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Ahrefs AI Content Detector
Free no-signup AI content detector for short text, part of Ahrefs' free SEO writing tools.
AI Detectors from USD 0.00
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Grammarly AI Detector
Free AI detector from Grammarly returning a percentage AI score, with a Pro agent for flagged phrases.
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Not tested yet
No detector-panel result exists for Grammarly AI Detector. 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 | AI Detectors |
|---|---|
| Price model | Freemium · from USD 12.00 Source: vendor page , read 2026-09-20 |
| Free allowance | Not stated |
| Works without an account | Yes |
| Developer API | Not stated |
| Browser extension | Yes |
| Languages | Not stated |
| Vendor | Grammarly (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.
The accuracy the vendor claims
“achieves 99% detection accuracy and ranks #1 on RAID's independent benchmark”
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.
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 AI Detector. 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.
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