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Best Free WordPress Plugins for Testing And Cro

15 plugins compared · Updated August 2026 · A/B Testing & Conversion Optimisation

All 15 Free only Premium only

Choosing a WordPress plugin for testing and cro comes down to a few things: whether it is still actively maintained, whether real users rate it well, and whether it does the specific job you need without dragging the rest of the site down.

We ranked 15 plugins using our WPScore, which weighs the user rating (adjusted for how many people actually rated it), how many sites run it, how recently it was updated, and which WordPress version it is tested against. 15 of them have enough public data to be scored; the rest are listed below the ranked block, clearly marked, rather than being given a number we cannot justify.

How this list is funded. Some links here earn us a commission if you buy. It costs you nothing extra, and it does not move anything up the list — the order comes from the WPScore, which is calculated from public ratings, install counts and update history. See the method.

At a glance

  1. 1. Popup Builder Best overall 89/100
  2. 2. Fluid Checkout for WooCommerce 89/100
  3. 3. Nelio A/B Testing 84/100
  4. 4. EasyTest 83/100
  5. 5. Notivo Notification for WooCommerce 81/100
  6. 6. Split Test For Elementor 81/100
  7. 7. Sigmize: A/B Testing, Session Recordings, Heatmaps & Revenue... 79/100
  8. 8. YITH WooCommerce Gift Cards 78/100
  9. 9. My WP A/B Testing 77/100
  10. 10. Personizely 76/100
  11. 11. Sales Counter For WooCommerce 76/100
  12. 12. Zlick Paywall 76/100
  13. 13. Moosend Website Connector 74/100
  14. 14. LIQUID CONNECT 70/100
  15. 15. AI Flash Tune 70/100
1 Popup Builder
Best overall Free by popupbuilder

Popup Builder

Increase Sales, Lead Generation, Conversion rates and receive good Call to Action rates with smart WordPress popup plugin.

4.7★
from 2,213 ratings
200k+
active installs
Updated
Jul 2026
Tested to
WP 7.0.4
89

WPScore

Read review View on WordPress.org
2 Fluid Checkout for WooCommerce
Free by Diego Versiani

Fluid Checkout for WooCommerce

Frictionless Multistep Checkout for WooCommerce. Get up to 36% increase in conversion rates with a better purchase experience at the checkout page.

4.9★
from 158 ratings
20k+
active installs
Updated
Aug 2026
Tested to
WP 7.1
89

WPScore

Read review View on WordPress.org
3 Nelio A/B Testing
Free by Nelio Software

Nelio A/B Testing

A/B Testing, conversion rate optimization, and beautiful Heatmaps with AI Assistance.

4.8★
from 97 ratings
4k+
active installs
Updated
Aug 2026
Tested to
WP 7.1
84

WPScore

Read review View on WordPress.org
4 EasyTest
Free by WP Grids

EasyTest

A/B test your WordPress pages, headlines and buttons. Split your traffic, track conversions, and see which version actually wins.

5★
from 1 ratings
10k+
active installs
Updated
Aug 2026
Tested to
WP 7.0.4
83

WPScore

Read review View on WordPress.org
9 My WP A/B Testing
Free by Jb Audras

My WP A/B Testing

An easy way to set up A/B Testing Campaigns using Gutenberg blocks, and to get the conversion rates for each variation.

4.7★
from 3 ratings
200+
active installs
Updated
Aug 2026
Tested to
WP 7.1
77

WPScore

Read review View on WordPress.org
10 Personizely
Free by Sergiu Cazac

Personizely

Personizely is a Conversion Optimization Toolkit that helps you boost engagement and sales through A/B testing, website personalization, and popups.

4.8★
from 25 ratings
300+
active installs
Updated
Mar 2026
Tested to
WP 6.9.7
76

WPScore

Read review View on WordPress.org
11 Sales Counter For WooCommerce
Free by Themepoints

Sales Counter For WooCommerce

Boost store conversion rates by adding real-time sales counters, customizable timeline filters, dynamic milestone badges, and low-stock urgency alerts …

5★
from 1 ratings
100+
active installs
Updated
Jun 2026
Tested to
WP 7.0.4
76

WPScore

Read review View on WordPress.org
12 Zlick Paywall
Free by Zlick

Zlick Paywall

Sell subscriptions and one-off access to your content with industry-leading conversion rates, a simple platform to operate, and no upfront costs.

5★
from 10 ratings
100+
active installs
Updated
Jul 2026
Tested to
WP 6.9.7
76

WPScore

Read review View on WordPress.org
13 Moosend Website Connector
Free by moosend

Moosend Website Connector

Improve your conversion rates with cart abandonment and product recommendations emails with a click of a button. Track website behaviour of all visito …

3★
from 4 ratings
1k+
active installs
Updated
Jun 2026
Tested to
WP 6.8.8
74

WPScore

Read review View on WordPress.org
14 LIQUID CONNECT
Free by lqd

LIQUID CONNECT

Chatbot with customer insight analysis, A/B test banners / modals, plus an AI assistant that manages your site in natural language.

400+
active installs
Updated
Jul 2026
Tested to
WP 7.0.4
70

WPScore

Read review View on WordPress.org
15 AI Flash Tune
Free by rbill

AI Flash Tune

Find WooCommerce revenue leaks, understand funnel drop-offs, and see what to check first with local insights plus optional AI action plans.

300+
active installs
Updated
Aug 2026
Tested to
WP 7.0.4
70

WPScore

Read review View on WordPress.org