NexPlugin is a modular WordPress plugin ecosystem for SEO, table of contents, and internal linking -- free core tools on WP.org, paid plans from $79/yr.
NexPlugin is a small, WordPress-focused engineering team building a connected ecosystem of SEO plugins, a performance theme, and block tools. Two products are live today: NexIndex, a zero-config table-of-contents plugin with five built-in skins, dual-mode heading detection, and a mobile-first reading-progress widget; and NexLink, an on-server internal-linking engine that finds orphan pages, audits broken and 'parasite' links, scores overall link health (0-100, A-F grade), and suggests keyword-to-URL links directly inside the Classic Editor and Gutenberg -- all without sending data to an external cloud service. Both plugins are free and GPLv2-licensed on WordPress.org. The wider ecosystem also includes NexMeta and NexSchema (meta/schema plugins marked 'Coming Soon'), plus a Nexeo performance theme and NexBlocks block library (also 'Coming Soon'). Paid Pro plans unlock the unified NexSEO Dashboard, priority support, and, on the top tier, white-label access for agencies managing unlimited sites.
Key Features
Auto-Generated Table of Contents — Scans H2-H4 or inline news-style headings and auto-builds an anchored, styled TOC on desktop and mobile with no shortcodes.
5 Built-in Skins — Glass, Notion, Midnight, Minimal, and Card styles switch the whole TOC look from one setting.
Mobile-First Widget — A floating icon or bottom bar opens an off-canvas drawer, plus a reading progress bar across the top.
Smart SEO Anchors — Clean, stop-word-stripped anchor slugs (English and Indonesian) for shareable, SEO-friendly heading links.
Automated Internal Linking — Up to 25 keyword-to-URL rules with anchor-text variation; links appear automatically at render time, non-destructively.
Orphan & Opportunity Finder — Surfaces unlinked posts and high-value pages that deserve internal links.
Broken & Parasite-Link Audit — Scans for broken/404 links and unwanted parasite links across the site.
Site Health Score — A 0-100 score with an A-F grade for overall internal-linking health.
Click Analytics — Shows which internal links actually get clicked, with a 30-day chart.
On-Server NLP Engine — Porter stemmer plus EN/ID stopwords and TF-IDF, indexed via WP-Cron -- no external API or data sent to the cloud.
Architecture Map — An interactive vis-network map visualizing the site's internal link structure.
WP-CLI & REST API — Full WP-CLI commands and REST API (v1 & v2) for developers, plus GDPR tooling.
Pros & Cons
Pros
Core plugins (NexIndex, NexLink) are free and GPLv2-licensed with no forced upgrade prompts
Runs entirely on the customer's own server -- no content or link data sent to an external cloud service
NexLink bundles orphan-page detection, broken/parasite-link auditing, and a 0-100 Site Health Score in one plugin
30-day money-back guarantee and no-contract, cancel-anytime billing on paid plans
Cons
Several ecosystem products -- NexMeta, NexSchema, the Nexeo theme, and NexBlocks -- are still labeled 'Coming Soon' and not yet available
Only two of the seven advertised ecosystem products (NexIndex and NexLink) are currently shipped
Small team with a limited public track record and no visible customer reviews or case studies on the site at time of review