LuckyWP

The “LuckyWP Wiki Linking” plugin allows to easily organize a linking in the wiki style on the website: you specify the keyword phrases for a post, and the plugin places links to this post on other website pages that have the keyword phrases are present in the text.
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You DON’T NEED to manually place each individual link, the plugin will make it for you.
When placing a link in a post, whole words are only taken into account. For example, the link with the keyword phrase bus will be added to the text:
<blockquote>
She got on the bus at Clark Street.
</blockquote>
… and the link will NOT be added to the text:
<blockquote>
I’m here on business.
</blockquote>
In addition to links to the posts of the website, you can also place custom external links by specifying them when adding a keyword phrase.
<h4>The typical use cases:</h4>
<ul>
<li>When creating/changing a post we add a keyword phrase to it.</li>
<li>We click on the “Bind to posts” button next to the keyword phrase.</li>
<li>Profit! Links to the post are already available on other website pages.</li>
</ul>
In the <a href="https://theluckywp.com/product/wiki-linking/" rel="nofollow ugc">premium version</a> the second step can be skipped — links will automatically be created!
<h4>Features</h4>
<ul>
<li>Up to 30 keyword phrases for the entire website (In the <a href="https://theluckywp.com/product/wiki-linking/" rel="nofollow ugc">premium version</a> the number of keyword phrases is unlimited) and unlimited number of links to them.</li>
<li>The links is displayed ONLY on the single page of a post, in all other places (RSS feed, the editor on the control panel and etc.) this link will NOT be displayed.</li>
<li>Placing of links in the posts and the pages.</li>
<li>Placing of links in custom post types.</li>
<li>Support of links to third-party websites for keyword phrases.</li>
<li>Access to the functionality of the plugin is only for the administrator (the <a href="https://theluckywp.com/product/wiki-linking/" rel="nofollow ugc">premium version</a> also allows to configure the access for other roles).</li>
<li>Adding of keyword phrases while editing a post.</li>
<li>View the list of posts in which the link is placed.</li>
<li>Statistics on the number of links to the keyword phrase.</li>
<li>Number of links to the keyword phrase can be set.</li>
<li>Number of links in a post for each post type can be set separately.</li>
</ul>

LuckyWP Wiki Linking

The plugin allows to easily organize a linking in the wiki style on the website.

Rajkumar

RK Smart Internal Linker analyzes your content in real time and suggests the most relevant internal posts to link to — right inside the Gutenberg sidebar. No external APIs, no monthly fees, no data leaving your server.
How it works:
<ol>
<li>On activation, the plugin creates a keyword index table and begins indexing your published posts via WP-Cron (20 posts every 5 minutes).</li>
<li>When you open a post in the editor, the plugin extracts the top keywords and scores every other post by keyword overlap (TF-IDF).</li>
<li>The top 5 results appear in a sidebar panel with Copy Link and Insert Link buttons.</li>
</ol>
Features:
<ul>
<li>100% local — no API keys, no external calls</li>
<li>TF-IDF keyword scoring for smart relevance</li>
<li>Background indexing via WP-Cron (server-friendly batches)</li>
<li>Instant re-index on post save</li>
<li>Clean Gutenberg sidebar with score badges</li>
<li>One-click copy or insert links</li>
</ul>

RK – Smart Internal Linker

A lightweight, zero-API internal link suggestion engine for the Gutenberg editor. Uses local TF-IDF keyword scoring to surface relevant posts while yo …

LuckyWP Wiki Linking vs RK – Smart Internal Linker