RelatIQ WordPress Plugin
Show truly accurate related posts with a privacy-first, on-site semantic engine.
Runs 100% on your server—no external APIs, zero data sharing, and completely free.
By Andreas Lazarou, Lead Security Engineer
Technically Reviewed by the VPNDeals Team • Updated February 2026
In short: RelatIQ is a 100% free, privacy-first WordPress plugin that uses an on-site semantic vector engine to display highly accurate related posts without relying on external APIs, ensuring zero data leaks and maintaining perfect site speed.
The Privacy-First AI That’s 100% Free
Explore the robust intelligence and speed built into RelatIQ. Our plugin is free forever, delivering truly relevant content using blazing-fast, private, on-site architecture.
⏱️ Instant Setup Wizard
A simple, guided wizard gets you set up, configured, and running your semantic engine in under a minute with our “Auto-Pilot” mode.
💎 100% Free, Forever
No premium versions, no pro-features, and absolutely NO upselling. Just a powerful, complete plugin. Our gift to the community.
🧠 Private Semantic AI
Finds truly relevant content using an on-site TF-IDF vector model. Zero data sharing or external API calls, ever. Everything stays in your database.
⚡ Zero TTFB Impact
Frontend results are served instantly from Object Cache / RAM. Heavy AI processing is entirely decoupled from your page load times.
Engineered for Enterprise Scale
RelatIQ v3.0 abandons heavy WordPress meta queries. We built a custom mathematical engine capable of handling 30,000+ posts without breaking a sweat.
Inverted Index Tables
No Postmeta
Say goodbye to bloated wp_postmeta. RelatIQ creates its own dedicated relational tables (`rltiq_vectors` & `rltiq_cache`) optimized with composite indexing for instantaneous cosine similarity matching.
Action Scheduler & WP-CLI
SSH Native
Processing tens of thousands of articles? No problem. Use our native wp relatiq rebuild_vectors CLI command to bypass PHP timeouts, or let the Action Scheduler chunk the workload safely in the background.
Zero-Lock Analytics
90-Day Pruning
Track real-time clicks directly in your DB without crashing it. We utilize native MySQL Table Partitioning to instantly drop analytical data older than 90 days—preventing massive database locks during cleanup.
Military-Grade Security
Cloudflare CIDR
Built for strict enterprise environments. RelatIQ features safe CSS injection (no raw < style > blocks), robust REST API DoS protection, and dynamic Trusted Proxy CIDR matching to prevent IP spoofing.
🖥️ The Live Studio
RelatIQ 3.0.0 introduces a true enterprise-grade dashboard, replacing boring checkboxes with fluid reactive components.
- 👁️ Live Preview Simulator: See exactly what your related posts will look like across desktop and mobile in real-time.
- 🎚️ Strictness Tuning: Adjust your semantic cosine similarity threshold from 0.05 (loose) to 0.99 (exact matching only).
- 🎨 Generative Fallback Art: Missing a featured image? RelatIQ automatically generates unique, fast-loading CSS gradient backgrounds based on the post title hash.
- 🏷️ Smart Post Chips UI: Exclude specific URLs or drop a “Post Chip” to guarantee a post is NEVER recommended.
❤️ Perfect Fit For
Sites wanting to boost engagement and page views with truly relevant content, without sacrificing site speed.
- 📰 Publishers & Bloggers: Keep readers on-site longer by showing them hyper-relevant articles they actually want to read next.
- 🔒 Privacy-Focused Admins: Perfect for admins who refuse to send user information to third-party APIs.
- ⚡ Speed-Focused Sites: Needs a powerful solution that won’t slow down the site with heavy database queries.
- 📈 Content Marketers: Intelligently link your content to increase user time-on-site and improve conversions.
Frequently Asked Questions
1. Is this plugin really 100% free? What’s the catch?
Yes — RelatIQ is 100% free. Forever.
No premium version. No “pro” add-ons. No locked features. No upsells.
Everything you see — the private AI engine, analytics, Live Studio, layouts, and advanced controls — is included for everyone at no cost.
There’s truly no catch.
If you’d like to support the project, the best way is simply to leave a review, share RelatIQ with others, or keep the small credit link enabled. It helps more people discover the plugin and allows us to keep building powerful features — while keeping RelatIQ completely free. 💚
2. I have 30,000+ posts. Will this crash my server?
Not at all! RelatIQ v3.0 is built for enterprise scale. Instead of forcing your browser to process data, it hooks into the WooCommerce-standard Action Scheduler to chunk vector calculations safely in the background. If you prefer the terminal, you can bypass the web server entirely using our custom WP-CLI command: wp relatiq rebuild_vectors.
3. Will this plugin slow down my website (TTFB)?
No. This plugin is architected for zero TTFB impact. All heavy “AI” processing and vector calculations happen asynchronously. On the frontend, RelatIQ serves pre-calculated HTML fragments directly from RAM (via Object Cache) or via its custom lightweight `rltiq_cache` table. It completely avoids expensive native WordPress postmeta queries.
4. What “AI” does this use? Does it send data to OpenAI?
The “AI” is 100% local and private. It uses a smart, on-site vector model to analyze your post titles and content (calculating localized Term Frequency / Inverse Document Frequency and Cosine Similarity). Your data never leaves your server. There are no external API calls, no data sharing, and no third-party dependencies.
5. I use Cloudflare. Will the Analytics tracking work?
Yes. RelatIQ’s REST API endpoint includes advanced Trusted Proxy CIDR matching. This means it natively understands when traffic is routed through Cloudflare, Fastly, or CloudFront, and correctly resolves the real user’s IP address for DoS protection without falling victim to HTTP header spoofing.
About the Author
Andreas Lazarou is the Lead Security Engineer at VPNDeals. With over a decade of experience in cryptographic protocols and network architecture, he specializes in identifying vulnerabilities in routing infrastructure and auditing enterprise deployments. He built the RelatIQ engine to provide a privacy-first, zero-data-leak semantic solution for WordPress.
💬 Need Help? We’re Here.
Got questions or feedback regarding RelatIQ? Reach out via our support page anytime. We’re always improving and listening to user ideas.
🔒 Disclaimer
RelatIQ is provided 100% free and “as is,” without any warranty or guarantee of any kind. While the plugin has been built to the highest standards of performance and compatibility, the author assumes no liability for any direct or indirect damages, data loss, or site issues that may result from its use or misuse. We strongly recommend you create a full and complete backup of your website and database before installing this plugin and, most importantly, before using any of its maintenance tools.