- Web Plagiarism Detection: Scans the internet to find exact and near-duplicate copies of your content.
- Copyscape Premium: Advanced searches with copy-paste input, file uploads, and deeper indexing.
- Batch & Site Search: Check up to 10,000 pages in a single operation for large websites.
- API Access: Automate plagiarism checks within CMS, editorial, or AI content workflows.
- Copysentry Monitoring: Continuously monitors the web and sends alerts when new copies appear.
Copyscape Plagiarism Checker
Enterprise-grade plagiarism detection for web, documents, and AI-generated content
Updated August 11, 2026
Copyscape Plagiarism Checker Overview
Copyscape searches the public web for copies of online or uploaded text. Writers and publishers can check a passage or document, run larger site searches, and monitor published pages for new matches.
It works best for web-copy detection and ongoing content monitoring. It does not provide the same private student-paper repository or instructor workflow as an academic similarity system.
Key Features
Pricing
| Plan | Price | What is included |
|---|---|---|
| Free comparison | $0 | Compare two web pages or text passages |
| Premium | $0.03 per search for the first 200 words, then $0.01 per additional 100 words | Paste text or upload PDF and Word files |
| Copysentry / Enterprise | Custom quote | Recurring monitoring or private deployment |
Pricing source: official pricing page.
Pros
Compared with |
Why this product may fit better |
|---|---|
| Grammarly | Copyscape charges by search and is aimed at finding copied web text. Grammarly is a writing assistant first, so Copyscape can be a better fit for publishers who only need originality checks. |
| Quetext | Copyscape can check a live URL and Copysentry can watch pages for new copies. Quetext focuses more on documents and student writing than ongoing web monitoring. |
| Siteliner | Copyscape Premium accepts pasted text and document uploads, and it also offers an API. Siteliner is useful for duplicate pages within one site, while Copyscape searches beyond the site itself. |
Cons
Compared with |
Where this product may fall short |
|---|---|
| Grammarly | Grammarly also helps with grammar, tone and rewriting while a person writes. Copyscape is much narrower and does not replace a daily writing assistant. |
| Quetext | Quetext gives users a similarity report built around documents, citations and academic writing. Copyscape is strongest on web copies and has less of an education workflow. |
| Siteliner | Siteliner makes it easy to inspect duplicate content and page issues across a single website. Copyscape charges for Premium searches and may be less convenient for a quick internal site audit. |
Reviews
- Originality.ai review: Originality.ai's competitor-published test gave Copyscape strong marks for speed, price and overall matching, while calling the interface dated. Its conclusions come from the publisher's own test, not a user-review aggregate.
- Trustpilot: TrustScore 2.5/5 from 6 reviews. Recent reviewers describe missed matches and AI-detection results they did not trust, while older comments include more positive experiences. Six reviews are too few to treat the score as a broad verdict.
- Tamzid Ahmed review: The author says three years of daily use worked well for exact or near-exact web copies and liked the pay-as-you-go model. The same review calls the reports functional but dated and notes the lack of clear similarity percentages.
- Reddit r/freelanceWriters: One freelancer argues that a Copyscape requirement is a low bar for judging writing quality. The same comment says plagiarism checkers did confirm copied work whenever the editor already had reason to suspect it. Apify recovered the exact comment and matched post rd2ovc.
