Nima Shayanfar

Bushwack Studio

ElasticProbe, a fast and flexible search and query engine for WordPress, enables WordPress to find or “query” relevant content extremely fast through a variety of highly customizable features. WordPress out-of-the-box struggles to analyze content relevancy and can be very slow. ElasticProbe supercharges your WordPress website making for more sales, happier users and administrators. The plugin even contains many features.
Here is a list of the amazing ElasticProbe features included in the plugin:
Search: Instantly find the content you’re looking for. Even when you misspell.
Instant Results: A built for WordPress search experience that bypasses WordPress for optimal performance. Instant Results routes search queries through a dedicated API, separate from WordPress which results in lightning fast search experience.
WooCommerce: With ElasticProbe, filtering WooCommerce product results is fast and easy. Your customers can find and buy exactly what they’re looking for, even if you have a large or complex product catalog.
Related Posts: ElasticProbe understands data in real time, so it can instantly deliver engaging and precise related content with no impact on site performance.
Protected Content: Optionally index all of your content, including private and unpublished content, to speed up searches and queries in places like the administrative dashboard.
Documents: Indexes text inside of popular file types, and adds those files types to search results.
Autosuggest: Make (post, page or custom type) suggestion while user is typing in the search input.
Autocomplete: Complete the search query term while the user is typing.
Filters: Add controls to your website to filter content by one or more taxonomies.
Comments: Indexes your comments and provides a widget with type-ahead search functionality. It works with WooCommerce product reviews out-of-the-box.

ElasticProbe

A lightning fast and flexible search and query engine for WordPress.

foadyousefi

Redisearch implements a search engine on top of Redis. It has lots of advanced features, like exact phrase matching and numeric filtering for text queries, that are nearly not possible or inefficient with mysql search queries.
<h3>IMPORTANT</h3>
The latest version of this plugin supports RediSearch version 2.0 (or higher) which runs on Redis 6.0 (or higher). If you have version prior to 2.0, please use this plugins 0.2.7.
Here you find a list of RediSearch features included in the plugin:
Search: Instantly find the content you’re looking for. The first time.
Scoring fields differently: Give different score to different fields. For example higher score to product name and number than its description.
Fuzzy Search: Don’t worry about visitors misspelling.
Autosuggest: Adds a suggestion string to an auto-complete suggestion dictionary.
Synonyms: RediSearch supports synonyms, that is searching for synonyms words defined by the synonym data structure.
<h3>Existing features</h3>
<ul>
<li>WooCommerce: Index and search through most of existing products meta data.</li>
<li>Document: Index content of binary files such as pdf, word, excel and powerpoint.</li>
<li>Synonym: Adding synonym groups is simple. Just add each comma separated group on a new line in synonym settings and done.</li>
<li>Live search (aka autosuggest): Search as you type regardless of misspelling.</li>
</ul>

RediSearch

Flexible search engine for WordPress with very high performance.

ElasticProbe vs RediSearch