1. Elasticsearch is an open source, distributed, RESTful search engine.

  2. 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.

  3. Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...

  4. The simplest way to add search to your website or application. Sign up for free.

  5. Swiftype Site Search helps to sell more, get the right answer to more people on the platform and surface relevant content for readers and followers.

  6. 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.

  7. The simple way to create a great search experience for your users and your team.

  8. Amazon Elasticsearch Service is a managed service that makes it easy to deploy, operate, and scale Elasticsearch in the AWS Cloud.

  9. Xapian is an open source probabilistic information retrieval library, released under the GNU...

  10. SearchSpring is an eCommerce site search tool.

  11. OpenSearchServer is an open source application server allowing development of index-based...

  12. Instant Search for your Website | AddSearch - Add Instant Search to Your Website