10 Best Nelio A/B Testing Alternatives in 2026
Updated October 22, 2026 · Ranked by how closely each plugin matches, from WordPress.org data · How this works
Nelio A/B Testing has 4,000+ active installs on WordPress.org. These 10 plugins share its category or its tags on WordPress.org, are actively maintained, and each has at least 100 active installs. They are ordered by how closely they match, not by our opinion.
The 10 closest alternatives to Nelio A/B Testing
- 1
Optimus
Closest matchOptimus – WordPress Image Optimizer
4.2 (69) 30,000+ active installsEffective image compression and optimization during the upload process. Smart, automatic and reliable.
About 7.5 times the installs, rated 4.2 against 4.8, last updated March 2, 2026.
- 2
4.3 (106) 20,000+ active installsAutomatically detect external images in the post content and import images to your site then adding to the media library and replace image urls.
About 5 times the installs, rated 4.3 against 4.8, last updated September 20, 2026.
- 3
Photo Gallery by Supsystic – Image Gallery, Masonry, Albums & Lightbox
4.6 (498) 20,000+ active installsResponsive photo and image galleries with masonry, albums and a lightbox. Bulk upload, drag-and-drop ordering, Gutenberg block and Elementor widget.
About 5 times the installs, rated 4.6 against 4.8, last updated 6 days ago.
- 4
4.5 (248) 30,000+ active installsCreate stunning responsive sliders in minutes. Drag-and-drop builder, unlimited sliders, mobile-friendly & SEO optimized!
About 7.5 times the installs, rated 4.5 against 4.8, last updated August 10, 2026.
- 5
Robo Gallery – Photo & Image Slider
4.3 (405) 40,000+ active installsRobo Gallery is a powerful image gallery and photo gallery plugin with advanced features to create responsive galleries with a beautiful lightbox
About 10 times the installs, rated 4.3 against 4.8, last updated 16 days ago.
- 6
Clearfy Cache – WordPress optimization plugin, Minify HTML, CSS & JS, Defer
4.7 (339) 40,000+ active installsOptimize and tweak WordPress by disable unused features. Improve performance, SEO and security using Clearfy — super easy, fast and zero code.
About 10 times the installs, rated 4.7 against 4.8, last updated July 23, 2026.
- 7
4.6 (162) 30,000+ active installsTurn each product variation's photos into a fully controllable gallery — thumbnail layout, slider, zoom, and mobile sizing, no theme hacks.
About 7.5 times the installs, rated 4.6 against 4.8, last updated 23 days ago.
- 8
ShortPixel Adaptive Images – WebP, AVIF, CDN, Image Optimization
4.8 (145) 10,000+ active installsStart serving properly sized, smart cropped & optimized images, plus CSS, JS and fonts from our CDN with a click; Automatic AVIF & WebP support.
About 2.5 times the installs, last updated August 20, 2026.
- 9
WP Meteor Website Speed Optimization Addon
4.7 (77) 20,000+ active installs2x-5x improvement in your Page Speed score. A completely new way of optimizing your page speed.
About 5 times the installs, rated 4.7 against 4.8, last updated 19 days ago.
- 10
CompressX — AVIF & WebP Converter, Media Replacement
5.0 (197) 40,000+ active installsAVIF & WebP converter with built-in media replacement for local image optimization.
About 10 times the installs, rated 5.0 against 4.8, last updated 15 days ago.
Switching from Nelio A/B Testing: common questions
What is the best alternative to Nelio A/B Testing?
Optimus is the closest match: it shares the same WordPress.org tags and has 30,000+ active installs with a 4.2 out of 5 rating.
Which Nelio A/B Testing alternative has the most users?
Robo Gallery, with 40,000+ active installs reported by WordPress.org.
Which Nelio A/B Testing alternative is rated highest?
CompressX, rated 5.0 out of 5 by 197 reviewers. Only plugins with at least 50 reviews are counted.
Are these Nelio A/B Testing alternatives free?
Every plugin listed here is free to install from WordPress.org. Where WordPress.org marks a plugin as commercial, the developer also sells a paid version or add-ons, and that is shown on each plugin.
How are alternatives chosen?
Automatically, from WordPress.org data: plugins that share a category top 10 with Nelio A/B Testing score highest, then plugins that appear in the same WordPress.org rankings, then plugins with the same tags, weighted so rare tags count more than common ones. Plugins by the same author and plugins rated under 4.0 are left out.
How we choose these alternatives
Nothing on this page is picked by hand. Every day we walk the whole WordPress.org directory, then score every plugin against Nelio A/B Testing on three signals: sharing a category top 10 counts most, then appearing in the same WordPress.org rankings, then carrying the same tags, with rare tags counting for more than common ones like "wordpress". Plugins by the same author are excluded, so an author's own add-ons cannot fill the list, and so is anything rated below 4.0 or with fewer than 100 active installs. The ten highest scores are what you see, in that order. Full methodology.
The bottom line
Optimus is the closest match to Nelio A/B Testing by the data we track, and Robo Gallery has the widest reach with 40,000+ active installs. Photo Gallery by Supsystic shipped the most recent release, on October 16, 2026. The list is rebuilt every day from WordPress.org, so a plugin that stops being maintained drops out on its own.
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What moved this week
One email a week, built from the same daily snapshots these rankings come from: the plugins that climbed, what launched, and one ranking worth a look.