Side by side
| Feature | GPTZero | Turnitin |
|---|---|---|
| What it does | Free AI detector that scores text for AI-generated content, sentence by sentence, for educators, students and writers. | Academic integrity platform that detects plagiarism and AI-generated writing and supports grading and feedback for schools and universities. |
| Price from | not listed | not listed |
| Free plan | yes | ? |
| Platforms | web, chrome, api | web |
| API | yes | not stated |
GPTZero: key features
- Overall AI score with sentence-by-sentence detection
- Detection of text from ChatGPT, GPT-5, Gemini, Claude and Llama
- Writing replay showing the typing process and copy-paste activity
- Plagiarism checker
- Grammar check and writing feedback
- Chrome extension and Google Docs integration with Canvas and Google Classroom
Turnitin: key features
- Plagiarism and similarity checking against large text databases
- AI writing detection and writing process analytics (Turnitin Clarity)
- Grading and feedback workflows (Feedback Studio)
- Flexible grading of paper-based work (Gradescope)
- Secure offline digital exam platform (ExamSoft)
- Originality checking for publishers and researchers (iThenticate)
FAQ
Is GPTZero or Turnitin better?
It depends on the job - compare prices, free plans and features in the table above.
Are GPTZero and Turnitin free?
GPTZero: Yes, there is a free plan. Free basic AI detection by pasting text into the scanner; the homepage advertises it as free. Paid features are not detailed in the provided text. Turnitin: The vendor does not state this clearly on the homepage or pricing page.