Side by side
| Feature | GPTZero | ZeroGPT |
|---|---|---|
| What it does | Free AI detector that scores text for AI-generated content, sentence by sentence, for educators, students and writers. | Online AI content detector that flags AI-written text and images, plus paraphrasing, grammar and plagiarism tools for writers, students and educators. |
| Price from | not listed | not listed |
| Free plan | yes | yes |
| Platforms | web, chrome, api | web, api, whatsapp, telegram |
| API | yes | yes |
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
ZeroGPT: key features
- Sentence-level highlighting of AI-written text with an AI percentage gauge
- Downloadable PDF report for each detection
- AI Humanizer for rewriting AI text
- Plagiarism checker across billions of sources
- Paraphraser, summarizer, grammar checker and translator
- AI image and video detection
FAQ
Is GPTZero or ZeroGPT better?
It depends on the job - compare prices, free plans and features in the table above.
Are GPTZero and ZeroGPT 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. ZeroGPT: Yes, there is a free plan. Free plan, no credit card needed, with limited access to the tools (the 15,000-character limit shown on the homepage applies to the detector input).