - The simple way to create a great search experience for your users and your team.
Amazon CloudSearch - Amazon CloudSearch is a fully-managed service in the cloud that makes it easy to set up, manage, and scale a search solution for your website.
SeekStorm - SeekStorm - Search as a Service: Affordable, high performance search & crawling.