Yes, CartonBox is free to use. It is available as a free plugin on WordPress.org.

How many websites use CartonBox?

CartonBox has 10 active installations as tracked by WordPress.org.

What are the best CartonBox alternatives?

Popular alternatives to CartonBox include Popup Builder – Create highly…, Popup Box – Create Countdown, Coupon…, Boxzilla – Pop-Ups for WordPress. You can compare them side-by-side on our comparison pages.

Does CartonBox work with the latest WordPress?

CartonBox has been tested up to WordPress 4.9.29. It requires WordPress 4.0+ and PHP false+.

CartonBox – pop-up modal windows — Reviews, Rating & Alternatives (2026)

Name: CartonBox – pop-up modal windows
Author: Ruslan Heorhiiev

As of April 2026, CartonBox is a WordPress pop up plugin with 10 active installations and a 0/5 rating0. It has been downloaded 1.2K+ times in total. Requires WordPress 4.0+ and PHP false+. Available on WordPress.org since 2018. Last updated 5 years ago — may have compatibility concerns. Top alternative: Popup Builder – Create highly….