Link&Cluster vs Linkagent

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.

Linkagent crawls websites to identify missing internal links and add links after users approve them. Links can be delivered through a script, WordPress plugin, or JSON API. Its analysis reads a sitemap and maps topics, clusters, orphan pages, click depth, and the in-text link graph. Suggested anchor phrases come from existing page copy, and optional AI review checks them against their original sentence. Crawling, clustering, scoring, and anchor selection work without an AI key; a Claude API key enables additional review. Users approve or reject suggestions, and those decisions persist across re-crawls. Suggestions are balanced at roughly one new link per 250 words, with limits on new inbound links and repeated anchor use. The asynchronous embed script is about 2 KB and wraps existing text without adding or moving page content. Linkagent supports WordPress, Next.js, Shopify, Webflow, and other CMSs. Self-hosting keeps content, link graphs, and review decisions in the user's own Postgres database. Self-hosting costs nothing and requires your infrastructure; hosted plans start at $29 a month.