Nelio A/B Testing – AB Tests and Heatmaps for Better Conversion Optimization vs Smush – Image Optimization, Compression, Lazy Load, WebP & CDN

Test, learn, and grow with data-driven insights Nelio A/B Testing is an extremely powerful and easy-to-use A/B Testing and Conversion Optimization plugin for WordPress. Create, manage, and analyze tests directly from your WordPress dashboard — no external tools, coding, or data exports required. With Nelio A/B Testing, you can test pages, posts, headlines, menus, widgets, WooCommerce products, themes, CSS, synced patterns, and more. Understand how visitors behave with heatmaps, clickmaps, and scrollmaps, and make data-driven decisions that actually improve conversions. “Nelio A/B Testing has been a game changer for our web strategy. It empowered us to make decisions based on data, not instinct. The simplicity, affordability, and impact have been exceptional.” Quentin Molinié, Co-founder of Darwin Nutrition | Case Studies 🚀 Why Choose Nelio A/B Testing? Built for WordPress. Unlike external SaaS tools, Nelio integrates natively into your dashboard and page builder for a seamless experience and instant setup. Data-Driven Decisions, Simplified. Design tests, view results, and apply winners automatically, all without writing a single line of code (if you don’t want to). Privacy & Performance First. No personal data stored and fully compatible with caching and optimization plugins. We Listen and Evolve. Your feedback directly shapes our roadmap. If you need a feature, tell us, and we’ll do our best to make it happen. 💡 Features at a Glance A/B and Multivariate Testing. Test completely different layouts or subtle design tweaks to find out what converts best. Heatmaps & Scrollmaps. Visualize how users interact with your content. Automatic Winner Deployment. Let Nelio automatically apply the best-performing variation for you. WooCommerce Ready. Test product titles, images, prices, and layouts to maximize sales. AI-Assisted Test Suggestions. Get personalized test ideas to improve engagement and conversion. Segmentation & Targeting. Test experiences by device, referrer, location, or behavior. GDPR & Privacy-Friendly. No personal data stored, fully compliant with EU regulations. Performance-Aware. Optimized for caching and minimal page load impact. Detailed Reports with Comprehensive Analytics. Conversion rates, confidence levels, and visitor stats. Compatible with Page Builders. Works with Gutenberg, Elementor, and more. Multisite & Localization Support. Fully compatible with multisite networks and translated into multiple languages. Actively Maintained & Supported. Frequent updates, detailed documentation, and responsive support. 🧪 What You Can Test Pages and Posts Headlines Content Templates WordPress Synced Patterns Menus and Widgets WooCommerce Products and Pricing Custom JavaScript and CSS Snippets Entire Site Designs Custom Post Types Popups PHP Hooks (for devs) 🔒 GDPR-Compliant & Privacy-Friendly We take privacy seriously. Nelio A/B Testing does not store personal data and complies with the GDPR and the CCPA. You can use it confidently in any region. 💰 Free vs Premium Start with the free version (supports up to 500 tested page views per month) to run basic tests and heatmaps on smaller sites. Upgrade to a premium plan to unlock advanced features, higher traffic limits, and priority support. Nelio A/B Testing — The native WordPress solution for A/B testing, heatmaps, and conversion optimization.

Compress images, optimize images, and enable image lazy load automatically with the powerful Smush image optimizer to keep your WordPress site fast, without losing quality. Smush makes it easy to optimize images, compress images, and deliver images faster across your entire WordPress site. This all-in-one image optimizer automatically reduces image file sizes, enables image lazy load, and serves modern formats like WebP and AVIF, all without breaking image quality or adding extra work. Whether you’re running a blog, store, or portfolio, Smush helps you optimize images at scale and keep your site fast with a trusted WordPress image optimizer. Trusted by 1+ Million Sites | 4.8/5 Star Rating Get everything you need to optimize images and speed up your site. Smush works out of the box with no complicated setup – just install and let it handle the rest. Compress images without losing quality Reduce image file size automatically while keeping your images sharp and clear. Smush is an easy-to-use image optimizer which let’s you compress images using both lossless and lossy compression, giving you the best balance of quality and performance without extra work. You can also compress images outside the media library using Directory Smush, making it easy to optimize images stored in theme folders, plugins, or other directories on your server. Lazy load images for faster pages Enable image lazy load across your site so images load only when needed. This image optimizer improves initial page speed and creates a smoother experience for visitors without extra configuration. Serve WebP and AVIF images automatically (PRO) Convert images to WebP and AVIF and serve them automatically to supported browsers. Smush helps you optimize images using next-gen formats to reduce file size and improve load times across your WordPress site. Deliver images faster with an Image CDN (PRO) Serve images through a global image CDN to reduce latency and improve load times for visitors around the world. 119 global CDN servers Up to 500 GB of bandwidth Faster image delivery based on visitor location Improved performance for image-heavy and high-traffic sites Automatically resize and fix image dimensions (PRO) Eliminate common PageSpeed warnings and improve layout stability with automatic image sizing. Smush dynamically resizes images to perfectly fit their containers, regardless of original size, helping fix the “Properly size images” warning in Google PageSpeed Insights. It also automatically adds missing width and height attributes to your images, improving rendering speed and reducing layout shifts. This helps you meet the “Ensure images have explicit width and height” recommendation without any manual work. Optimize your entire site, automatically Smush works across your whole site as a powerful image optimizer to optimize images as you upload them and maintain performance over time without manual work. Optimize images automatically on upload Compress images in bulk or individually Works with your existing media library No need to re-upload images Enable image lazy load across your site Convert images to WebP and AVIF Deliver images with an integrated image CDN Automatically resize and serve correctly sized images Optimize images outside the media library with Directory Smush Built for performance Smush improves page speed and overall performance by reducing image weight and improving how images are delivered. Reduce page load times Improve user experience Better performance for image-heavy pages Supports image lazy load and preload images (PRO) for faster perceived performance Works with your existing setup Smush is built to work with your current WordPress setup, including popular themes, page builders, and plugins. Compatible with Gutenberg, Elementor, WPBakery, and more Works with WooCommerce stores No need to change your workflow Easy to enable and configure Designed to be simple You don’t need to be a performance expert to optimize images with Smush image optimizer. Works out of the box Simple settings when you need them No technical knowledge required Safe to use on any site Why choose Smush? There are plenty of image optimization plugins, but Smush focuses on making it easy to optimize images, compress images, and improve performance without complexity. As a leading WordPress image optimizer, Smush gives you powerful optimization tools without the technical hassle. Trusted by over 1 million WordPress users Built specifically for WordPress Regular updates and improvements Backed by the WPMU DEV team Get started in minutes Install Smush, activate it, and start to compress images, optimize images, and enable image lazy load right away. This easy-to-use image optimizer helps most sites see improvements immediately without changing how they upload or manage images. About Us WPMU DEV is a premium supplier of quality WordPress plugins, services and support. Learn more here: https://wpmudev.com/ Don’t forget to stay up to date on everything WordPress from the Internet’s number one resource: WPMU DEV Blog Hey, one more thing… we hope you enjoy our free offerings as much as we’ve loved making them for you! Contact and Credits Originally written by Alex Dunae at Dialect (dialect.ca, e-mail ‘alex’ at ‘dialect dot ca’), 2008-11.