Ahrefs AI Content Detector
Free no-signup AI content detector for short text, part of Ahrefs' free SEO writing tools.
Institution-only AI writing indicator built into Turnitin's similarity reports and LMS integrations.
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No detector-panel result exists for Turnitin AI Writing Detection. 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.
| Category | AI Detectors |
|---|---|
| Price model | Paid Source: vendor page , read 2026-09-20 |
| Free allowance | Not stated |
| Works without an account | No |
| Developer API | Not stated |
| Browser extension | Not stated |
| Languages | 4 |
| Vendor | Turnitin, LLC (US) |
| Added to the directory | 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.
“we strive to maximize the effectiveness of our detector while keeping our false positive rate ... under 1% for documents with over 20% of AI writing”
Source: the vendor's own page.
No accuracy figure on this site has been independently audited, and every detector produces false positives on genuine human writing. Treat a detection result as a reason to look closer, never as proof.
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 Turnitin AI Writing Detection. What is above is what the vendor says about itself.
Vendors can ask for a review. Buyers can ask for one too - tell us which tool you need checked.
Free no-signup AI content detector for short text, part of Ahrefs' free SEO writing tools.
Enterprise AI and plagiarism detection in one report, with LMS integrations and 30+ language support.
Free English-only AI content detector offered alongside Crossplag's cross-language plagiarism checker.
Free no-login AI detector handling up to 200,000 characters with shareable online or PDF reports.
Free AI detector taking 15,000 characters per scan without signup, plus detector and humanizer APIs.
Free AI detector from Grammarly returning a percentage AI score, with a Pro agent for flagged phrases.