Link&Cluster vs Relinka

Link&Cluster is a self-hosted WordPress plugin for finding internal-link opportunities and organizing topical clusters. It highlights paragraphs where links to existing content may fit, and reports internal-link counts across posts with sorting and filtering. Clusters can use categories or custom taxonomies, with links inside those groups prioritized. The plugin can insert a related-posts box into other posts, and its design and wording can be customized. Starter is free at free and includes incoming internal-link counts, outgoing external-link counts and counts by category. Pro costs $44, paid once, billed as Buy once, with lifetime updates; it adds link opportunities, taxonomy counts, cluster assistance, one-click internal links and related-post boxes. Links embedded in Editor Mode are said to remain after uninstalling. Purchases include a 14-day money-back guarantee. Installation involves uploading the plugin to WordPress’s wp-content/plugins directory and activating it. Paid support is listed through the WordPress.org forum. The WordPress.org listing says the plugin has not been tested with the latest three major WordPress releases.

Relinka is a WordPress plugin for mapping posts and finding internal-link issues, including broken and orphaned pages. It shows inbound and outbound link counts, a link graph, keyword clusters, and a 0–100 internal-link health score based on orphaned posts, missing outbound links, and broken links. Suggestions include a plain-English reason and use anchor text taken word-for-word from the site's content; suggestions target pages that already exist. Users approve changes before application, and each applied link has a snapshot that can be reverted with one click. The free plugin runs on the site's own server without sending content, links, or analytics to Krafts, and it requires no account or API key. Pro adds AI or semantic suggestions, bulk application, and automatic linking for new posts. Pro AI features are opt-in and use third-party services; the maker says their quality is not guaranteed. Relinka supports Gutenberg and the Classic editor and protects page-builder posts from card insertion. Requirements are WordPress 6.4 or later and PHP 8.1 or later. The free plugin is open source under GPLv2 or later; Pro costs $59 a year for one site.