What are the best Search Engine as a Service providers?
Amazon CloudSearch is a managed service in the AWS Cloud that makes it simple and cost-effective to set up, manage, and scale a search solution for your website or application. The service is part of the Amazon Web Services (AWS) offering and supports over 34 languages and popular search features such as highlighting, autocomplete, and geospatial search.
Azure Cognitive Search is cloud-based search service formerly known as Microsoft Azure Search. Azure Cognitive Search uses Microsoft Bing's natural language stack, used by the search engine for more than a decade, to power AI services across vision, language, and speech. With Azure Cognitive Search, you can spend more time building your product than maintaining complex search infrastructure.
Elasticsearch is an open-source, highly scalable search and analytics engine written in Java. The engine is built ontop of Apache Lucene Library and has an advanced distributed model and consistent API interface. Elasticsearch allows you to store, search, and analyze huge volumes of data quickly and in near real-time with answers provided in milliseconds. Making it perfect for building full text search, analytics store, auto completer, spell checker, and alerting engines.
Algolia is a hosted search engine capable of delivering real-time results from the first keystroke. Algolia provides developers with a powerful API that can be used to quickly and seamlessly implement search within your websites, mobile, and voice applications. Their goal is to provide development teams with the building blocks to create a fast, relevant search experience.