Turnitin: what can and cannot be tested
Turnitin cannot be tested from outside an institution, so we do not publish numbers for it. This page exists to keep the vendor claims and the measurable results apart.
Read this first
Turnitin is institution-controlled: there is no public interface we can submit text to, so it is not in our panel and we publish no measured results for it. What is on this page is the separation between what vendors claim about Turnitin and what our panel can actually show.
Vendors that claim to beat Turnitin
vendor claim21 listed tools name Turnitin in their own marketing. This is what they say about themselves. It is not a result, we have not checked it , and it carries no date.
| Tool | Status here | Measured against Turnitin? |
|---|---|---|
| Phrasly | Docs checked API | not tested |
| AI Bypass | Docs checked | not tested |
| GPTinf | Docs checked | not tested |
| HIX Bypass | Docs checked API | not tested |
| Netus AI | Docs checked | not tested |
| Rephrasy | Docs checked API | not tested |
| StealthGPT | Docs checked API | not tested |
| AI Humanizer | Docs checked | not tested |
| AIHumanize.io | Docs checked API | not tested |
| Hastewire | Docs checked API | not tested |
| Humanize AI | Docs checked API | not tested |
| HumanizeAI.io | Docs checked | not tested |
| Rewritify | Docs checked | not tested |
| Ryne AI | Docs checked API | not tested |
| SupWriter | Docs checked API | not tested |
| Surfer AI Humanizer | Docs checked | not tested |
| AI Undetect | Docs checked API | not tested |
| Humbot | Established API | not tested |
| Bypass AI | Listed API | not tested |
| BypassGPT | Listed API | not tested |
| UnAIMyText | Listed | not tested |
About Turnitin
Full listing →| What it is | Institution-only AI writing indicator built into Turnitin's similarity reports and LMS integrations. |
|---|---|
| Accuracy the vendor claims | “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, not an audit |
| Price | Not published |
| False positives | Like every detector on this site, Turnitin flags genuine human writing sometimes. What a detector score means. |