opensolr

Opensolr Search replaces WordPress’s default search with a powerful, hosted Apache Solr search engine. It combines traditional keyword search with AI-powered vector search for dramatically better relevance.
Key Features:
<ul>
<li>Hybrid Search — combines keyword matching (BM25) with semantic vector search (1024-dim embeddings) for the best of both worlds</li>
<li>Faceted Navigation — filter results by category, price range, date, custom fields, and hierarchical taxonomies</li>
<li>AI Hints — streaming AI-generated answers above search results, powered by RAG</li>
<li>AI Reader — full-screen AI summary of any search result</li>
<li>Autocomplete — real-time search suggestions with query history and Solr results</li>
<li>WooCommerce Support — index products with prices, categories, SKUs, and structured data</li>
<li>Two Indexing Methods — Web Crawler (automatic) and Data Ingestion API (push from WordPress)</li>
<li>Search Analytics — track queries, clicks, CTR, no-results queries, and visitor patterns</li>
<li>Query Elevation — pin or exclude specific results for any query</li>
<li>Persistent Filters — admin-defined include/exclude filters applied to every search</li>
<li>Multilingual — automatic locale filtering for WPML and Polylang sites</li>
<li>Dark Theme — built-in dark mode for the search page</li>
<li>Embeddable — use native search or embed the Opensolr hosted search widget</li>
</ul>
How It Works:
<ol>
<li>Sign up at <a href="https://opensolr.com" rel="nofollow ugc">opensolr.com</a> and get your API key</li>
<li>Install the plugin and enter your credentials</li>
<li>Create a search index or connect to an existing one</li>
<li>Configure your sitemap and start the web crawler</li>
<li>Your search page is live at <code>/opensolr-search</code></li>
</ol>
The plugin generates a complete sitemap, injects meta tags for the crawler to extract, and provides a full search experience with zero load on your WordPress server — all search queries go directly to the Opensolr cloud.
Requirements:
<ul>
<li>An Opensolr account (free tier available)</li>
<li>PHP 8.1 or higher</li>
<li>WordPress 6.0 or higher</li>
</ul>
<h3>External services</h3>
This plugin depends on several online services operated by Opensolr (<a href="https://opensolr.com" rel="nofollow ugc">https://opensolr.com</a>) to provide hosted search. You must have an Opensolr account; all indexing and search queries flow through these services. The service is required for core plugin functionality and cannot be self-hosted.
Service provider
<ul>
<li>Opensolr — hosted Solr search cloud and AI API</li>
<li>Privacy policy: <a href="https://opensolr.com/learn/privacy-policy" rel="nofollow ugc">https://opensolr.com/learn/privacy-policy</a></li>
<li>Terms of service: <a href="https://opensolr.com/learn/terms-of-service" rel="nofollow ugc">https://opensolr.com/learn/terms-of-service</a></li>
<li>Account signup (free tier available): <a href="https://opensolr.com/register" rel="nofollow ugc">https://opensolr.com/register</a></li>
</ul>
Endpoints the plugin contacts
<ul>
<li><code>https://opensolr.com/solr_manager/api/*</code> — account management, index create/reload, config upload, sitemap registration, elevation toggle, crawl start/stop/stats. Called from WordPress admin (not from visitors’ browsers).</li>
<li><code>https://api.opensolr.com/solr_manager/api/ingest</code> — Data Ingestion API: pushes your post content + metadata to the search index. Called from the WordPress site (cron worker and the real-time sync on post save/delete), never from visitors.</li>
<li><code>https://api.opensolr.com/solr_manager/api/embed</code> — generates a 1024-dim semantic embedding for the current search query (AI/hybrid search path only). Called from the WordPress site on every AI/hybrid search.</li>
<li><code>https://api.opensolr.com/solr_manager/api/ai_summary</code> — streams the AI Hints / AI Reader answer. Called from the WordPress site only when the admin has enabled those features.</li>
<li><code>https://<your-solr-host>.solrcluster.com/solr/<your-index>/select</code> — the Solr search request itself (host provided by Opensolr when you create an index). Called from the WordPress site on every search.</li>
<li><code>https://search.opensolr.com/embed.js</code> — loaded ONLY if the admin switches Search Mode to “Embeddable”. In Native mode (the default), this script is never loaded.</li>
</ul>
Data sent to these services
<ul>
<li>Your Opensolr email + API key (authentication).</li>
<li>Your site’s host name (<code>meta_domain</code>).</li>
<li>For ingestion: post titles, content, URL, excerpt, author display name, taxonomy terms, publish dates, WooCommerce price + category + SKU, featured-image URL. Only for the post types you explicitly enable in the plugin settings. Never includes user login data, email addresses, or passwords.</li>
<li>For search: the search query string, the active facet filters, pagination position.</li>
<li>For AI features (when enabled): the search query plus the top 4 result snippets, so the AI can compose an answer from your own content.</li>
<li>For click tracking (when enabled): the clicked result URL, title, position, the search query, and a SHA-256 hash of the visitor’s IP (never the raw IP). Analytics can be disabled from the plugin’s Search Display settings.</li>
</ul>
No data is shared with any third party — all traffic goes only to <code>opensolr.com</code> / <code>api.opensolr.com</code> / <code>*.solrcluster.com</code> (and only to <code>search.opensolr.com</code> if you explicitly enable Embeddable mode).

Opensolr Search

Powerful hybrid vector + keyword search powered by Opensolr. AI-powered search, faceted navigation, autocomplete, analytics, and WooCommerce support.

modernquery

AI Search for WordPress!
ModernQuery is a drop-in site search replacement for WordPress and other content management systems. It also integrates with ChatGPT to provide conversational search / generative AI search.
Users are often unhappy with the search results for WordPress’s default site search. They’re used to a much better search experience, and providing a better site search tool will increase engagement and ensure your users find the right page on your site.
So if you’re looking for an AI search tool that provides better search results for WordPress, we think you’ll be pleasantly surprised. Give it a try!
<h3>AI Search for WordPress</h3>
ModernQuery adds AI search to WordPress by allowing users to ask questions to your site and get answers from your content. Instead of just searching keywords, they can ask the AI questions and it will generate answers sourced directly from your content (not from anywhere else on the web).
<h4>Features:</h4>
Get the site search features you’ve always wanted:
<ul>
<li>Search-as-you-type / search autocomplete</li>
<li>Relevant results returned immediately</li>
<li>Spellcheck / Forgives spelling mistakes</li>
<li>Plug and play: no complex configuration</li>
<li>ChatGPT conversational search / generative AI search</li>
<li>Manually adjust results ordering</li>
<li>Compatible with any content management system</li>
</ul>
Requires a subscription to ModernQuery.
<h3>ModernQuery API</h3>
This plugin uses the ModernQuery API to store and index your public website content.
Website: https://www.modernquery.io 
API URL: https://api.modernquery.io 
Terms of Service: https://www.modernquery.io/terms-of-service 
Privacy Policy: https://www.modernquery.io/privacy-policy

ModernQuery

AI Search for WordPress. Better WordPress search with no code required.

Opensolr Search vs ModernQuery