Relevanssi replaces the default search with a partial-match search that sorts results by relevance. It also indexes comments and shortcode content.
A powerful ajax search engine for WordPress. Add a live search form to your site with filters. Custom post types, custom fields, categories supported
This plugin adds to default WordPress search engine the ability to search by content from selected fields of Advanced Custom Fields plugin.
Better Search replaces the default WordPress search with a better search engine that gives contextual results sorted by relevance
Our FREE plugin makes your website’s search fast and more relevant. searchIQ helps you to manage content more effectively with real-time analytics.
Extends the default fulltext search with relevance, jet speed and ability to search any posts, metadata, taxonomy, shortcode content and more data.
Fast, intelligent, and fully customizable search for your site.
Precise and fast search, autocompletion, and search suggestions for your WordPress page.
Improve the search functionality on your site by using Bing Custom Search for WordPress.
A (unofficial) WordPress plugin to use Algolia as a search engine.