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
Docs checked
Grammarly Plagiarism Checker
Plagiarism detection built into Grammarly's writing assistant, included with Pro plans.
Outbound link marked rel="nofollow". We earn nothing from this click unless the
listing is marked as an ad, and even then the link is labelled, not disguised.
Not tested yet
No detector-panel result exists for Grammarly Plagiarism Checker. Anything on this page about detectors below is the vendor's own claim, not a measurement. Ask us to test it, or run the procedure yourself.
The facts we hold
| Category | Plagiarism & Originality Checkers |
|---|---|
| Price model | Freemium · from USD 12.00 Source: vendor page , read 2026-09-20 |
| Free allowance | Not stated |
| Works without an account | No |
| Developer API | Not stated |
| Browser extension | Yes |
| Languages | 1 |
| Vendor | Grammarly, Inc. (US) |
| Added to the directory | 2026-09-20 |
| Vendor pages read on | 2026-09-20 |
"Not stated" means the vendor does not publish it, or publishes it somewhere we could not read at the source. It is not a judgement, and we do not fill the gap with an estimate.
No score yet, and here is why
A score on this site means a person used the tool, ran the fixed test texts through 6 detectors and published the numbers with a date. That has not happened for Grammarly Plagiarism Checker. What has happened: we read the vendor’s own pages and recorded the price and the limits with a link and a date. Those are above.
Vendors can ask for a review. Buyers can ask for one too - tell us which tool you need checked.
Others in Plagiarism & Originality Checkers
All of them → 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
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