Docs checked API New
Copyscape
Duplicate content search that finds copies of a web page or text elsewhere online.
Plagiarism & Originality Checkers from USD 0.03
Plagiarism & Originality Checkers
Similarity engines that compare a document against the web, journals and student archives. Plagiarism detection and AI detection answer different questions, and conflating them is the most common mistake in this field.
| Tools in this category | 10 |
|---|---|
| With a price read at the source | 8 |
| With a free tier | 6 |
| Reviewed hands-on | 0 |
Docs checked API New
DupliChecker
Free web-based plagiarism checker with paid search-and-word packages and API access.
Plagiarism & Originality Checkers from USD 9.99
Docs checked New
Grammarly Plagiarism Checker
Plagiarism detection built into Grammarly's writing assistant, included with Pro plans.
Plagiarism & Originality Checkers from USD 12.00
Docs checked New
iThenticate
Originality screening for researchers and publishers checking manuscripts before publication.
Plagiarism & Originality Checkers from USD 125.00
Docs checked New
Plagiarism Checker X
Desktop plagiarism and text-similarity software sold as a one-time perpetual licence.
Plagiarism & Originality Checkers from USD 39.95
Docs checked API New
Plagiarism Detector
Online plagiarism checker with a free tier, paid word packages and a developer API.
Plagiarism & Originality Checkers from USD 20.00
Docs checked API New
Quetext
DeepSearch plagiarism checker with AI detection, citation assistant and bulk uploads.
Plagiarism & Originality Checkers from USD 14.99
Docs checked New
Scribbr Plagiarism Checker
Per-document plagiarism check for students, priced by word count rather than subscription.
Plagiarism & Originality Checkers from USD 19.95
Established API New
Turnitin Similarity
Similarity checking that compares submissions against student papers, publications and web content.
Plagiarism & Originality Checkers Price on request
Listed API New
PlagiarismCheck.org
Plagiarism and AI detection for individuals and organizations, with LMS add-ons and an API.
Plagiarism & Originality Checkers Price on request