PluginSift
PluginsThemesCompare
Directory
  • Plugins
  • Themes
  • Compare Plugins
Plugin Comparisons
  • SEO
  • Security
  • Ecommerce
  • Page Builders
  • Caching
  • Backup
  • Forms
  • Analytics
Resources
  • About
  • Contact
  • llms.txt

© 2026 PluginSift. Data sourced from WordPress.org. · [email protected]

  1. Home
  2. Plugins
  3. Unique
  4. Copyscape Premium
Copyscape Premium icon

Copyscape Premium

The Copyscape Premium plugin lets you check if a WordPress post is unique before it's published, by searching for duplicate content on the web.

By Copyscape·Unique·Free
3.2(10 reviews)
·1.0K+ active installs·Updated 3 months ago
DownloadVisit HomepageCompare

As of April 2026, Copyscape Premium is a WordPress unique plugin with 1.0K+ active installations and a 3.2/5 rating from 10 reviews. It has been downloaded 53K+ times in total. Requires WordPress 3.0.1+ and PHP false+. Available on WordPress.org since 2013. Downloads are up 32% this week. Top alternative: Advanced Custom Fields: Unique ID Field.

3.2/510 reviews
1.0K+active installs
53K+total downloads
13 yearssince 2013

Overview

The Copyscape Premium plugin lets you check if a WordPress post is original before it’s published, by using the Copyscape Premium API to check for duplicate content on the web.

The plugin will add a ‘Copyscape Check’ button to your WordPress interface, allowing you to check your posts whenever you wish. You may also set the plugin to automatically check your posts when you click ‘Publish’ and/or ‘Update’.

When duplicate content is found, a report of matching pages is shown. You may also see a detailed comparison that highlights your content on the found page.

If you do not already have a Copyscape Premium account, please sign up, purchase some credits, and enable your API access. You may then begin using the plugin.

Read full description on WordPress.org

Screenshots

Ratings & Reviews

3.210 reviews
5 ★
4
4 ★
2
3 ★
0
2 ★
0
1 ★
4

Recent Reviews

The plugin is not working
by Просування сайтів·1 year ago

The plugin is not working. I paid for the service, checked all the settings. After pressing the check button, the page is updated, but nothing changes, and the limits are not written off.

  • This topic was modified 1 year, 1 month ago by Просування сайтів.
worthless plugin, reporting cookie consents as plagiarism
by dorianrochowski·2 years ago

I’ve spent 15$ to get hundreds of matches for… cookie consent pop-up. What a BS.

The plugin works great for detecting plagiarism
by Excess Pro Net·3 years ago

I personally installed the plugin in my site to detect plagiarised content that i did not notice before. and well just for 10$ I got almost unlimited credits to check for it on product and posts pages. The tool is perfect detecting spam. The only thing is that it also autodectects the same website content as duplicate. And also after saving Twice, The plugin conflicts a little with wpml plugin and changes the language of the post which damages the page. Though i need the plugin and still works. I hope others check this great tool to fight the latest google spam updates more easily. and I hope the author can do a great update for this great plugin!!!!

very good, could be even better
by fff654·3 years ago·1 reply

You need to register and pay for the API, no complain, this is clearly said before even installing, so all good here (user complaining on that is unfair)
The plugin is very easy to install and use
Admin and user setting are very good
Many options to check plagia when user want … but it is pushing to sell more 😉 … and that can cost very quicly several dollars per articles if you don’t pay (pun intended) attention

So please, copyscape team:
– optional: by defaut, deactivate all automatic checks. Users may select them back
– nice to have: do indicate the remaining credit on the account in the post edit page
– a must: do indicate how much credits it will cost to check, BEFORE CHECKING

A must plugin for serious writer
by yesorcayes·5 years ago

A must plugin for serious writer

Download Trends

Today: 16Yesterday: 50This week: 278Period total: 12K

Compatibility

WordPress3.0.1+ requiredTested up to 6.9.4
PHPfalse+ required

Version Adoption

v1.4
81.5%
v1.3
15.7%
v1.0
2.8%

Top Alternatives to Copyscape Premium

Advanced Custom Fields: Unique ID Field icon
Advanced Custom Fields: Unique ID Field
53.0K+ installsUpdated 11 years ago
ViewCompare
Overwrite Uploads icon
Overwrite Uploads
3.41.0K+ installsUpdated 8 months ago
ViewCompare
Unique Submissions for Elementor Forms icon
Unique Submissions for Elementor Forms
3500 installsUpdated 1 year ago
ViewCompare
Unique Uploaded Media Name icon
Unique Uploaded Media Name
5100 installsUpdated 6 years ago
ViewCompare
WP-Parsi Statistics icon
WP-Parsi Statistics
530 installsUpdated 12 years ago
ViewCompare
View all unique plugins →

Frequently Asked Questions

Changelog

1.0

First released version.

View full changelog on WordPress.org

Contributors

CopyscapeCopyscape
Plugin Info
Version
1.4.2
Last Updated
Dec 24, 2025
WP Requires
3.0.1+
Tested Up To
6.9.4
PHP Requires
false+
Active Installs
1.0K+
Downloads
53K+
Added
Apr 29, 2013
Business
Free

Tags

uniqueoriginalcopyscapeplagiarismduplicate content

Developer

C
Copyscape
1 plugins0.0M+ total installs
View all plugins →

Quick Compare

Copyscape Premium vs Advanced Custom Fields: Unique ID Field→Copyscape Premium vs Overwrite Uploads→Copyscape Premium vs Unique Submissions for Elementor Forms→

Plugin data sourced from WordPress.org. Analysis and metrics by PluginSift.